XtremePlace Forum

AV Galaxy => Planet Bass => Topic started by: soundaudio on March 18, 2011, 01:38

Title: Official Rythmik Subwoofer Thread
Post by: soundaudio on March 18, 2011, 01:38
I noticed there have been more and more ppl owned or DIY this brand lately,hope to see some of the owner post theirs thoughts & impressions also can share information, helpful tips, etc.of the sub.  ;D

http://www.rythmikaudio.com/products1.html
Title: Re: Official Rythmik Subwoofer Thread
Post by: NCMK on March 18, 2011, 12:06
Good to see a Rythmik owners' thread.  Recently bought 2 x F15SE from Rythmik direct before the S.E.A distro came into the picture.  I sold one off because of wife's constant nagging.  

4 months ago, Bro Xfi and I had the F15 built by our local DIY Guru, Bro Synthesis.  We were deeply impressed and sold the DIY F15, going for a much bigger Rythmik sub. The F25 was on our buying list but Brian Ding (owner of Rythmik audio) later informed the F25 was currently catered for US market only until further notice.  I guess shipping fee is a bomb.

Coming from Paradigm PDR10, Pardigm PS1000 and SVS PB12-NSD, Rythmik's bass is much faster, tighter and cleaner than any of the sub I used to have.   Music and movies never sound the same like before.   I'm also quite surprised my F15SE can dig deeper and deliver the visceral feel much better than any subs I used to have.  The new experience is totally phenomenon. The cornices on my ceilings are shaking even more vigorously.     I'm glad I've made the switch to a sealed sub.  

My next upgrade will be a Hsu MBM-12 to boost the flat mid-bass in Rythmik sub and a customised Subwoofer isolation pad from Elemental Design.  Meanwhile I'm using the Styrofoam that came with the shipping box as a supporting base.  

It seems that the local community is now more aware of this brand. 2 thumbs up for Rythmik

Title: Re: Official Rythmik Subwoofer Thread
Post by: anfieldude on March 20, 2011, 18:03
Dual F15 owner here. 1 is PEQ2 DI and the other PEQ2. Will upgrade to DI within the next few weeks when I get the board.

I also had the FV15HP for a short while.

The FV15HP is a beast. Output wise it easily put out SPL louder than dual F15s. The F15s in my room dig deeper and since in my case music is a priority, sealed subs are more to my liking.

I think Rythmiks are exceptional value now that there are local dealers to support Rythmik.
Title: Re: Official Rythmik Subwoofer Thread
Post by: fengshenwee on March 21, 2011, 02:57
After like 3 years of audio, I finally manage to get Police to knock on my door thanks to Rythmik F12. lol
Title: Re: Official Rythmik Subwoofer Thread
Post by: jonchew on March 21, 2011, 13:21
Brother.You are the best ! Invited Police to audition your remarkable F12 .

After like 3 years of audio, I finally manage to get Police to knock on my door thanks to Rythmik F12. lol
Title: Re: Official Rythmik Subwoofer Thread
Post by: fengshenwee on March 21, 2011, 17:46
Brother.You are the best ! Invited Police to audition your remarkable F12 .


They love it but I hope they dun come back for a second audition soon. lol
Title: Re: Official Rythmik Subwoofer Thread
Post by: skywalker on April 02, 2011, 03:45
Hi guys, I've got a F12 too. Just wondering what type of RCA interconnects are you guys using to hook up your sub? Also what's the difference between using a single subwoofer interconnect versus RCA? A little clueless regarding this so I really appreciate any advise/tips, thanks!
Title: Re: Official Rythmik Subwoofer Thread
Post by: anfieldude on April 02, 2011, 10:49
Hi guys, I've got a F12 too. Just wondering what type of RCA interconnects are you guys using to hook up your sub? Also what's the difference between using a single subwoofer interconnect versus RCA? A little clueless regarding this so I really appreciate any advise/tips, thanks!

I use a single cable for mine (subwoofer out from avr). The difference between using L/R RCA split would be about 6dB gain. No difference in sound or anything.
Title: Re: Official Rythmik Subwoofer Thread
Post by: xfi on April 04, 2011, 08:26
Owner of 2 F15s here. Can say that I can't be any happier with the sound I'm getting. 2 F15s are more than enough to provide any Ground shaking SPL and there are times when I have to turn down the SW level to make sure no objects starts dropping down to the floor.

What pleases me most is the quality of the bass. I watched The Sorcerer's Apprentice yesterday and man, I like to be blown away! It is hard to describe "articulate", "fast", "tight" and really, it is best appreciated by listening.
Title: Re: Official Rythmik Subwoofer Thread
Post by: matix on April 04, 2011, 09:02
Owner of F12 here.  Has anyone use the equalization in the PEQ?  I tried to digest from the website what to do.  But did not quite understand it.  Seems like it is only correcting 1 peak.  I suppose if you have Audessey, you won't need to fiddle with it right?
Title: Re: Official Rythmik Subwoofer Thread
Post by: anfieldude on April 04, 2011, 10:12
Owner of F12 here.  Has anyone use the equalization in the PEQ?  I tried to digest from the website what to do.  But did not quite understand it.  Seems like it is only correcting 1 peak.  I suppose if you have Audessey, you won't need to fiddle with it right?

Yes, the PEQ is to correct one peak (or valley - not really recommended). In my experience, if u have a large peak, its better to tame it then run Audyssey. That way u free up the filters in Audyssey. Also I hv seen in the past when u have a large peak and a fall off (and then it recovers, so in essence not the -3dB point for the sub), Audssey tends to sometimes catch that as the false -3dB point of ur sub.
Title: Re: Official Rythmik Subwoofer Thread
Post by: soundaudio on April 05, 2011, 03:51
Great to see more and more ppl owned the sub.
Title: Re: Official Rythmik Subwoofer Thread
Post by: tane0019 on April 05, 2011, 11:26
Any one can share where to download the user manual of F12 SUB ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: fengshenwee on April 05, 2011, 17:01
Any one can share where to download the user manual of F12 SUB ?

The manual is just a piece of paper. Nothing much. Dun think u can download anywhere unless u buy the sub. Maybe u can email brian for it.
Title: Re: Official Rythmik Subwoofer Thread
Post by: NCMK on April 05, 2011, 18:01
The amp guide can be found here http://www.rythmikaudio.com/amplifiers.html
Title: Re: Official Rythmik Subwoofer Thread
Post by: tane0019 on April 05, 2011, 19:10
thanks.
Title: Re: Official Rythmik Subwoofer Thread
Post by: tane0019 on April 12, 2011, 23:12
Just got the F12SE - A370PEQ2.
Slightly different control w.r.t. the link.
Is there a better manual somewhere ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: anfieldude on April 13, 2011, 06:22
Just got the F12SE - A370PEQ2.
Slightly different control w.r.t. the link.
Is there a better manual somewhere ?

Link to PEQ2 amp guide.

http://www.rythmikaudio.com/download/A370PEQ2.pdf (http://www.rythmikaudio.com/download/A370PEQ2.pdf)

Link to sub tuner (Java) to help with some basic settings to blend with ur mains.

http://www.rythmikaudio.com/subtuner2.html (http://www.rythmikaudio.com/subtuner2.html)

Let me know if u need further help and I will try to help.
Title: Re: Official Rythmik Subwoofer Thread
Post by: jaemon on April 22, 2011, 11:44
which model should i go for if my room is 3m by 3m?
Title: Re: Official Rythmik Subwoofer Thread
Post by: NCMK on April 22, 2011, 11:53
which model should i go for if my room is 3m by 3m?

Go for the biggest you can afford.  F15 output is twice of F12 and the price difference is minimal.
Title: Re: Official Rythmik Subwoofer Thread
Post by: jaemon on April 22, 2011, 12:06
thanks, will take a look at f15.
Title: Re: Official Rythmik Subwoofer Thread
Post by: matix on April 22, 2011, 12:23
which model should i go for if my room is 3m by 3m?

Perfect square room?  There will be problems...   Seriously, I think F12 will be enough..  My 2 cents only...
Title: Re: Official Rythmik Subwoofer Thread
Post by: fengshenwee on April 22, 2011, 12:26
which model should i go for if my room is 3m by 3m?

3m by 3m is smaller than my room which 3.35m by 3.6m. F12 should be enough if u ask me. If u upgrading to a bigger to in the near future, just add another F12. :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: jaemon on April 22, 2011, 16:41
will there be any issue if i run f15 instead of f12? since that the price diff is not that big.
Title: Re: Official Rythmik Subwoofer Thread
Post by: soundaudio on April 22, 2011, 19:49
Brother,better act fast as from what I know the price will be increase sooner once the dealer is settled in Singapore
by  May or June.!!

will there be any issue if i run f15 instead of f12? since that the price diff is not that big.
Title: Re: Official Rythmik Subwoofer Thread
Post by: jaemon on April 23, 2011, 00:09
Will buy once i get a buyer for my audio engin s8

Just wondering which to get only for now
Title: Re: Official Rythmik Subwoofer Thread
Post by: kristrip on April 23, 2011, 00:25
if you've measured out the space for the f15 and have enough, and you're willing to pay the extra, then why not. But for your room, the F12 definitely has enough output to make you go deaf
Title: Re: Official Rythmik Subwoofer Thread
Post by: jaemon on April 23, 2011, 01:24
thanks, in that case i will go for f12. can save then save since i wont be moving the system anytime in the foreseeable future
Title: Re: Official Rythmik Subwoofer Thread
Post by: anfieldude on April 23, 2011, 10:26
thanks, in that case i will go for f12. can save then save since i wont be moving the system anytime in the foreseeable future
jaemon,

If u do not listen to ur stuff loud, the F12 is sufficient, if u need more headroom, get the F15.
Title: Re: Official Rythmik Subwoofer Thread
Post by: jaemon on April 26, 2011, 10:48
If im using the sub for mostly movie should i opt for f15? As i rdered the f12 just afraid that it might not be powerful enough
Title: Re: Official Rythmik Subwoofer Thread
Post by: xfi on April 26, 2011, 11:14
If im using the sub for mostly movie should i opt for f15? As i rdered the f12 just afraid that it might not be powerful enough

Prob depends on your room size. Small compact room, should be ok. Later u might want to add another F12 to smoothen response. It will be very nice becos u can't localise ur sub and it just fills the whole room evenly with bass.

How come no one considering the FV15? Not a bad choice for HT unless u must absolutely have sealed sub.
Title: Re: Official Rythmik Subwoofer Thread
Post by: C-Major on April 27, 2011, 20:55
Hi, Bro,

Where to buy and view this Rythmik Subwoofer F15 in Singapore?

Thanks
Title: Re: Official Rythmik Subwoofer Thread
Post by: fengshenwee on April 28, 2011, 01:11
Hi, Bro,

Where to buy and view this Rythmik Subwoofer F15 in Singapore?

Thanks

U can't except in fellow owners home as there are no local agent. Region agent in Malaysia.
Title: Re: Official Rythmik Subwoofer Thread
Post by: soundaudio on April 28, 2011, 08:33
Hi, Bro,
Where to buy and view this Rythmik Subwoofer F15 in Singapore?
Thanks

There will be a distributor in local very soon, maybe at
next month or Jun. You can audition once the show room
is set up by the distributor,alternative you may audition JL Audio
subwoofer at SD if your budget is 2k plus for entry level sub
which is very good for  HT and Audio IMO .
Title: Re: Official Rythmik Subwoofer Thread
Post by: Pingu on April 28, 2011, 10:40
Hi, Bro,

Where to buy and view this Rythmik Subwoofer F15 in Singapore?

Thanks

I'm in the West, with the F15.

PM me if you want a feel this weekend. But I'm still tweaking it and it's not run in yet...
Title: Re: Official Rythmik Subwoofer Thread
Post by: xfi on April 28, 2011, 14:19
Yeah, need to run in before can hit bass nirvana. :P
Title: Re: Official Rythmik Subwoofer Thread
Post by: C-Major on April 28, 2011, 15:06
I'm in the West, with the F15.

PM me if you want a feel this weekend. But I'm still tweaking it and it's not run in yet...

Thanks Bro,

I am consider between Rythmik or Hsu, So either wait till June or get the Hsu from State.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 28, 2011, 15:29
The shipment will be in our warehouse by tomorow and some Amp Modual 370PEQ2 also have be received .
We will run in some unit by next week and start some home trial by than , so any one keen can just pm to arange.

Peng
Title: Re: Official Rythmik Subwoofer Thread
Post by: rayleh on April 28, 2011, 17:02
I am also contemplating between Hsu or F12
Title: Re: Official Rythmik Subwoofer Thread
Post by: soundaudio on April 28, 2011, 19:36
The shipment will be in our warehouse by tomorow and some Amp Modual 370PEQ2 also have be received .
We will run in some unit by next week and start some home trial by than , so any one keen can just pm to arange.
Peng

Are you the dealer of Rythmik subwoofer in Sinapore?
Where is the show room available for audition ? Thanks.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 28, 2011, 19:41
It will be ready for demo at 01-20 The Artcoustic Gallery after we run in the F12 and F15 by next week.

Peng
Title: Re: Official Rythmik Subwoofer Thread
Post by: rayleh on April 28, 2011, 21:21
Do u have the pricing yet?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 28, 2011, 22:04
Do u have the pricing yet?

For the start , you can follow this link at the giude but just add the local handling charge and GST.
http://www.xtremeplace.com/yabbse/index.php?topic=90559.msg638541#msg638541
Title: Re: Official Rythmik Subwoofer Thread
Post by: francishuang on April 28, 2011, 22:56
looks like i have to make a trip down ur place soon. looking for avr, sub, projector/screen, surround n rear (wall mount or inceiling)


It will be ready for demo at 01-20 The Artcoustic Gallery after we run in the F12 and F15 by next week.

Peng
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 28, 2011, 23:29
looks like i have to make a trip down ur place soon. looking for avr, sub, projector/screen, surround n rear (wall mount or inceiling)



You are welcome , but till next Wed than will setup the F12and F15 with all ceilling flush AG speaker.
will text you when am done and have your nos and do Text me @ 96387418 if you hv any Question.

Peng
Title: Re: Official Rythmik Subwoofer Thread
Post by: lonesax on April 30, 2011, 01:01
I was wondering if my set-up is ok. I have 2 inputs in to my rythmik sub the left goes into my avr's lfe and the right input is from my dac which outputs the full range, this is shared with both my stereo spreakers and my sub
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 30, 2011, 01:07
Ok , here is the reply for all who asked the price.

 F12 Black Oak Grain with A370PEQ2
(http://i420.photobucket.com/albums/pp288/soundfusionsb/F12.jpg)

* Driver  12" high excursion with custom sensing coil 
* Driver materials Black or silver anodized aluminum with rubber surround 
* Cast aluminum basket 
* Copper flux modulation shorting rings 
* Amplifier  370w RMS class A/B patented servo controlled
* Dimensions 15-3/4"(W) x 15-3/4" (H )x 17"(D) - (18-1/2" D with grille) 
* Shipping Weight 80 lbs 
* Frequency Response  14 - 100 Hz (-2 dB @ 14 Hz) 
* Crossover slope  Selectable 12 or 24 dB / octave (PEQ and XLR versions) 
* Crossover range (Low pass)  25 - 100 Hz
* Rumble Filter (High pass )  20 Hz 18 dB / octave 
* Phase response  90 degrees phase shift at 20 Hz 
* Phase adjustment  0 - 180 degrees continuously variable 
* Bass damping factor settings  high (Q=0.5), med (Q=0.7), and low (Q=1.1) 
* Finishes Available in Black Oak Vinyl and Piano Finish

F12     $ 1449 / $1550 with GST
F12se  $1699 / $1818 with GST

2. F15 Black Oak Grain with A370PEQ2
(http://i420.photobucket.com/albums/pp288/soundfusionsb/F15.jpg)

* Driver  15" high excursion with custom sensing coil 
* Driver materials Black anodized aluminum with rubber surround 
* Cast aluminum basket 
* Aluminum flux modulation shorting rings 
* Amplifier  370w RMS class A/B patented servo controlled
* Dimensions 19"(W) x 19 " (H )x 20 "(D) - (21-1/2" D with grille) 
* Shipping Weight 102 lbs 
* Frequency Response  14 - 90 Hz (-2 dB @ 14 Hz) 
* Crossover slope  Selectable 12 or 24 dB / octave (PEQ and XLR versions) 
* Crossover range (Low pass)  25 - 100 Hz
* Rumble Filter (High pass )  20 Hz 18 dB / octave
* Phase response  90 degrees phase shift at 20 Hz 
* Phase adjustment  0 - 180 degrees continuously variable 
* Bass damping factor settings  high (Q=0.5), med (Q=0.7), and low (Q=1.1) 
* Finishes Available in black oak vinyl and piano finish
F15     $ $1649 / $1765 with GST
F15se  $1899 / $2032 with GST

For the FV series will only be available by end May
Peng
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 30, 2011, 01:17
I was wondering if my set-up is ok. I have 2 inputs in to my rythmik sub the left goes into my avr's lfe and the right input is from my dac which outputs the full range, this is shared with both my stereo spreakers and my sub

this will not be the good way . beco when you using the Dac the full band signal is send to the sub pre-amp and the line out level from your dac may overdrive the pre-amp and causes clipping to the Amp modual. furthermore , you are not able to do any further Eq or adj , since the sub already calibrated for your AVR.
Title: Re: Official Rythmik Subwoofer Thread
Post by: anfieldude on April 30, 2011, 08:14
I was wondering if my set-up is ok. I have 2 inputs in to my rythmik sub the left goes into my avr's lfe and the right input is from my dac which outputs the full range, this is shared with both my stereo spreakers and my sub

R the inputs active at the same time?

U might want to consider dual inputs (DI) so that u can send the full L/R from u DAC to the L/R input of the sub and LFE from ur AVR to the LFE input.
Title: Re: Official Rythmik Subwoofer Thread
Post by: lonesax on May 01, 2011, 10:59
But I bought my sub already so is there any other way of doing this rather then changing the inputs all the time.
When I'm listening to music only 1 input is active but when watching movies both are active.
I don't mind if my the signal from my dac gets bypass and my Avr takes full control of the sub
Title: Re: Official Rythmik Subwoofer Thread
Post by: anfieldude on May 01, 2011, 12:08
But I bought my sub already so is there any other way of doing this rather then changing the inputs all the time.
When I'm listening to music only 1 input is active but when watching movies both are active.
I don't mind if my the signal from my dac gets bypass and my Avr takes full control of the sub

U can get the add on for the DI. To do that u would need to change the whole preamp board on the sub. I did it for both my F15s.

If u do not want to, I would advise to remove the signal from the DAC when u listen to movies.

The DI option is pretty cool. Even with inputs simultaneous on, the LFE option bypasses the crossovers, so to minimize the leakage from the mains u can set the L/R crossover lower.
Title: Re: Official Rythmik Subwoofer Thread
Post by: lonesax on May 02, 2011, 02:47
That sounds like a pretty good idea but how much does it cost ? Can we trade in the old 1 back to them ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: anfieldude on May 02, 2011, 13:29
That sounds like a pretty good idea but how much does it cost ? Can we trade in the old 1 back to them ?

Check with ur local dealer or send a request to Rythmik.

Do remember that changing it is no simply plug and play. It involves removing quite a few screws and properly sealing the amp after that to prevent air leakage.

Title: Re: Official Rythmik Subwoofer Thread
Post by: DIRTRUN on May 08, 2011, 15:35
Look wat d stork brought :

(http://i175.photobucket.com/albums/w159/dirtrun/8968a855.jpg)

(http://i175.photobucket.com/albums/w159/dirtrun/c39a5eae.jpg)

(http://i175.photobucket.com/albums/w159/dirtrun/73ade460.jpg)
F15

(http://i175.photobucket.com/albums/w159/dirtrun/276e9e7d-1.jpg)
De crate it came in..

N for posterity's sake..
(http://i175.photobucket.com/albums/w159/dirtrun/affc7143.jpg)

D
Title: Re: Official Rythmik Subwoofer Thread
Post by: xfi on May 08, 2011, 19:41
Look wat d stork brought :


U combining rythmik with svs? :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: fengshenwee on May 09, 2011, 16:12
Correct me if I am wrong but isn't it a bad idea to try to integrate two different brand/model subs in one system?

Title: Re: Official Rythmik Subwoofer Thread
Post by: Doggie Howser on May 09, 2011, 16:51
Pooh comes with the sub?
Title: Re: Official Rythmik Subwoofer Thread
Post by: francishuang on May 09, 2011, 18:55
if tats the case, will demand a piglet bundle with my f12!

Pooh comes with the sub?
Title: Re: Official Rythmik Subwoofer Thread
Post by: anfieldude on May 10, 2011, 18:06
Correct me if I am wrong but isn't it a bad idea to try to integrate two different brand/model subs in one system?



Not if u can get both of them to behave well with each other. I used to actually run a ported and the F15 before and it blended well. It all depends on ur placement, phase cancellation etc.

For those going dual subs, its vital that u hv an option to move subs around in the room. If u don't then u need to pray that the 2 spots don't cause problems with each other.
Title: Re: Official Rythmik Subwoofer Thread
Post by: DIRTRUN on May 11, 2011, 13:53
U combining rythmik with svs? :)
Yes

Correct me if I am wrong but isn't it a bad idea to try to integrate two different brand/model subs in one system?
Yes..

But then again .. I never did like to follow rules..

Pooh comes with the sub?
Heh heh
Title: Re: Official Rythmik Subwoofer Thread
Post by: lonesax on May 12, 2011, 01:32
Today i finally got all my footers and sub into place.
Althought this seems like a stupid idea but I got a set of 3 35s  footers with herbie's isolation feet sandwich together but the footers are still vibrating like mad.
Makes me wonder if taoc is really that good after all.
After 1 month most probably the internal spike portion would wear off totally
Title: Re: Official Rythmik Subwoofer Thread
Post by: tane0019 on May 18, 2011, 22:53
Finally get my replacement amp plate (the original one was spoilt after 2-3days - what luck :'().

Now everything is working fine - fingers cross that I do not need to replace the amp plate myself again.

(http://i1121.photobucket.com/albums/l511/tane0019/P4230078.jpg)(http://i1121.photobucket.com/albums/l511/tane0019/P4230079.jpg)
(http://i1121.photobucket.com/albums/l511/tane0019/P4230093.jpg)(http://i1121.photobucket.com/albums/l511/tane0019/P4230100.jpg)

Title: Re: Official Rythmik Subwoofer Thread
Post by: zenesh on May 20, 2011, 13:44
Is dual f12 enough for HDB living room?


Think the hall is 6.5m x 5.5m

Thanks
Title: Re: Official Rythmik Subwoofer Thread
Post by: jimi on May 20, 2011, 14:17
Today i finally got all my footers and sub into place.
Althought this seems like a stupid idea but I got a set of 3 35s  footers with herbie's isolation feet sandwich together but the footers are still vibrating like mad.
Makes me wonder if taoc is really that good after all.
After 1 month most probably the internal spike portion would wear off totally

Correct me if I'm wrong Andy, but I thought the TITE 35s not opposed to be under a sub. More for normal speakers or components.

The big vibrational movment made by a sub would be better attenuated with a Auralex SubDude or equivalent.

What's the reason for isolating it? For cleaner bass or reducing transmission to the floor etc?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on May 24, 2011, 23:43
Is dual f12 enough for HDB living room?


Think the hall is 6.5m x 5.5m

Thanks
welcome you to check out how it sound in our 5x7m showroom with single F12 setting vs double F12 or 1F12+!F15 setup.
text me @ 96387418 to arange a demo

Peng
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on June 01, 2011, 01:52
Hi enonav bro,
Are the high powered models available, specifically the F15HP-600? Btw can you pm me the price of the F15HP if available. Many thanks.

Sorry for late reply , please see link.
http://www.xtremeplace.com/yabbse/index.php?topic=95943.msg674155#msg674155
Title: Re: Official Rythmik Subwoofer Thread
Post by: funhur on July 08, 2011, 09:16
Hi guys, I am a little confused with the Bass Extension control switch namely the AVR/12 and LFE position. Am I right to say
1) at position AVR/12, the subwoofer is playing up to 90Hz (as the spec state)
2) at position LFE, its playing up to 200Hz

The website articles suggest to use AVR/12 when used with a AVR with bass management. I am using a Denon AVR with Audyssey MultiEQ and it sets the crossover for my center/rear to 100Hz, FL/R at 80Hz. For my case, should I be using LFE or AVR/12 ?

Hope to get some advise, thanks. I am having the F15 PEQ2
Title: Re: Official Rythmik Subwoofer Thread
Post by: anfieldude on July 08, 2011, 15:14
I would suggest LFE. The LPFs are of a different slope for the 2. AVR 1/2 does not really bypass the controls on the sub, the LFE more or less defeats the controls. It extends ur output to about 180Hz and the crossovers do not matter, but I would put it at the highest point to be sure. I need to pull up my old REW plots before I changed it to PEQ2 DI.

If u do use AVR 1/2 ensure that u set the crossover to max.
Title: Re: Official Rythmik Subwoofer Thread
Post by: funhur on July 09, 2011, 18:27
@anfieldude thanks. Somehow I prefer the avr/12 setting. In any case, the sub is great sounding! Find myself listening back all my CDs
Title: Re: Official Rythmik Subwoofer Thread
Post by: anfieldude on July 11, 2011, 07:07
If u r using for music and not using an AVR, I would suggest 80/24 setting and setting the crossover on the plate amp to blend in with ur music. LFE setting on a non bass management amp could cause localization.

Using LFE could cause localization if the LPF is not set up in the AVR (although all AVRs hv it set at 120Hz most of the time to meet Dolby standards, some hv been known to use 180Hz)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on July 14, 2011, 02:58
They are ready for demo
FV-15Hp
(http://img825.imageshack.us/img825/7450/img1222o.jpg) (http://imageshack.us/photo/my-images/825/img1222o.jpg/)

(http://img51.imageshack.us/img51/6301/img1220s.jpg) (http://imageshack.us/photo/my-images/51/img1220s.jpg/)

D-15se
(http://img717.imageshack.us/img717/8832/img1259my.jpg) (http://imageshack.us/photo/my-images/717/img1259my.jpg/)

(http://img27.imageshack.us/img27/2415/img1260q.jpg) (http://imageshack.us/photo/my-images/27/img1260q.jpg/)

(http://img543.imageshack.us/img543/3663/img1263y.jpg) (http://imageshack.us/photo/my-images/543/img1263y.jpg/)

(http://img850.imageshack.us/img850/1995/img1258cd.jpg)[/URL (http://imageshack.us/photo/my-images/850/img1258cd.jpg/)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sdds on July 14, 2011, 21:42
I would like to take this opportunity to thank Peng ( econav) for helping me to transport two huge rythmik fv 15 hp subwoofer to my place . Really heavy one person difficult to manage . Tonite time to hear what this monster subwoofer can do .
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on July 14, 2011, 21:51
Wow congrats on the purchase ! Many things to do for the weekend already :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: funhur on July 14, 2011, 21:58
@sdds wow congrats. I thought you wanted something else the other time? Please give your review :) My friend is also getting a FV15HP for his new house, not sure if he took delivery liao.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sdds on July 15, 2011, 09:15
Yes I wanted to try out seaton subversive n danely dts 10 , as for seaton sub try to order from them but the response from them was very slow , take ages to response yr email . As for danely dts 10 , too huge for my room n heavy to move around . Therefore settle for rythmik as I am firmilar with the sound clean n tight , by the way can be very addictive when listening to rock concert DVD or Blu ray . Yesterday night , just did a fast hookup n setup , the first impression over the f15 & f12 which I used to own , lower bass n depth . Similar clean n tight bass sound . If you are more into movie n have the space maybe can try out this beast , as the price is attractive . Minus point dull finish n need room to breath & not very possible to do the crawl method as the sub weight over 120 Ibs , need two man power to shift around . As the driver is new , need more time to run before I can comment further . By the way , heard from Peng the pricing for the nxt shipment may increase , try to get them while the us dollar is low. Cheers.
Title: Re: Official Rythmik Subwoofer Thread
Post by: funhur on July 15, 2011, 16:39
I recall reading with 1 port mode, it can be as tight as the sealed box variant in F12/15 yet it has the ported advantages. Good for you.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sdds on July 15, 2011, 18:46
Thx bro for the information . Just wonder those bro who has already the fv 15 , what are their impression ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: DIRTRUN on July 16, 2011, 13:06
Thx bro for the information . Just wonder those bro who has already the fv 15 , what are their impression ?
Hi..

I dont hv d fv15 [only f15] but I tink a direct comparison is de SvS pb12+ n its cheaper wif a bigger driver..

Well.. comparin physical specs n price anyway..
D
Title: Re: Official Rythmik Subwoofer Thread
Post by: htkaki on August 03, 2011, 16:55
Hi..

I dont hv d fv15 [only f15] but I tink a direct comparison is de SvS pb12+ n its cheaper wif a bigger driver..

Well.. comparin physical specs n price anyway..
D
Yes. Audioholics.com did the shootout by comparing FV15HP with PB12-Plus. But, given the slight difference in performance and the price gap, it's a no brainer.
Title: Re: Official Rythmik Subwoofer Thread
Post by: maomao82 on August 30, 2011, 15:38
Anyone can advise where to audition Rythmik subwoofers?

Who is the local dealer? Econ AV concepts? only saw their branch in Selangor?
The Artcoustic Gallery #01-20 The Adelphi ???

A bit confusing... Or buy straight from Rythmik & pay for the freight? How does the warranty works then?
Title: Re: Official Rythmik Subwoofer Thread
Post by: Supra_yap on August 30, 2011, 15:44
Dealer: The Artcoustic Gallery #01-20 The Adelphi

Look for Peng 96387418

U love fall in love this Rythmik subwoofers is a beast!!!
Title: Re: Official Rythmik Subwoofer Thread
Post by: 5th Avenue on August 31, 2011, 14:57
Anyone can advise where to audition Rythmik subwoofers?

Who is the local dealer? Econ AV concepts? only saw their branch in Selangor?
The Artcoustic Gallery #01-20 The Adelphi ???

A bit confusing... Or buy straight from Rythmik & pay for the freight? How does the warranty works then?

Hi,
The last I heard, there's still the F12 or F12SE in the showroom for audition. There's a thread in HT sales on the model available for sale.

Got my F15 & FV15HP from Econav. Look for Peng....he can give advice on the technicalities of a sub & setting up for hours...which I appreciated.

Do consider that the cost of shipping direct is quite substantial and of cos the problem of waranty if you got a lemon.

Cheers  :) :)


Title: Re: Official Rythmik Subwoofer Thread
Post by: maomao82 on September 01, 2011, 05:05
I'm keen on the F15.. so probably make a trip down soon.  :D
Title: Re: Official Rythmik Subwoofer Thread
Post by: jigster on September 18, 2011, 20:38
May I ask how do you connect 2 F12s in a stereo speaker setup?

One channel to each sub?
Or can they be daisy-chained?
Which is better?

Thanks.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 20, 2011, 17:45
You use a pre + power ?
what you want to achieve ? deep low ends or ?
No point to use 2 sub and daisy-chained ?
for pure 2CH ,connect to L and R at HI level input  if you don't have a pre out.
Title: Re: Official Rythmik Subwoofer Thread
Post by: rayleh on September 20, 2011, 20:43
Hi Peng,

I read from the Rythmik website that the frequency response of F12 is from 16Hz to 100Hz so does that mean F12 can only go up to 100Hz?
Title: Re: Official Rythmik Subwoofer Thread
Post by: jigster on September 21, 2011, 00:18
You use a pre + power ?
what you want to achieve ? deep low ends or ?
No point to use 2 sub and daisy-chained ?
for pure 2CH ,connect to L and R at HI level input  if you don't have a pre out.

Yes, using pre+power.
I am looking to extend the range of my speakers, the frequency range is from 29Hz to 20KHz.
Or would 1 sub be sufficient?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 21, 2011, 01:13
Hi Peng,

I read from the Rythmik website that the frequency response of F12 is from 16Hz to 100Hz so does that mean F12 can only go up to 100Hz?

No , that is the roll off point and extend upto 200 Hz -3db @LFE setting.
you looking to improve mid bass ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 21, 2011, 01:19
Yes, using pre+power.
I am looking to extend the range of my speakers, the frequency range is from 29Hz to 20KHz.
Or would 1 sub be sufficient?
if you want to extend the lower ends ,single F15 will be better than 2x F12.
depend very much on yr main speaker and yr taste,maybe just a f12 will do.
drop by ,so I can show you how easy to integrate a Rythmik with even very small speaker.

Btw , what is yr Main speaker set ?

Peng
Title: Re: Official Rythmik Subwoofer Thread
Post by: jigster on September 21, 2011, 01:23
if you want to extend the lower ends ,single F15 will be better than 2x F12.
depend very much on yr main speaker and yr taste,maybe just a f12 will do.
drop by ,so I can show you how easy to integrate a Rythmik with even very small speaker.

Btw , what is yr Main speaker set ?

Peng

A pair of old Pioneer 2402 horns, which I have extended the highs with a pair of super tweeters.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 21, 2011, 01:33
A pair of old Pioneer 2402 horns, which I have extended the highs with a pair of super tweeters.

If you can get hold of a pair of TL1601 woofer to replace  will be better than add a sub .
Title: Re: Official Rythmik Subwoofer Thread
Post by: jigster on September 21, 2011, 01:46
If you can get hold of a pair of TL1601 woofer to replace  will be better than add a sub .

Replace? Dun understand. The built-in woofer is a TL1601.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 21, 2011, 03:29
This is a pair of good spk can go very low , but due to age the efficiency of the woofer drop quite a bit . I have use this before in the early day .
Title: Re: Official Rythmik Subwoofer Thread
Post by: rayleh on September 21, 2011, 07:20
No , that is the roll off point and extend upto 200 Hz -3db @LFE setting.
you looking to improve mid bass ?

I am looking to add another sub. I already have a SVS SB-12NSD.
Title: Re: Official Rythmik Subwoofer Thread
Post by: jigster on September 21, 2011, 09:54
This is a pair of good spk can go very low , but due to age the efficiency of the woofer drop quite a bit . I have use this before in the early day .

Ok, perhaps I will look out for that then. Thanks for the advice, Peng.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 11, 2011, 09:33
The New F15HP  15" sealed 600w sub is ready for demo

On demo are
F12 & F12se
F15 & F15se
D15
F15HP
Fv15HP ( ported )

Peng
Title: Re: Official Rythmik Subwoofer Thread
Post by: 5th Avenue on November 11, 2011, 17:06
You can go wrong with FV15HP for HT and F15 for HiFi

Hahaha... ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: huanges on November 11, 2011, 20:39
Just bought the F15HP from peng. I understand that he has 1 more in stock. Those on the fence betta act fast. Else wait for next shipment. cheers!

And thank you bro peng for all da advise!  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: akdwivedi on November 12, 2011, 01:15
The New F15HP  15" sealed 600w sub is ready for demo

On demo are
F12 & F12se
F15 & F15se
D15
F15HP
Fv15HP ( ported )
Peng

Bro.. whats the price of Fv15HP..
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 12, 2011, 01:18
Bro.. whats the price of Fv15HP..

Fv15HP @ $2140 nett.
Title: Re: Official Rythmik Subwoofer Thread
Post by: huanges on November 13, 2011, 22:13
Hooked up my F15HP today. Have not really calibrated properly yet. Played some clips from Desray's Demo Disc and can immediately feel the difference compared to my previous sub (Klipsch sub 10). For starters, there was less irritating rattling on my windows and built-in wall cabinet, instead I could feel my sofa rumbling under my butt (master and commader cannons). One scene (hurt locker or war of the worlds cant remember which one) had my walls and floor vibrating. WOW!  :o. Now really need do homework to learn how to calibrate my set up properly. Sigh...dun really like that part as I'm not really a technical person.  :(.

Any experts with experience in calibration (with SPL meter) willing to help me optimise my system? In turn, you get to audition the F15HP, panny ae7000k projector on dalite 106" HP pull down screen......pm me ok........did I also mention I'm on the 32 floor ;D  (amp Onkyo SR507, L/R Klipsch RB61, C Klipsch RC52. Location Blk 89 Tanglin Halt Road)
Title: Re: Official Rythmik Subwoofer Thread
Post by: 5th Avenue on November 14, 2011, 08:19
Hooked up my F15HP today. Have not really calibrated properly yet. Played some clips from Desray's Demo Disc and can immediately feel the difference compared to my previous sub (Klipsch sub 10). For starters, there was less irritating rattling on my windows and built-in wall cabinet, instead I could feel my sofa rumbling under my butt (master and commader cannons). One scene (hurt locker or war of the worlds cant remember which one) had my walls and floor vibrating. WOW!  :o. Now really need do homework to learn how to calibrate my set up properly. Sigh...dun really like that part as I'm not really a technical person.  :(.

Any experts with experience in calibration (with SPL meter) willing to help me optimise my system? In turn, you get to audition the F15HP, panny ae7000k projector on dalite 106" HP pull down screen......pm me ok........did I also mention I'm on the 32 floor ;D  (amp Onkyo SR507, L/R Klipsch RB61, C Klipsch RC52. Location Blk 89 Tanglin Halt Road)

Hi huanges,

Have a word with Peng on the adjustment tips. You will become quite proficient after a few try.

The refinement of the sub setting is when you get/feel "blast in the chest" for gun shot or explosion scene without the boomyness... :)

Depending on your room size and sub capability, some may need more than 1 sub to achieve it.

Happy tinkering... ;D

 
Title: Re: Official Rythmik Subwoofer Thread
Post by: huanges on November 14, 2011, 19:46
Hi huanges,

Have a word with Peng on the adjustment tips. You will become quite proficient after a few try.

The refinement of the sub setting is when you get/feel "blast in the chest" for gun shot or explosion scene without the boomyness... :)

Depending on your room size and sub capability, some may need more than 1 sub to achieve it.

Happy tinkering... ;D

 


Yes peng did give me some good advice. Half of which i dun understand ;D. Guess I need to go through a few rounds of fiddling and reading up before I can finally get it.

Yup, the problem with my previous vented 10" sub was the boominess which i dislike and you nailed it perfectly in terms of what proper bass should be. I did feel it with the F15HP yesterday but I'm sure there is lot more improvements to be made. Overall its a great purchase and am extremely pleased with it. Would be even better with the silver cone though.....  :P

cheers, Huang.
Title: Re: Official Rythmik Subwoofer Thread
Post by: r0n1n31 on November 15, 2011, 08:08
One scene (hurt locker or war of the worlds cant remember which one) had my walls and floor vibrating. WOW!  :o.

That's why it's called "HP"!  :o congrats on your new toy  ;D

Me and my friend auditioned the F12, but was far more impressed by F15, I cannot imagine if there was F15HP at that time  8)   the only problem: no WAF due to its massive size  :'(
Title: Re: Official Rythmik Subwoofer Thread
Post by: r0n1n31 on November 15, 2011, 08:09
I did feel it with the F15HP yesterday but I'm sure there is lot more improvements to be made. Overall its a great purchase and am extremely pleased with it. Would be even better with the silver cone though.....  :P

cheers, Huang.

I like the silver cone too, but that is for the SE subs per Peng
Title: Re: Official Rythmik Subwoofer Thread
Post by: Old school on November 24, 2011, 22:07
Need advise fm expert here, can I mix match differend brand sub, I hv jl 112 wish add one sub, ideally will be another f 112 but budget constraint tink of rythmik 12 ich. Pls comment.
Title: Re: Official Rythmik Subwoofer Thread
Post by: r0n1n31 on November 24, 2011, 23:07
Need advise fm expert here, can I mix match differend brand sub, I hv jl 112 wish add one sub, ideally will be another f 112 but budget constraint tink of rythmik 12 ich. Pls comment.

yes you can, but i've read tuning is tough. you might want to invest on EQ devices like BFD, Antimode or AS-EQ1.

which leads me to my own question. if the subs are the same (brand/model), would EQ still be needed?  ???
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 25, 2011, 00:17
technically Yes as they are active each should have they own Eq , just like Multi CH speaker.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 25, 2011, 00:20
Need advise fm expert here, can I mix match differend brand sub, I hv jl 112 wish add one sub, ideally will be another f 112 but budget constraint tink of rythmik 12 ich. Pls comment.

what you want to achieve out of it by adding a F12  ???
Title: Re: Official Rythmik Subwoofer Thread
Post by: Old school on November 25, 2011, 10:04
One I good, but two is better, felt one Sub overwork.
With two hope to even out the bass. Less constraint.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 25, 2011, 11:41
One I good, but two is better, felt one Sub overwork.
With two hope to even out the bass. Less constraint.

Than the best is to get another F112 or sell yr 112 and go for 212.
F12 can't  do what F112 can.
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on January 15, 2012, 23:14
For new owners of the FV15HP, beware of the weight when you receive it... it's as heavy as my old SVS PB 12+...

At 120 lbs it is best to have a friend handy, or if you are alone like me, make sure you use the "skate boards" provided...

If others have some settings they use, please post them here... cheers...
Title: Re: Official Rythmik Subwoofer Thread
Post by: chaotic on January 28, 2012, 11:27
i have a f12. what is the default common settings? the dials at the back has so many options. i was told how to adjust at the shop but i forgot how to since i didnt have time to play around until now.
Title: Re: Official Rythmik Subwoofer Thread
Post by: tane0019 on January 28, 2012, 17:46
i have a f12. what is the default common settings? the dials at the back has so many options. i was told how to adjust at the shop but i forgot how to since i didnt have time to play around until now.

Frankly speaking, I also agar agar only.  Maybe all the sub guru can advise & comments (in as layman term as possible   8) )

Below is currently what I set - to start the ball rolling  ;D

(http://i1121.photobucket.com/albums/l511/tane0019/Presentation1.jpg)

1) Parametric equalization = OFF.

2) Crossover = 120Hz

3) Bass Extension Filter = 20Hz + High

4) Low Pass Slope Setting - AVR/12 (I think this push whole range of freq to the sub, right ?).
Title: Re: Official Rythmik Subwoofer Thread
Post by: chaotic on February 03, 2012, 22:21
thanks for the guide. i recently changed cable from avr to sub - one input to two input. it sounds better with more oomph
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on February 03, 2012, 22:53
It seems the Rhythmiks do not have an auto-off function?
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on February 04, 2012, 06:54
Some settings a avs forum member shared:
ere are my settings and notes I have on why I chose them.

Low Pass - EXT/12 - Use when using XO in AVR.

Rumble Filter - On - Excursion protection.

Freq - 14 - Lowest freq extension.

Damping - Low - I have in my notes that Hi Damping extends the LF curve further. I'm not sure if this is correct or the wrong way around. If it is correct I don't know why I selected Low.

On the Damping I will do some testing with my Omnimic. Hopefully someone can comment and set us straight.

With the PEQ it is best used to tame a peak than boost a null. You would need some freq measuring equipment to do this.

I set the gain to 12 o'clock and make further level adjustments in the AVR.

The LP filter should be set to max if using the XO in the AVR.

With phase adjustment ideally use measuring equipment or your ear. This is after setting the distance in your AVR.
Title: Re: Official Rythmik Subwoofer Thread
Post by: r0n1n31 on February 04, 2012, 07:58
hi pete, with this settings, did it solved your bass issue? i've read your thread
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on February 04, 2012, 18:22
hi pete, with this settings, did it solved your bass issue? i've read your thread
Bro these are just settings from the net. You can start with them and TUNE accordingly to your needs.

It is very important that you do not simply copy anyone's settings, after starting with whatever settings, you will need to adjust to your own needs. Cheers
Title: Re: Official Rythmik Subwoofer Thread
Post by: Mikeyz on February 04, 2012, 19:46
Hi all Rythmik sub owners,
I want to seek advice here. I just brought my F12 and i am using the QED PSW cable. I want to know is the Y terminated cables that people said would + 3db really would make the difference??
I am new to HT as i am trying to learn and understand every bit of my equipment. Thanks
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on February 04, 2012, 22:44
I use a subwoofer cable with two connectors. You can always buy a short y-cable and try it out.
Happy with my Audioquest cable which I bought some years ago at a clearance sale.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Mikeyz on February 04, 2012, 23:29
Thanks Pete, i'll give it a try but Y cables don't come cheap tho.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on February 05, 2012, 01:01
That is no sonic dif by using both input , just get a higher input level that all  ,as this L+ R input was mixed before it send to the processing /Amp.

That say , if you hv a Y cable use it , if not just connect to 1 input can do.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Mikeyz on February 05, 2012, 15:27
That is no sonic dif by using both input , just get a higher input level that all  ,as this L+ R input was mixed before it send to the processing /Amp.

That say , if you hv a Y cable use it , if not just connect to 1 input can do.

Yea what you say is very true as i have read others saying is no diff in bass quality when using them but this debate was never ending and retailers wll always say is good to use the Y cable to get the best of my F12.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Mikeyz on February 05, 2012, 15:30
I would like to ask fellow Rythmik sub owners out there, do you guys use aftermarket power cords or just settled with the cord that was originaly provided?
Title: Re: Official Rythmik Subwoofer Thread
Post by: francis wu on February 05, 2012, 15:47
IMO, if you have the means, indulge ;D

Otherwise, don't waste your hard earned moolas!..... :P
Title: Re: Official Rythmik Subwoofer Thread
Post by: r0n1n31 on February 05, 2012, 22:58
Bro these are just settings from the net. You can start with them and TUNE accordingly to your needs.

It is very important that you do not simply copy anyone's settings, after starting with whatever settings, you will need to adjust to your own needs. Cheers

oh okay, not a rythmik user  ::)  just asking if these settings solved your bass issue  ;)
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on February 05, 2012, 23:02
oh okay, not a rythmik user  ::)  just asking if these settings solved your bass issue  ;)

Actually the same principle applies for all suggested settings, start with them and tune accordingly.
As for my sub, the journey continues, but we are getting closer with each step...
Just very grateful for the many helpful members in our forum.
Title: Subtuner applet
Post by: petetherock on February 05, 2012, 23:12
BTW, there is cool app to get the phase right:
http://www.rythmikaudio.com/subtuner2.html

Title: Re: Official Rythmik Subwoofer Thread
Post by: fx on February 09, 2012, 14:42
Bad news from avsforum for new Rythmik owner.

upcoming price adjustment

--------------------------------------------------------------------------------

I hate to break this news. We have kept our price for over 3 years now and over these years, the price of parts in our subs has kept increasing. We absorbed all of it. However, the pricing on the new amplifiers has come to the point that we need to adjust the price. Basically, we need to increase the price of all subs by $75 to $100, except FV12. But you know that we have put FV12 on sale for sometime now. We may revert it back to original price. As for the pricing of amplifiers, they will go up by $30 for A370 amps and $40 for H600. We will allow a week of grace period after the announcement.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Mikeyz on February 10, 2012, 18:20
Bad news from avsforum for new Rythmik owner.

upcoming price adjustment

--------------------------------------------------------------------------------

I hate to break this news. We have kept our price for over 3 years now and over these years, the price of parts in our subs has kept increasing. We absorbed all of it. However, the pricing on the new amplifiers has come to the point that we need to adjust the price. Basically, we need to increase the price of all subs by $75 to $100, except FV12. But you know that we have put FV12 on sale for sometime now. We may revert it back to original price. As for the pricing of amplifiers, they will go up by $30 for A370 amps and $40 for H600. We will allow a week of grace period after the announcement.

This is very true cause i had spoken with the distributor agent for Rythmik in Malaysia and their new shipment will have price increament from RM150-300 depending on sub model, for amp wise stocks are very limited at the moment due to price hike on compenents.
Title: Re: Official Rythmik Subwoofer Thread
Post by: fx on February 11, 2012, 16:15
Bought fv15hp last week from bro sdds  to compare with my hsu vtf15h. Wow, the bass more tighter and deeper and overall control is better. The 15" woofer, amplifier plate and built looks fantastic. Am using hsu mbm12 too and both subs were connected to Oyaide Tunami power cord with Qed reference sub cable.and isolation pads. Selling at US1199 with this quality of built and performance, considered very value for money.

Vtf15 is very good sub too for the price and size. Anyway, i've received overwhelming sms when I put out for sale and was reserved within 15mins. Hope bros of rythmik user having fun too. Cheers!
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on February 11, 2012, 17:17
Bought fv15hp last week from bro sdds  to compare with my hsu vtf15h. Wow, the bass more tighter and deeper and overall control is better. The 15" woofer, amplifier plate and built looks fantastic. Am using hsu mbm12 too and both subs were connected to Oyaide Tunami power cord with Qed reference sub cable.and isolation pads. Selling at US1199 with this quality of built and performance, considered very value for money.

Vtf15 is very good sub too for the price and size. Anyway, i've received overwhelming sms when I put out for sale and was reserved within 15mins. Hope bros of rythmik user having fun too. Cheers!

Did you connect your MBM12 to the HPF out of FV15HP ? if not try it and will give you better integration of 2 sub.
You sold yr VTF-15H ? am looking for one that used for a year or more.
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on February 11, 2012, 18:38
Bought fv15hp last week from bro sdds  to compare with my hsu vtf15h. Wow, the bass more tighter and deeper and overall control is better. The 15" woofer, amplifier plate and built looks fantastic. Am using hsu mbm12 too and both subs were connected to Oyaide Tunami power cord with Qed reference sub cable.and isolation pads. Selling at US1199 with this quality of built and performance, considered very value for money.

Vtf15 is very good sub too for the price and size. Anyway, i've received overwhelming sms when I put out for sale and was reserved within 15mins. Hope bros of rythmik user having fun too. Cheers!
Are you saying the FV15HP is tighter than the Hsu VTF15?
Title: Re: Official Rythmik Subwoofer Thread
Post by: fx on February 11, 2012, 21:06
Did you connect your MBM12 to the HPF out of FV15HP ? if not try it and will give you better integration of 2 sub.
You sold yr VTF-15H ? am looking for one that used for a year or more.

Both subs were connected thru antimode 8033c. Xover out for mbm12 and xover in for fv15hp.
So far, am very happy with it. Vtf15 hard to come-by.

Are you saying the FV15HP is tighter than the Hsu VTF15?

Yup,  after tested for a day and there's no turning back. These 2 subs combined gave you rumble and chest-thumping.
I used in dedicated room size 3.5m by 3.7m with 4pcs of echo bassbuster at 4 corners.
Title: Re: Official Rythmik Subwoofer Thread
Post by: jackmbox on February 12, 2012, 14:05
Anyone using Auralex for FV15HP? Which model (or combination of models) do you use? I saw the Great Gramma but slightly larger than the base of FV15HP. Could use 2 X Gramma not sure if its recommended? Any advise would be appreciated. :D
Title: Re: Official Rythmik Subwoofer Thread
Post by: alvin1118 on February 12, 2012, 14:36
Any Bro.placing sub beside sofa? I listened to a HT with sub beside sofa,it was awesome
Title: Re: Official Rythmik Subwoofer Thread
Post by: fx on February 12, 2012, 21:52
Anyone using Auralex for FV15HP? Which model (or combination of models) do you use? I saw the Great Gramma but slightly larger than the base of FV15HP. Could use 2 X Gramma not sure if its recommended? Any advise would be appreciated. :D

I used Auralex Gramma for my mbm12 but it slightly larger and Elemental Design custom made pad for fv15hp with perfect fit. I'd prefer great gramma than gramma for fv15hp. With pad, bass more cleaner, tighter, less vibration and resonant.
Title: Re: Official Rythmik Subwoofer Thread
Post by: jackmbox on February 13, 2012, 12:54
I used Auralex Gramma for my mbm12 but it slightly larger and Elemental Design custom made pad for fv15hp with perfect fit. I'd prefer great gramma than gramma for fv15hp. With pad, bass more cleaner, tighter, less vibration and resonant.

wow I use SubDude HD for my mbm12 and the front/back slightly out. but it can still stand on it with spikes. Anyway thanks for the reply :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: jackmbox on February 14, 2012, 14:42
It has begun:

"After absorbing cost increase for the past 3 years, we have finally made the painful decision to raise the prices. To ease the transition to new pricing, we offer a grace period for old pricing until Feb 18. The prices below reflect the ones after the increase. But the prices in the shopping cart are still be the old ones until Feb 18. "

Order quick before its too late. Price increase for FV15HP black oak black cone is usd$75 while piano black is usd$100.

Title: Re: Official Rythmik Subwoofer Thread
Post by: badbad2000 on February 16, 2012, 18:21
hi, i just got a F12SE. can recommend me a Y cable to buy and my sub current no feet, should I get 1?
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on February 16, 2012, 18:48
I use 8 model 5 vibrapods under my FV15HP. Happy with it.
Title: Re: Official Rythmik Subwoofer Thread
Post by: badbad2000 on February 17, 2012, 00:49
I use 8 model 5 vibrapods under my FV15HP. Happy with it.
Where you bought it? what is the damage?
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on February 17, 2012, 04:08
Where you bought it? what is the damage?
Amazon.. You can ship them via vpost, I got them in USA.
Title: Re: Official Rythmik Subwoofer Thread
Post by: fx on February 17, 2012, 16:45
My friend bought the other FV15HP from sdds and was very satisfied after compared to his previous SVS PC13 Ultra, he said FV15HP bass is tighter, cleaner and deeper.  ;D


Picture of my FV15HP
(http://i38.photobucket.com/albums/e146/edwinteobt/058.jpg)



Title: Re: Official Rythmik Subwoofer Thread
Post by: Yubaba on February 18, 2012, 08:11
PC ultra is only 13 inch woofer and FV15HP is 15 inch
Size does matter
Title: Re: Official Rythmik Subwoofer Thread
Post by: maomao82 on February 27, 2012, 01:22
My friend bought the other FV15HP from sdds and was very satisfied after compared to his previous SVS PC13 Ultra, he said FV15HP bass is tighter, cleaner and deeper.  ;D


Picture of my FV15HP
(http://i38.photobucket.com/albums/e146/edwinteobt/058.jpg)

Bro fx, where can get the foam like material under yr FV15P.. seems solid despite the weight of the SUB it supports.. wats the dmg like?





Title: Re: Official Rythmik Subwoofer Thread
Post by: r0n1n31 on February 27, 2012, 07:31
Bro fx, where can get the foam like material under yr FV15P.. seems solid despite the weight of the SUB it supports.. wats the dmg like?

that's ED custom made pad, he mentioned it from his last previous post. Do check the previous MO by bro NCMK, the price is listed there:

http://www.xtremeplace.com/yabbse/index.php?topic=93044.45

 
Title: Re: Official Rythmik Subwoofer Thread
Post by: fx on February 27, 2012, 09:55
that's ED custom made pad, he mentioned it from his last previous post. Do check the previous MO by bro NCMK, the price is listed there:

http://www.xtremeplace.com/yabbse/index.php?topic=93044.45


bro r0n1n31, thank for the input.



bro mao, dimension 19.5" x 27.5"x 4". The  3/4″ thick high density wood is really solid & heavy.
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on May 05, 2012, 08:52
Just some rule of thumb settings from the maker:
http://www.avsforum.com/avs-vb/showthread.php?p=21960893#post21960893 (http://www.avsforum.com/avs-vb/showthread.php?p=21960893#post21960893)

rumble filter and roomEQ
I'd like to make this clear so that customers don't make mistakes

For sealed subs, turn off rumble filter and set the extension to 14hz/ mid damping before running roomEQ such as Audyssey.

For vented subs with single tuning, set the extension filter to 14hz, low damping before running roomEQ.

For vented subs with dual tuning, plug one port and set the rumble filter to OFF/1, and 14hz low damping before running room EQ.

After the roomEQ is done, you can then play with extension filter and rumble filter setting.

The precaution is to avoid roomEQ accidentally boost frequency below 20hz which can defeat the purpose of having those controls on our amps.This maybe counterintuitive but it is important (because one may think he should use the settings that he wants to use when doing roomEQ). If roomEQ has its way in correcting frequency response, it will undo all the rumble filter, and extension filter setting

And this will also help: http://www.rythmikaudio.com/subtuner2.html
Title: Re: Official Rythmik Subwoofer Thread
Post by: planet on May 12, 2012, 09:38
Any idea can we get the sub from local as I checked the Rythmik website only stated the
South East Asis dealer at Malaysia Sarawak (Sound Fusion)but can't find Singapore dealer.The website link
as follow

http://www.rythmikaudio.com/contact.html#sound_fusion


Sound Fusion
Lot 115, Crown Square
No.88, Jalan Pending
93450 Kuching, Sarawak.
Malaysia
Tel: +6 082-338 020, +6 017-808 9020

Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on May 12, 2012, 09:47
You can approach Peng aka Econav (nick) locally.
Title: Re: Official Rythmik Subwoofer Thread
Post by: planet on May 12, 2012, 09:57
You can approach Peng aka Econav (nick) locally.

Brother, is Econav is the official Singapore dealer ? But how come
is not stated at the Rythmik website ? How about the warranty if I get
from him ? Or Econav is appionted Singapore distributor by Sound Fusion?
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on May 12, 2012, 11:11
http://www.xtremeplace.com/yabbse/index.php?topic=110334.msg790084#msg790084
Title: Re: Official Rythmik Subwoofer Thread
Post by: planet on May 12, 2012, 11:25
http://www.xtremeplace.com/yabbse/index.php?topic=110334.msg790084#msg790084

Bro, thanks!! Will contact Econav .
Title: Re: Official Rythmik Subwoofer Thread
Post by: junwei on May 12, 2012, 11:50
Sound Fusion Sdn Bhd is the SEA distributor.
Econ-AV will be your local Singapore dealer.
You can always drop in their showroom to have a chat with Peng and get a demo done.
Any problem, you can always get your warranty claim locally.

Regards,
 junwei
 Sound Fusion Sdn Bhd
 Kuching, Malaysia.
Title: Re: Official Rythmik Subwoofer Thread
Post by: planet on May 14, 2012, 13:13
Singapore dealer is updated on Rytkmik website

http://www.rythmikaudio.com/contact.html#ECON_AV

ECON AV CONCEPTS PTE LTD
1 Coleman Street
#01-20 The Adelphi
Singapore 179803
Tel: 6259 3264/HP 9119 7618
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on May 15, 2012, 00:32
Thanks to planet and junwei for updating our contact and link.

We are pleased to inform that as of now, we have the F12SE, F15SE, F15HP, D15SE, FV15HP, E15 and E15HP for audition at one go.
Kindly note that the warranty is 2 yrs local for Electronics and 5 yrs for drivers (parts are all 1 to 1 replacement) and during the first yr, we will do the replacement onsite (Monday-Friday 12noon-5pm).

Also, we wish to update you that we will be bringing in the New FV12 and possibly, a target price of S$1000/- very soon.

Thanks to all the customers who have purchased the RYTHMIK range of subwoofers.

Peng
Title: Official Rythmik Subwoofer Thread
Post by: Doggie Howser on May 15, 2012, 07:47
Congrats.
Title: Re: Official Rythmik Subwoofer Thread
Post by: chamay on June 20, 2012, 00:25
Had been busy for the past days tuning here and there on my E15.

However there are some settings which i am quite confused.

I calibrated my speakers and sub my using onkyo 818 multEQ xt 32. I read up those faqs on audyssey on it mentioned it is best to use LFE in of the sub whereas possibe rather than line in. (So I connected my AVR to LFE in of my rythmik).

I did the calibration using this setting.
I connected by a single RCA belden cable

PEQ is set to OFF.

Under the LINE IN option
DELAY/PHASE is 0 and CROSSOVER is 80Hz
But since i connect thru LFE in, doesn't matter on this setting rite?

Volume is about 10 o clock in order for me to acheive 75 dB when i run audyssey for the subwoofer.

Under the Subwoofer option.
I set to 80hz/24...(I assumed that also doesnt matter as it only when LINE IN use)

Rumble filter i set to ON.
After reading petetherock post, i believe i should have turn it off when i run audyssey , am i right?

Under the EXTENSION FILTER
The FREQ i set to 14hz and Damping i set to High
 Should i set to mid damping when i run audyssey again

By the way, it is better to get a y connector for my LFE input or it is better to use line in rather than LFE in?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on June 20, 2012, 00:39
Had been busy for the past days tuning here and there on my E15.

However there are some settings which i am quite confused.

I calibrated my speakers and sub my using onkyo 818 multEQ xt 32. I read up those faqs on audyssey on it mentioned it is best to use LFE in of the sub whereas possibe rather than line in. (So I connected my AVR to LFE in of my rythmik).
If you are new to this , just use the LFE and let yr AVR do the rest , as when using LFE some of the setting on the E15 will be bypass , so if there is a delay you are not able to correct it ,as you can ask around , the auto calibration can do alot of things but not everythings.

I did the calibration using this setting.
I connected by a single RCA belden cable

PEQ is set to OFF.

Under the LINE IN option
DELAY/PHASE is 0 and CROSSOVER is 80Hz
But since i connect thru LFE in, doesn't matter on this setting rite?
When you use LFE as input ,the above will be bypass.
Volume is about 10 o clock in order for me to acheive 75 dB when i run audyssey for the subwoofer.

Under the Subwoofer option.
I set to 80hz/24...(I assumed that also doesnt matter as it only when LINE IN use)

Rumble filter i set to ON.
After reading petetherock post, i believe i should have turn it off when i run audyssey , am i right?
Set it to off only when you doing calibration , after that turn to On when done.

Under the EXTENSION FILTER
The FREQ i set to 14hz and Damping i set to High
 Should i set to mid damping when i run audyssey again
Set to mid when doing calibration.

By the way, it is better to get a y connector for my LFE input or it is better to use line in rather than LFE in?
Not a must , as it only give you and higher input signal and that all.
Title: Re: Official Rythmik Subwoofer Thread
Post by: audiovideo on June 21, 2012, 13:14
I'm going to get marantz SR6006
front speakers are whafedale diamond 9 bookself
current subwoofer is whafedale sw150
centre is whafedale diamond 9.CS
setup in the living room, area 5m x 4m x standard HDB ceiling height

should I get the Rythmik F15 or E15?
Music and HT 50/50
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on June 21, 2012, 13:43
I'm going to get marantz SR6006
front speakers are whafedale diamond 9 bookself
current subwoofer is whafedale sw150
centre is whafedale diamond 9.CS
setup in the living room, area 5m x 4m x standard HDB ceiling height

should I get the Rythmik F15 or E15?
Music and HT 50/50


F15 is larger you need W=20" and D=22" to house it.
E15 smaller at 18" x 20" . so is more easy in setup , but taller and -1db less Spl.
the best is you just take a look at both.
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on June 21, 2012, 14:30
bro av
Listen to Bro Peng... he knows what he is talking about... respect and it's not just size..
IMO, I could have used a F15HP or even the D15 times two...
Title: Re: Official Rythmik Subwoofer Thread
Post by: chamay on June 21, 2012, 18:25
My living room is almost the same as av , 5m x 5m . I am using E15 mainly due to the size and the attractive pricing . My sub is still in running in stage  ..

By the way , any good isolation pad to recommend , I don't mind paying more to get aural ex or using fridge support like what Pete had done .. But I thought fridge support is usually those concrete type right ?

Currently I  placing my sub on a small mat and don't want to disturb my neighbour downstairs
Title: Re: Official Rythmik Subwoofer Thread
Post by: synthesis on June 21, 2012, 18:41
Currently I  placing my sub on a small mat and don't want to disturb my neighbour downstairs


Then just turn down the volume. It's the soundwave rather than physical contact with the floor.
Title: Re: Official Rythmik Subwoofer Thread
Post by: chamay on June 21, 2012, 23:11


Then just turn down the volume. It's the soundwave rather than physical contact with the floor.

I don't play extremely loud .. At most 60 ~ 65 % of the volume , there are some scenes that are quite good LFE like the first attack from master and commander . It really caught me off guard ..

During the audyssey calibration , I set my sub to 75 dB and the knob is just at 10 O clock .

Title: Re: Official Rythmik Subwoofer Thread
Post by: luq_skywalker on September 10, 2012, 10:33
Good morning brudders  :)

I received my F15 from bro Peng about a month back. I've been reading alot on the SW settings, placement etc etc in XP forum and external forums. With alot of recommendations to connect the sub via LFE in from the AVR to let AVR manage the crossovers, it prompted me to shift from connecting via Line In to LFE in. Problem is when I do the calibration and connect it via LFE in instead from my AVR, I don't get any output. The level is in the -50s dB, i suspect it's coming from the ambience. But once I switch the 2 RCAs to Line in, the output immediately comes, the test tone is obvious and the output level goes up to 80db. My current setup and setting :

Eq Setup
AVR : Denon 4311
SW : F15 PEQ3
IC :  Split (1>2) Canare 4s8 cable

SUb Setting
- Low pass switch set to EXT/12 (not 80Hz/24).
- PEQ (Parametric EQ) : Off
- PEQ Gain : doesn't matter with PEQ set to Off
- PEQ Bandwidth : doesn't matter with PEQ set to Off
- PEQ Frequency : doesn't matter with PEQ set to Off
- Delay adjustment : 0 (to be adjusted by AVR).
- Crossover adjustment : max (to be gradually dial down for best integration)
- Volume Level : 12 o'clock  (to gradually move higher to balance SW with front speakers)
- Extension filter switch: 14Hz
- Damping switch: High.
- Rumble filter : OFF for calibration and ON back once done

AVR Setting
- Front speakers Small
- Bass mgmt : LFE only (not LFE + Main)
- LPF for LFE : 120Hz

With Bro Peng's advice, I was tweaking with it the weekend but still no output like the Line in. Can it be that somehow the LFE in has some disconnection somewhere because there's really no sound coming out of it, not even a little. Any advice how can I troubleshoot this? A simple switch between the 2 RCA's from LFE in to LINE in for me have shown tremendous day & night difference. I've visited many forums, cannot seem to find answer. Thank you brothers, hope to get some insight from the rest

Luke
Title: Re: Official Rythmik Subwoofer Thread
Post by: diesel123 on September 10, 2012, 10:50
Hi, U should contact bro Peng for more answer. I am sure he will gladly help! :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: luq_skywalker on September 10, 2012, 22:20
Hi, U should contact bro Peng for more answer. I am sure he will gladly help! :)

Thanks bro D. Actually throughout the weekend bro Peng has been advising me on troubleshooting via sms, he too couldnt wrap his finger around the issue.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sdds on September 10, 2012, 22:34
Bro e mail yr problem to Brian . Should he is able to solve the problem .
Title: Re: Official Rythmik Subwoofer Thread
Post by: luq_skywalker on September 10, 2012, 22:40
Thanks everyone, my problem is now old news though  :) the fairy came and wave his magic wand to fix the issue  ;D

Actually THE Man, bro Peng himself came to look up the problem and fix it with two shakes of a jiffy  :). Not only that he came to fix the problem, he help me tune the setting to get that 'THUMP' on the chest. He also gave me alot of potential tweaking tips to my current setup.

This is what I like doing business with local SMEs, won't get this if I were to just buy off the internet. Excellent service including follow ups to close the loop, something that I appreciate especially in times when I needed help most. Thanks so much bro Peng, enjoying the Pacific right now. Feels like an upgrade from the old Jubilee cinema to the new Grand Cathay.

Thanks bro Peng  :D
Title: Re: Official Rythmik Subwoofer Thread
Post by: luq_skywalker on September 10, 2012, 22:42
Bro e mail yr problem to Brian . Should he is able to solve the problem .

Thanks bro SDDS, the local bass shifu already came to 'bless' my F15
Title: Re: Official Rythmik Subwoofer Thread
Post by: petetherock on September 10, 2012, 22:47
Thanks everyone, my problem is now old news though  :) the fairy came and wave his magic wand to fix the issue  ;D

Actually THE Man, bro Peng himself came to look up the problem and fix it with two shakes of a jiffy  :). Not only that he came to fix the problem, he help me tune the setting to get that 'THUMP' on the chest. He also gave me alot of potential tweaking tips to my current setup.

This is what I like doing business with local SMEs, won't get this if I were to just buy off the internet. Excellent service including follow ups to close the loop, something that I appreciate especially in times when I needed help most. Thanks so much bro Peng, enjoying the Pacific right now. Feels like an upgrade from the old Jubilee cinema to the new Grand Cathay.

Thanks bro Peng  :D

Good stuff, post your settings, that way everyone can learn...
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 10, 2012, 23:04
No , dont use his setting , I just do it temporary just to add some punch , as luke's spk placement and sitting position make up like a sq room, and lot of reflection have to deal with before a acceptable sounding can achieve.

Luke ,
Sorry , as i can't stay long  , Please move yr spk out by another 1ft and possible move the sofa out of the sq , see can tighten further ( for now before nick do sound chk ).
Title: Re: Official Rythmik Subwoofer Thread
Post by: luq_skywalker on September 10, 2012, 23:16
No , dont use his setting , I just do it temporary just to add some punch , as luke's spk placement and sitting position make up like a sq room, and lot of reflection have to deal with before a acceptable sounding can achieve.

Luke ,
Sorry , as i can't stay long  , Please move yr spk out by another 1ft and possible move the sofa out of the sq , see can tighten further ( for now before nick do sound chk ).

Thanks bro Peng for even coming despite your busy schedule, i know you were inbetween projects and appointments, it made my day and night. Shifu has spoken, considerate as ever so not as to upset everyone else's setting. Thanks bro Pete for the reminder though, we should always share info. Like what bro Peng and Pete always say, the settings are dependable on the environment. Never hurt to try but remember to take a photo of ur settings so you can go back.

SUb Setting with LFE in (yeaaah, finally man !)

- PEQ (Parametric EQ) : On
- PEQ Gain : 7 o'clock
- PEQ Bandwidth : 1 o'clock
- PEQ Frequency : 4 o'clock
- Delay adjustment : 0 (to be adjusted by AVR).
- Crossover adjustment : 80 (adjust incrementally for best integration)
- Volume Level : 1 o'clock  (to gradually move higher to balance subwoofer with front speakers)
- Low pass switch set : 80Hz/24
- Rumble filter : ON
- Extension filter freq: 14Hz
- Damping switch: low

Enjoy :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: audiovideo on September 19, 2012, 08:18
can pay by credit card? any extra charge?
Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on September 28, 2012, 11:36
hi, has been following the rytjmik threads.. interested to get F15/E15
but seems like some models are out of stock
possible to update what are the models available now and when will those out of stock be available?
thanks
Title: Re: Official Rythmik Subwoofer Thread
Post by: diesel123 on September 28, 2012, 12:43
Contact peng 96387418 aka econav for the subs
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 28, 2012, 15:34
hi, has been following the rytjmik threads.. interested to get F15/E15
but seems like some models are out of stock
possible to update what are the models available now and when will those out of stock be available?
thanks
hi , we still have few stock of F15 @ $1899 and F12 @ $1599 each .
the next production run will be the E15 and FV15HP ready by Nov.
Peng
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 28, 2012, 15:36
Contact peng 96387418 aka econav for the subs

thanks , asked few to call you for the HDMI cables.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Cedric on October 02, 2012, 11:46
Hi, I'd like to check what is the price for F12SE with silver cone? Thanks!
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 02, 2012, 13:14
Hi, I'd like to check what is the price for F12SE with silver cone? Thanks!

Sorry, not bringing in the silver cone version anymore.
Title: Re: Official Rythmik Subwoofer Thread
Post by: audiovideo on October 02, 2012, 13:19
will there be an MO for E15  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: tane0019 on October 02, 2012, 15:32
Sorry, not bringing in the silver cone version anymore.

Hi Peng,

My unit speaker net got 2 small holes - you side do "re-netting" ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 03, 2012, 00:29
Hi Peng,

My unit speaker net got 2 small holes - you side do "re-netting" ?

your should be the see thru type right ? No longer use this for new production as can torn easily .
If you want DIY can use latex .
Title: Re: Official Rythmik Subwoofer Thread
Post by: tane0019 on October 03, 2012, 10:58
your should be the see thru type right ? No longer use this for new production as can torn easily .
If you want DIY can use latex .

"See Through Type" - should be, black in color + I think quite thin in thickness (as comparing to the netting from front speakers).

What then is being use for the new unit ?

Latex ???  What is this ?  Rubber sheet ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: audiovideo on November 04, 2012, 20:38
hi , we still have few stock of F15 @ $1899 and F12 @ $1599 each .
the next production run will be the E15 and FV15HP ready by Nov.
Peng

Any news on the E15?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on November 04, 2012, 23:48
Maybe you can contact peng directly. His number is right above in the thread.
One of my buddy just got his E15 couple of weeks ago.
Title: Re: Official Rythmik Subwoofer Thread
Post by: badbad2000 on December 06, 2012, 12:25
anyway to mod the rythmik sub to auto-standby?  if turn on but not playing anything, does it consume a lot power?
Title: Re: Official Rythmik Subwoofer Thread
Post by: audiovideo on December 06, 2012, 21:20
still waiting for E15 stock ready ... :D
Title: Re: Official Rythmik Subwoofer Thread
Post by: mkwglyg on December 17, 2012, 18:08
Looking forward to buy the FV12. Any stock?
wonder why there's little interest in this ported model
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on December 17, 2012, 19:07
Looking forward to buy the FV12. Any stock?
wonder why there's little interest in this ported model

Sorry , we are not bring in this model.
We only have F12 Black Oak $1499 and Glossy Black $1799 to offer for 12"
Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on December 17, 2012, 20:28
at last manage to "hand carry" F12 back bome
only the Ssangyong cab or bigger can take the big box
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on December 17, 2012, 22:09
at last manage to "hand carry" F12 back bome
only the Ssangyong cab or bigger can take the big box

You are the one, :)
The normal blue cab can do laio , follow the step i written on the box will save you all the trouble , text me when you need help ;)
Title: Re: Official Rythmik Subwoofer Thread
Post by: francishuang on December 17, 2012, 22:42
at last manage to "hand carry" F12 back bome
only the Ssangyong cab or bigger can take the big box

Good old Toyota crown can
Title: Re: Official Rythmik Subwoofer Thread
Post by: gchuva on January 08, 2013, 22:50
Any rythmik sub owners that have a gloss black sub out there that would let see their set up?  I am considering moving to Rythmik but need to show wife how it looks.  Must be gloss black.  Thanks
Title: Re: Official Rythmik Subwoofer Thread
Post by: chamay on January 08, 2013, 23:18
How about a visit to econav shop at Adelphi ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: Cedric on January 08, 2013, 23:31
Any rythmik sub owners that have a gloss black sub out there that would let see their set up?  I am considering moving to Rythmik but need to show wife how it looks.  Must be gloss black.  Thanks
I have the glossy black F12, staying at Elias Road, can pop by if you are near.

Cheers!
Title: Re: Official Rythmik Subwoofer Thread
Post by: gchuva on January 09, 2013, 00:22
How about a visit to econav shop at Adelphi ?

If Peng could let me know if he has any in stock, that would be great.  Thanks
Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on January 09, 2013, 11:05
black oak also not bad  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: BUGSY on January 09, 2013, 11:22
If Peng could let me know if he has any in stock, that would be great.  Thanks

Contact peng 96387418 aka econav
Title: Re: Official Rythmik Subwoofer Thread
Post by: abyors on August 04, 2013, 07:28
Hi guys,

I've just gotten myself an F12. Been playing movies with my system and what I noticed is that I can feel the bass 'thump' effect but somehow I cannot get the 'rumble' effect. My HT setup is as follows:

Energy Take Classic 5 (satellite speakers)
Denon AVR 3312

It could be my configuration but I'm not sure whether I need to enable something on the sub to get the rumble. Any advice appreciated.

Thanks!
Title: Re: Official Rythmik Subwoofer Thread
Post by: francishuang on August 04, 2013, 07:40
Increase the gain of the sub volume in avr slowly by .5 db at a time. Reach the db level just before u feel the sub become boomy or sluggish. Not a absolute fix, but it will help a little
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 04, 2013, 12:35
Hi guys,

I've just gotten myself an F12. Been playing movies with my system and what I noticed is that I can feel the bass 'thump' effect but somehow I cannot get the 'rumble' effect. My HT setup is as follows:

Energy Take Classic 5 (satellite speakers)
Denon AVR 3312

It could be my configuration but I'm not sure whether I need to enable something on the sub to get the rumble. Any advice appreciated.

Thanks!

Try the following,
input= line/LEF ( depand on version )
PEQ = OFF
Freq = 80-100 Hz
Phase = 0
levelgain =12-1ock

stwitch
LEF/80Hz
rumble off
14Hz
Low

follow by AVR auto eq

Title: Re: Official Rythmik Subwoofer Thread
Post by: abyors on August 04, 2013, 18:33
Try the following,
input= line/LEF ( depand on version )
PEQ = OFF
Freq = 80-100 Hz
Phase = 0
levelgain =12-1ock

stwitch
LEF/80Hz
rumble off
14Hz
Low

follow by AVR auto eq



Thanks Econav. I've tried the settings you've recommended but still no rumble.  Nothing in my room is shaking. It looks like the same issue that affected Pete. I've been reading up thread that for tips but no go at the moment.
Title: Re: Official Rythmik Subwoofer Thread
Post by: audiovideo on August 04, 2013, 18:39
to me, where the sub is placed could be the deciding factor  ;D ... 
Title: Re: Official Rythmik Subwoofer Thread
Post by: abyors on August 04, 2013, 19:01
to me, where the sub is placed could be the deciding factor  ;D ... 

I ran the following test http://www.youtube.com/watch?v=8_DqiSNqC9w and my whole room practically shook. Everything was rattling. Same sub positioning. But watching movies is a different story. Explosions has the thumps but no post-explosiom rumbles.

Can anything else be tweaked? Maybe the AVR?  With a sub this size there's only one place I can place the sub.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 04, 2013, 23:27
Thanks Econav. I've tried the settings you've recommended but still no rumble.  Nothing in my room is shaking. It looks like the same issue that affected Pete. I've been reading up thread that for tips but no go at the moment.

pete's setup have rumble and can be too much , what he last setup was lack of impact/punch .
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 04, 2013, 23:31
I ran the following test http://www.youtube.com/watch?v=8_DqiSNqC9w and my whole room practically shook. Everything was rattling. Same sub positioning. But watching movies is a different story. Explosions has the thumps but no post-explosiom rumbles.

Can anything else be tweaked? Maybe the AVR?  With a sub this size there's only one place I can place the sub.

check your AVR setting and bluray player setting and select the correct decoding format.
actually F12 can have more rumble than the punch , if test software and tone can rattle than the problem may come from the source.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ALTK on August 04, 2013, 23:32

Can anything else be tweaked? Maybe the AVR?  With a sub this size there's only one place I can place the sub.

I think avr's setting play a important part also.
Title: Re: Official Rythmik Subwoofer Thread
Post by: abyors on August 05, 2013, 00:05
check your AVR setting and bluray player setting and select the correct decoding format.
actually F12 can have more rumble than the punch , if test software and tone can rattle than the problem may come from the source.

The source could be the problem then. I'll check it out. Thanks for the tips. I noticed a marked improvement in the sub's performance using the settings you recommended earlier.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 05, 2013, 00:07
The source could be the problem then. I'll check it out. Thanks for the tips. I noticed a marked improvement in the sub's performance using the settings you recommended earlier.

That is good , which version is your F12 ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: abyors on August 05, 2013, 09:27
That is good , which version is your F12 ?

I'm not sure. Looks to be just with the first PEQ version. 2 years old.
Title: Re: Official Rythmik Subwoofer Thread
Post by: abyors on August 05, 2013, 13:57
Increase the gain of the sub volume in avr slowly by .5 db at a time. Reach the db level just before u feel the sub become boomy or sluggish. Not a absolute fix, but it will help a little

Missed your suggestion earlier. OK will try this. Thanks for the tip!
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 05, 2013, 23:11
I'm not sure. Looks to be just with the first PEQ version. 2 years old.

Than it should have more rumble than punch , but you can compensa from the PEQ adj control
Title: Re: Official Rythmik Subwoofer Thread
Post by: abyors on August 06, 2013, 06:40
Than it should have more rumble than punch , but you can compensa from the PEQ adj control

Thanks econav! Would you have some recommended settings I can start with? I'd love to try it out.
Title: Re: Official Rythmik Subwoofer Thread
Post by: CASH on November 26, 2013, 07:29
jus got myself the F12SE...
so many knobs and switches behind it!!!!
how do you guys tinker with the settings on this monster?
 ???
Title: Re: Official Rythmik Subwoofer Thread
Post by: badbad2000 on November 26, 2013, 08:34
jus got myself the F12SE...
so many knobs and switches behind it!!!!
how do you guys tinker with the settings on this monster?
 ???

You can download quick guide here

http://www.rythmikaudio.com/amplifiers.html


Sent from my Nexus 7 using Tapatalk 4

Title: Re: Official Rythmik Subwoofer Thread
Post by: CASH on November 26, 2013, 08:43
hehehehe!!!
looking at so many pictures of the back plate amp...
really confusing man..
never used a sub with so many stuff behind..
but so far i think its impressing me!
flick here, turn knob there and so on...
 :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: badbad2000 on November 26, 2013, 16:51
hehehehe!!!
looking at so many pictures of the back plate amp...
really confusing man..
never used a sub with so many stuff behind..
but so far i think its impressing me!
flick here, turn knob there and so on...
 :)

If you are using for HT, you don't need most of them. Your Onkyo 5010 XT32 will do the calibration.

Sent from my Nexus 7 using Tapatalk 4
Title: Re: Official Rythmik Subwoofer Thread
Post by: ahc3638 on November 26, 2013, 18:43
hehehehe!!!
looking at so many pictures of the back plate amp...
really confusing man..
never used a sub with so many stuff behind..
but so far i think its impressing me!
flick here, turn knob there and so on...
 :)
http://gr-research.com/a370peq.aspx
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on December 02, 2013, 23:52
Just pulled the trigger on F15HP, can't wait to get it home and rumble !!!!!

Bro, I thought u using the E15HP? haha...
Title: Re: Official Rythmik Subwoofer Thread
Post by: CASH on December 14, 2013, 17:56
okie, i decided to get diy belden with canare rca plugs from LHS.
7.5 meters. costs $36.50.
drilled two holes by the side wall at each end.
so now the sub is next to my sofa...
can feel the deep low rumblings in the sofa now.
i used a different power source. ( away from my avr )
next to my sofa...
i don't hear hum now, but can feel the bass cone vibrating even when my avr is off...
i need to get an electrician to come and redo wiring in my home.
the previous owner must have got a cheap electrician to do wiring..
damnit!!
 :'(
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on December 16, 2013, 18:06
okie, i decided to get diy belden with canare rca plugs from LHS.
7.5 meters. costs $36.50.
drilled two holes by the side wall at each end.
so now the sub is next to my sofa...
can feel the deep low rumblings in the sofa now.
i used a different power source. ( away from my avr )
next to my sofa...
i don't hear hum now, but can feel the bass cone vibrating even when my avr is off...
i need to get an electrician to come and redo wiring in my home.
the previous owner must have got a cheap electrician to do wiring..
damnit!!
 :'(


Please confirm at this location and using that power point as you indicated ,
1) RCA connected ( no hum , but cone moving ? )
2) without connect the RCA cable what happen ? any noise/cone move ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: CASH on December 16, 2013, 20:59
Please confirm at this location and using that power point as you indicated ,
1) RCA connected ( no hum , but cone moving ? )
2) without connect the RCA cable what happen ? any noise/cone move ?

1) RCA connected ( no hum , but cone moving ? )----very light hum detected, as well as very light vibration felt on fingertips when touching metal cone.
2) without connect the RCA cable what happen ? any noise/cone move ?----very, very,super light vibration felt on fingertips when touching metal cone.

when i switch the sub off ( on the sub's behind control panel itself ) no more vibration felt or hum heard...
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on December 16, 2013, 21:03
do you use/having a high power step down trans in yr setup ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: CASH on December 16, 2013, 21:08
i have a 1KV step down transformer in my bedroom..(overkill i know but i got it dirt cheap n made in japan some more!!!)
using it for my air purifier. ;D
my ht/stereo set up is located in the hall.
so totally different power points...
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on December 17, 2013, 12:37
totally unplug that step-down trans from the wall /13a point and test your F12.

1) with power on and No signal RCA connected ( Any hum and cone movement ? ) if no go to step 2
2) connect in RCA with power still ON ( Heard pop sound when you connect RCA ? now any hum ,cone move ? )

if 1 and 2 are No and softer/reduce than there are isuue of BEMF induced and get into your AC by that trans .
when 1 and 2 are same without the trans connected >> check polar of AC by using a test pen.
Title: Re: Official Rythmik Subwoofer Thread
Post by: CASH on December 17, 2013, 19:40
I am outside at the moment. Will try the troubleshooting when i am back.
Thanks for all the useful info.  :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: CASH on December 18, 2013, 09:10
totally unplug that step-down trans from the wall /13a point and test your F12.

1) with power on and No signal RCA connected ( Any hum and cone movement ? ) if no go to step 2
2) connect in RCA with power still ON ( Heard pop sound when you connect RCA ? now any hum ,cone move ? )

if 1 and 2 are No and softer/reduce than there are isuue of BEMF induced and get into your AC by that trans .
when 1 and 2 are same without the trans connected >> check polar of AC by using a test pen.

ok, with option 1, and 2,
the cone still has very light vibration...so a very very soft hum still is heard. (must put ear on cone to hear it )
i noticed there is 2 settings on the back of the sub,
limiter on and limiter off...
with limiter off, the cone moves forward( pushing out )
with limiter on, the cone goes in slightly (goes in )
even when i pull out the power cord from my onkyo, so there is no signal or power coming into the rca in, of sub,
there is the vibration felt in cone...
sad man...
any rythmic owners out there can do me a favour?
feel if your sub cone has vibration without any signal..
thanks.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on December 18, 2013, 13:45
ok, with option 1, and 2,
the cone still has very light vibration...so a very very soft hum still is heard. (must put ear on cone to hear it )
i noticed there is 2 settings on the back of the sub,
limiter on and limiter off...
with limiter off, the cone moves forward( pushing out )
with limiter on, the cone goes in slightly (goes in )
even when i pull out the power cord from my onkyo, so there is no signal or power coming into the rca in, of sub,
there is the vibration felt in cone...
sad man...
any rythmic owners out there can do me a favour?
feel if your sub cone has vibration without any signal..
thanks.

hum get in from the connected RCA /XLR cable even when you off your AVR.
The right way to test is,
1) power up your sub without connect any signal cable with level/vol on the sub set to min, what is the outcome ? ( if nothing than your sub may just function ok only and goto step 2 )
2) increase the level/vol/gain on the sub , what is the outcome? ( if increase also increase the hum within the sub when no cable is connected , likely internal pre/control circuit picked up from somewhere , if nothing than goto step 3)
3) now connect in your RCA cable and touch the center pin only without touching the outer ( ground/- ) , you should heard high low freq sound when vol/level/gain set a 1-3ock on the sub , when this is the case goto step 4.
4) now when you touch at the signal pin , also touch and hold tight on the casing/outer( ground/- ) , now you should heard very much reduced low freq sound and the harder you squeeze the outer case the less low freq sound , if so till this point your sub is 60% function well , if not your sub RCA input connector may hv issue or there is not grounded on the AC input to the sub ( check you 3pin plug , you can also try plug in the 3pin plug on that 13a wall point and use a screw drive to contact the E & R/N and if yr MCB/ELCB triped , you are 50% safe that is a ground , if not you really need to call in your electrician.................
Title: Re: Official Rythmik Subwoofer Thread
Post by: NEC on January 16, 2014, 20:36
Hi sifu rythmik , I have one f15hp subwoofer need some info regarding when I on the sub it got pop/clip sound is it normal ? I take out the RCA cable, and on the sub it also have pop/clip sound .thx in advance .
Title: Re: Official Rythmik Subwoofer Thread
Post by: servo 15 on January 17, 2014, 00:40
Hi NEC,

I have a FV15HP and there was a very soft "pop" during power on.

I have other bland sub that also have a "pop" during power on since day 1...
Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on April 27, 2014, 11:59
I place my F12 on a Subdude, now seems like called Ampdude

lately watch the FHD mkv Lone Survivor
into the 20th minutes when the 2 apache and 2 chinooks were flying to the destination, the chopper rotor sound was like causing the F12 to shake back and forth  :o
after playback the same scene a few times to see it moves, I thought I even hear metal knocking sound later for 5-10 secs  :o :o
I tried to check using other movies and music/songs to make sure the F12 is ok... well, apparently still intact

can F12 produce higher frequency like metal knocking sound?
any quick check to verify the sub is basically ok?

thanks
Title: Re: Official Rythmik Subwoofer Thread
Post by: synthesis on April 27, 2014, 14:51
If you drove the sub to the maximum cone displacement limit then yes you may hear clanking sound. 
Title: Re: Official Rythmik Subwoofer Thread
Post by: Yubaba on April 27, 2014, 15:32
Metal knocking is bottom up
Title: Re: Official Rythmik Subwoofer Thread
Post by: Mikeyz on April 27, 2014, 22:10
I place my F12 on a Subdude, now seems like called Ampdude

lately watch the FHD mkv Lone Survivor
into the 20th minutes when the 2 apache and 2 chinooks were flying to the destination, the chopper rotor sound was like causing the F12 to shake back and forth  :o
after playback the same scene a few times to see it moves, I thought I even hear metal knocking sound later for 5-10 secs  :o :o
I tried to check using other movies and music/songs to make sure the F12 is ok... well, apparently still intact

can F12 produce higher frequency like metal knocking sound?
any quick check to verify the sub is basically ok?

thanks

That is an issue called bottom up, is a weakness for all F12, I own dual F12 and all suffered same issue when the sub is trying to output to a low frequency bass, sad to say nothing much can be done about it unless you set the gain not over 11 o'clock and limiter ON,
Is best to be advice on this issue as this may damage the inner coils of the sub if frequently encountered . So please take note. jMHO.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Yubaba on April 27, 2014, 23:16
Your PB13U will not suffered from bottom up as it has a robust driver with high xmax
Title: Re: Official Rythmik Subwoofer Thread
Post by: palm101 on April 28, 2014, 12:27
Is the LV12S available in Singapore? It is the 240Volt version of the LV12R.
Title: Re: Official Rythmik Subwoofer Thread
Post by: audiovideo on April 28, 2014, 15:55
That is an issue called bottom up, is a weakness for all F12, I own dual F12 and all suffered same issue when the sub is trying to output to a low frequency bass, sad to say nothing much can be done about it unless you set the gain not over 11 o'clock and limiter ON,
Is best to be advice on this issue as this may damage the inner coils of the sub if frequently encountered . So please take note. jMHO.

is the F12 damage in anyway?
Volume on the sub is only half way mark and denon volume is 60+ to 70.
Will check the gain and on the limiter .....

Thanks all for your advises.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 28, 2014, 16:20
That is not a weakness , is just the max of a given sub can do and can be driven to .
let say you set all gain/vol on the sub to max , but you are just output a very low level your sub will not be over driven and will not so called bottom up and also need to take note the F12 is 370w only and it will not able to handle very loud output and also it a sealed design with servo for very fast recover and please be advise , is will be a good pratic to re-calibrate your sub if after a long usage and due to the run in process the sub respone to your room can also change. ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 28, 2014, 16:22
Is the LV12S available in Singapore? It is the 240Volt version of the LV12R.

We did not bring in this model .
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 28, 2014, 16:25
I place my F12 on a Subdude, now seems like called Ampdude
into the 20th minutes when the 2 apache and 2 chinooks were flying to the destination, the chopper rotor sound was like causing the F12 to shake back and forth  :o

Are you refer to the box moving ? or the driver ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: audiovideo on April 28, 2014, 16:31
Are you refer to the box moving ? or the driver ?

the box
may have to try putting the sub on the floor ... maybe subdude a bit too "just nice"
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 28, 2014, 16:45
the box
may have to try putting the sub on the floor ... maybe subdude a bit too "just nice"
Is the mass vs the vol output , possible to adds weight on top the sub ? something around 20kg , you may even discover that can improve the mid bass also ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: audiovideo on April 28, 2014, 17:48
Is the mass vs the vol output , possible to adds weight on top the sub ? something around 20kg , you may even discover that can improve the mid bass also ;D

 :o
ok, will try that  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: francis wu on April 28, 2014, 18:01
Try sitting on it when the bass scenes come up! :-)

Sent from my vivo Xplay3S using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: Mikeyz on April 28, 2014, 23:27
the box
may have to try putting the sub on the floor ... maybe subdude a bit too "just nice"
This is what I had experienced, if the ground surface is not carpet it may move with the spikes on but with a subdude, it can encounter such issue. Bass is better too with the subdude on.
If your floor is carpet, F12 with spikes will not move. Just to share
Title: Re: Official Rythmik Subwoofer Thread
Post by: audiovideo on April 30, 2014, 14:28
This is what I had experienced, if the ground surface is not carpet it may move with the spikes on but with a subdude, it can encounter such issue. Bass is better too with the subdude on.
If your floor is carpet, F12 with spikes will not move. Just to share
Title: Re: Official Rythmik Subwoofer Thread
Post by: Mikeyz on April 30, 2014, 21:59
mine is with the leg on ;D, not spike
They do provide spikes that comes with the F12, very solid feel
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 12, 2014, 12:51
Just a interest check first , anyone keen on the F12 black Oak as we are ordering stock so you may tagalong and save some on the shipping ? if so please pm only and don't post or reply here , as this not a sales thread.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Infestedfred on June 12, 2015, 13:53
Bros, need your advice here.
Currently I'm using F15, connect through LFE in to my Onkyo AVR 929.
Have been using Audyssey XT32 for room correction.
Recently, just got myself a Naim Nait XS integrated amp, and would like to connect my F15 to the Naim sub out for 2.1 music listening.
What's the best way to connect the F15 to my Naim, without changing the sub volume as it has been proper calibrated for HT use.
Shall I use 2 RCA connect to Line in of F15 to Naim sub out?
Or connect the speaker cable, from F/L speaker to F15 speaker high level in?
Hope can get advice from all the bros here.
Thanks.
Title: Re: Official Rythmik Subwoofer Thread
Post by: audiovideo on July 02, 2015, 08:41
Thought of upgrading the sub without breaking the piggy bank. Any recommendation for sub in the market with slightly better performance than F12 at similar or slightly higher price range but without the "bottom up" issue.  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on July 02, 2015, 12:02
F15.

By the way, what is lacking in your current sub that you want to upgrade?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on July 03, 2015, 15:34
Bros, need your advice here.
Currently I'm using F15, connect through LFE in to my Onkyo AVR 929.
Have been using Audyssey XT32 for room correction.
Recently, just got myself a Naim Nait XS integrated amp, and would like to connect my F15 to the Naim sub out for 2.1 music listening.
What's the best way to connect the F15 to my Naim, without changing the sub volume as it has been proper calibrated for HT use.
Shall I use 2 RCA connect to Line in of F15 to Naim sub out?
Or connect the speaker cable, from F/L speaker to F15 speaker high level in?
Hope can get advice from all the bros here.
Thanks.

Depend on your version of F15 , as some come with line in and LFE in.
if your version is the abv , then connect LFE to the AVR and let Audy to the EQ.
and connect niam pre out both L+R to the line in .
if the sub already calibrated ,then you should adj the gain to match the naim pre first , there after and if needed go to the AVR setup and increase or reduce the level to match back the needed level for Ht.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on July 03, 2015, 16:52
Thought of upgrading the sub without breaking the piggy bank. Any recommendation for sub in the market with slightly better performance than F12 at similar or slightly higher price range but without the "bottom up" issue.  ;D

We will have the E15HP version in by end july / early Aug and is just 1" bigger then your F12 .
We will have a trade-in programme one we confirm the shipment date.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Infestedfred on August 03, 2015, 01:52
Depend on your version of F15 , as some come with line in and LFE in.
if your version is the abv , then connect LFE to the AVR and let Audy to the EQ.
and connect niam pre out both L+R to the line in .
if the sub already calibrated ,then you should adj the gain to match the naim pre first , there after and if needed go to the AVR setup and increase or reduce the level to match back the needed level for Ht.
Thanks for your advice, bro Peng.
Yes, my F15 version comes with the LFE IN & Line IN, and I followed your instruction above to connect the F15 Line IN to my Naim Sub Out, LFE IN to Onkyo AVR.

There are some sub settings that I need to verify with you, bro Peng.

My current F15 Sub setting is as below:
Line IN Delay/Phase: 0
Crossover: 120Hz

Line In Low Pass: 80Hz/24
Rumble Filter: ON
Extension Filter FREQ: 14
Extension Filter Damping: LOW

Is there a need to change my above setting if I use the sub to integrate to my Naim for music listening?

Besides that, would like to verify with you that my sub has been calibrated through Audy XT32 (set the sub gain to match 75Hz Audy requirement). After Audy calibration, you mean I still can change the sub gain to match my Naim for music listening? It won't affect the Audy EQ on the sub?

Sorry for the long questions and appreciate to get the reply from you, bro Peng.

Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 03, 2015, 20:53
We will have the E15HP version in by end july / early Aug and is just 1" bigger then your F12 .
We will have a trade-in programme one we confirm the shipment date.

Just a fast update , as not to keep all pre-order in the dark.
We will have the E15HP , in black Oak and also glossy black ( SE) for this production and we have also the FV15HP in black Oak , all should be ready after NDP , as we are very tight up now.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 03, 2015, 20:54
Thanks for your advice, bro Peng.
Yes, my F15 version comes with the LFE IN & Line IN, and I followed your instruction above to connect the F15 Line IN to my Naim Sub Out, LFE IN to Onkyo AVR.

There are some sub settings that I need to verify with you, bro Peng.

My current F15 Sub setting is as below:
Line IN Delay/Phase: 0
Crossover: 120Hz

Line In Low Pass: 80Hz/24
Rumble Filter: ON
Extension Filter FREQ: 14
Extension Filter Damping: LOW

Is there a need to change my above setting if I use the sub to integrate to my Naim for music listening?

Besides that, would like to verify with you that my sub has been calibrated through Audy XT32 (set the sub gain to match 75Hz Audy requirement). After Audy calibration, you mean I still can change the sub gain to match my Naim for music listening? It won't affect the Audy EQ on the sub?

Sorry for the long questions and appreciate to get the reply from you, bro Peng.

will try reply in detail , if I find time as too tight up and too much to think.

As the Niam pre out don't have any control for the bass needed to match for your 2 ch set ,so is good you adj the gain manually to match and there after if needed go into the AVr to increase or reduce the Bass level/gain only to match black the needed bass output for Ht and this will not affect the EQ at all.
If you need both to be properly calibrated you may add a antimode between the niam output and the line input and use the LFE input for Ht.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 05, 2015, 01:17
Just a fast update , as not to keep all pre-order in the dark.
We will have the E15HP , in black Oak and also glossy black ( SE) for this production and we have also the FV15HP in black Oak , all should be ready after NDP , as we are very tight up now.
http://www.xtremeplace.com/yabbse/index.php?topic=209199.0
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 21, 2015, 15:44
Time for collection for the pre-order.
(http://i308.photobucket.com/albums/kk329/ckpeng/IMG_7397_zps4pa1bmjb.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: chamay on August 22, 2015, 16:48
Bought my E15 from peng in year 2012.
Any differences between rythmik e15 and e15hp?
Title: Re: Official Rythmik Subwoofer Thread
Post by: whyeme on August 22, 2015, 17:54
I believe e15hp has more power than e15.
Title: Re: Official Rythmik Subwoofer Thread
Post by: francishuang on August 23, 2015, 01:29
350w to 600w?
Cant remb exactly
Title: Re: Official Rythmik Subwoofer Thread
Post by: flowerpot99 on August 26, 2015, 00:20
Bought my E15 from peng in year 2012.
Any differences between rythmik e15 and e15hp?

The driver and power is different. The HP driver used a bigger Motor and voice coil, has more power (370w vs 600w) and higher extrusion. They seems to sound the same since the freq is still very linear but the main diff is the amount of output.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 27, 2015, 02:45
Thanks for all your support , as of today all have collected their E15HP BO/SE and FV15HP ,few member here have 4 in their setup .
Anyone keen to have a shoot out for Multi sub tunning ? if there is enough interest we can hold another session or open house :P
Title: Re: Official Rythmik Subwoofer Thread
Post by: CASH on September 27, 2015, 08:17
I would love to offer my place for another open house session..
But my downstairs neighbour has oredi come up to my place the last time we held it..
They were not to pleased that the whole building structure was shaking!!
That was their exact words...
 :'(
Title: Re: Official Rythmik Subwoofer Thread
Post by: desray on September 27, 2015, 09:50
I would love to offer my place for another open house session..
But my downstairs neighbour has oredi come up to my place the last time we held it..
They were not to pleased that the whole building structure was shaking!!
That was their exact words...
 :'(

My advice bro, unless you plan to move house soon...its unwise to antagonize the neighbors imo.
Title: Re: Official Rythmik Subwoofer Thread
Post by: CASH on September 27, 2015, 09:53
Yup.... its sad that had to happen...
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 03, 2015, 18:58
Another 4x Rythmik setup, is not abv loud/SPL but defination , detail ,layer, even thru out all seating and the most mis-understand issue > You need not to play Loud to get all this.....
(http://i308.photobucket.com/albums/kk329/ckpeng/IMG_7762_zpsczpsgxsz.jpg)(http://i308.photobucket.com/albums/kk329/ckpeng/IMG_7763_zpslfm6v8yu.jpg)(http://i308.photobucket.com/albums/kk329/ckpeng/IMG_7764_zpsrmsqxph8.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 11, 2015, 21:44
came across these informative reads on AVS on Rythmik subs. Tot it will be useful to share here too. Very articulate and he tried to put in a layman way.

Quote from: Rythmik;38808377
Sound quality is the largest difference between our subs vs SVS or other nonservo subs. One of our customer compared our F25 with SVS PB2000. I know these two are different type of subwoofers, but he pointed out one thing. The SVS is very "chatty" even in music and F25 is very quiet and only show its presence when the special effects call for it. For me, that speaks for the highest level of integration. Some customers like their subs constantly remind them of their presence. That is not what our subs are designed for. Our subs are designed to fully integrated into the system so that customers hear the sound as if it is from a full range speaker system. We should only feel the presence of subwoofer when the walls start shaking.

Next is the SPL and frequency response. Designing a ported sub is more difficult than designing a sealed sub. All of today's ported subs need built-in EQ to extend flat to low frequency point. It is a struggle with driver parameters and enclosure design, and once those are set, the engineers need to work with the so-called "native" frequency response and start doing EQ. It is a complicated. Sometimes the native EQ has Q value as high as 1.1. There is no simple EQ that can correct this type of problem in production because drivers exhibit unit-to-unit variation. An EQ that is valid for driver batch A is not valid for batch B. A lot of time, it end up with roll-off that is just too early (or high in frequency) or frequency response with a bump at the lower end, which translates to ringing at time domain and boominess in sound quality. Servo feedback has a way to changing the driver parameters without physically changing them. This gives us a distinct advantage that we don't need built-in EQ to get to low extension. It just naturally achieves that goal. As a result, customers can be assured that they get the maximum extension out of that enclosure box.  Hope this gives you a better overall picture.


Quote from: Rythmik;38810321
Delay time is not just to adjust the distance difference, it is also used to account for the phase difference at the crossover point between HPF and LPF. For instance, your usage model is different from a bookshelf sealed model which starts to roll-off at say 70hz. So even though the same 12db/oct filter is used on front speaker, your Acoustat is only 12db/oct roll-off, and a sealed model will have 24db/oct and yet a ported front speakers will have 36db/oct. This is because yours is flat down to 30hz. A bookshelf sealed and ported front speaker have 12db/oct and 24db/oct roll-off already without any additional HPF. With different type of front speakers, we already have different phase difference at the crossover point.

I recommend place sub close the panels to get more continous imaging result.

Quote from: Rythmik;38646945
Yes. That is the trade-off between high damping and low damping. The frequency response you have for high damping is correct. You notice there is a more gradual roll-off below 35hz. But that is what happen with high damping. If we do a second "derivative" (from calculus, first derivative is the slope of FR, the second derivative is the change rate of slope), the second derivative of high damping is noticably lower than that of a low damping. The perception of high damping sound is that it is smoother just because of this reason. If you feel the bass is not as potent, then you can bump up the gain of sub by another 1db or 2db more than the setting you have with low damping. This will bring up the bass output and at the same time increase the midbass output, which you may not object.

In FV15HP, there is a separate extension frequency control. But setting high damping with lowest extension can occassionally lead to over-excursion. I consider that as power-user feature for customers understand the trade-off of high damping. For LV12R, the objective is diffferent.



Quote from: Rythmik;38030905
The idea is same for LV12R and FV15HP. Damping affects ringing. But in the end,
it depends on the type of sound you'd like. If you want articulate sound with less ringing, you want to use higher damping sound. The low damping setting not only increases ringing, it also makes the deep extension sound delayed. The upside of low damping is it sounds "full-body" (or boomy to others).

But everything is relative. Databass site shows the "spectrogram" plot. It uses color code to display where the energy is concentrated at each frequency when the sub responds to an impulse. Ideally, the red band should be straight and horizontal only. But several other subs have the lower end band tilting up quite significantly, meaning the bottom end indeed in lagging in terms of timing. Even our FV15HP 2port mode in low damping setting shows a bit of the trend. However, it is much improved in 1port mode.

Lastly, group delay, spectrogram, waterfall, and high pass filter Q value are all related. And yet it is difficult to visually guess the correlation between FR and spectrogram in general. Some of the easy established correlation is that if the FR has a hump around the corner frequency, that is a result of low damping (high Q) high pass characteristic and it will correlate to a slow decayed ridge around the corner frequency in the waterfall plot.

Quote from: Rythmik;37029650
The max output is determined by the power amplifier output (say 300WRMS) driving the driver. Think of the amplifier in LV12R as a pre-processor plus a power amp. When you have a pre-pro driving a power amp, does the pre-pro setting affect the max SPL output of the system? Absolutely not. The SPL is determined by the power amp only. So is the max SPL output for front speakers driven by your receiver and etc. Does playing DTS or Dolby change the max SPL output?

The FR curve is the effect of the prepro EQ setting combined with the power amp. You may have thought FR of subwoofers are naturally flat. In fact, they can only extend down to 30hz to 40hz with the compact size that SVS, Hsu, or any other brands offer .

All vented subwoofers are decoupled from box spring force and therefore is prone to bottoming without rumble filter.

Quote from: Rythmik;37031706
First, if you haven't done simulation and only relied on the data-bass results, you may not have noticed some subtleties. In sealed mode of all those multi-tuned ported subs, the sealed mode output may have been limited by the driver excursion, if the driver have had a larger excursion limit, the output of sealed can be further increased. That is why we don't recommend sealed mode for any of our ported subs because it can lead to driver bottoming. Please do not confuse our recommendation with others. In the case of SVS, the stiff rubber surround does not help sealed mode output even though the driver has a pretty good. So its sealed mode output is further handicapped and show larger SPL difference. Don't extrapolate that to other data.

Another thing to understand is port diameter does not affect the output as much as it affects port noise. If one increases the port diameter by 2x, the port length needs to increase by 4x and the max output is same. If you just increase the port diameter without changing the port length, the port tuning frequency increases by a factor of 2x. We pick the port size of LV12R to achieve 20hz extension. If we have picked 4", we would have not been able to achieve that.

Quote from: Rythmik;36892290
Your logic is definitely correct. The db numbers we provide are reference numbers only.

But even CEA2010 has holes in the test procedure, it has no way of knowing the temperature of voice coil. We all know the voice coil temperature affects the max SPL output. So how much does tester know the voice coil is hot or cold? Nothing. But voice coil temperature determines the SPL output. For instance, at certain frequency range, the output difference is directly inversely proportional to voice coil temperature, a 150 Celsius rise reduces the output by 3db. This can be verified by the "power compression" curves which normally start to show 1db compression even at 105db-110db curves. Even if CES 2010 addresses the temperature uncertainty issue, there is no way that customers will get the same number in practical use. In the opening track, we can get the highest output because VC temperature is lowest. After intense special effect playing, the voice coil temperature rises and the max SPL decreases accordingly. Now if I want to "game" the CEA2010 test procedure, you know when I will arrange the most crucial max SPL numbers. But would that be fair to those who didn't test under exact the same condition? In short, CEA2010 is not as accurate as most think because of this temperature dependency. It is just as much of a guideline. Can we say to ourselves that let us wait till the voice coil temperature drops to room temperature before we start playing movies?




Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 11, 2015, 22:23
Quote from: Rythmik;36855122
JL is a company with very solid engineering. There are a lot of innovations (ie IP) on their drivers. But those are needed in order to be able to crank up high SPL in a SMALL enclosure using small diameter drivers with long excursion because thermal management (not to fry the driver), maintaining high BL value from a pretty big magnetic gap, and maintaining large excursion without the rubber surround becoming distorted are their top priority issues. So the key is SMALL enclosure, a desirable feature in car audio. If one does not need SMALL enclosures, those innovations may not be very valuable, a reason why we don’t them in our front speakers.

F15HP is designed with a different design philosophy. Our top priority is fast transient response(meaning low Q and high damping). To achieve that, we need to allow our subs to go down to 14hz with a separate rumble filter control. JL subs pretty much have that rumble filter engaged all the time. A rumble filter always adds ringing to the transient response.


Servo operation addresses another key problem in speakers (not just subwoofers)– memory effect. Memory effect can be explained as follows. If we have 4 notes A, B, C and D with different strength, the reproduced strength of each notes should not depends on the order they play. For instance, the note A strength should not be depend on if it plays as ABCD, DCBA, or DABC…etc. The ideal case that playback does not have memory effect is crucial to all audio gears. Its importance is even higher than distortion. For those who play pianos know not all of our 5 fingers have exactly same strength. A lot of piano practice is to add some compensation so that all 5 fingers appear to have same strength. Other instrument players face the same problem. We certainly don’t want audio gears to add their own memory effects. What are the factors giving arise to the memory effects in subwoofer? First one is the hysteresis of spider/surround of the drivers. Low compliance drivers (those with surround as hard as tires) just make the problem more serious because the spring force now mainly comes from surround/spider than the enclosure itself. The latter is much more linear with very low memory effect. We don’t see stiff surround drivers in our front speaker for a reason. It makes memory effect worse. The second is the voice coil temperature. Thermal behavior in drivers is very complicated. Each note of A, B, C, D leaves a different amount of thermal trace to the voice coil and whatever is played next depends on the history of previously played notes. That is a clear memory effect. There is a surge in high efficiency front speakers on this forum. One of the advantages they offer is they have lower thermal induced memory effect. Between these two sources of memory effect, servo operation reduces the first source by a factor of 3x(or 10db) and completely remove the thermal memory effect. Hope this offers a different perspective to your question.


PS. one may wonder why JL does not offer PR-based subs. Well in one of the CES several years ago, Earthquake wanted to demonstrate their PR-based subs can play 10hz. As soon as they did that, it was very apparent that sub was dancing on the floor and wanted to run away from the scene by itself at the same time. The company representative used his foot to pin that sub to the floor.



Quote from: Rythmik;36229906
I believe you have XS30 which has two 15" drivers. Output from L22 is similar to that F15HP/E15HP, the 15" high power model.

Regarding CEA numbers, I think the most important max output data is 20hz which is the number we provide as reference. This is because 20hz is the number in practice determines the max "volume" you can set on your AVR. Once the SPL at 20hz exceed the max output, the limiter is going to kick in and that bring downs the entire frequency band subwoofer plays. 20hz is not really audible. So it needs to a lot of signal strength and that combined. At the same time, subwoofer is normally least efficient at the bottom end of FR. These two factors make the 20hz output more important.

In terms of Data-bass subwoofer testing, we feel the limitation of the test method penalize the subs that extends low and that makes the measurement looks bad. For instance, if a sealed sub is down 10db at 20hz (vs another sealed sub down only 3db at 20hz), the former is going to have better distortion number at 20hz becasue it is down at least 7db more than the other model. That is why I keep joking the best bass is no bass even from measurement point of view. The same is true for impulse response and waterfall plot.

Quote from: Rythmik;36197346
The short answer is sealed sub will sound "leaner" compared to the "full-body" ported sub sound. But full-body can sometimes be interpreted as "boomy" for those favor sealed sub sound quality. The trade-off for ported sub is how to get the "full-body" sound without becoming "boomy". It is tricky, but we think that is the selling point of our subs.

BTW, this full body sound is sometimes is the reason we interpret the bass as slow or fast. If the sound projects an overly large object, we often associate that with slower movement. So our intuition is to call that kind of bass as slow bass. Now Dan Wiggins from Adire was the first person is use impulse response to demonstrate that the fastest bass is "tweeter". The reason is he was looking at the rising edge of the impulse response to compare if indeed the bass is faster from one sub vs another. It should have been the tail he needed to check. The rising edge of the impulse response is solely determined by the upper end extension. So he was looking at the wrong place. Second flaw of his test is that the impulse response distribute the energy same per Hz. What does that mean? The impulse signal is highly concentrated at high frequency. If we have a impulse response of a 20hz to 20khz signal, half of the energy is between 10khz and 20khz. The frequency band between 20hz to 100hz is only 80/20000 of the signal, or 0.4%. How do you get significance of your result with 0.4% content? The correct method should have been step response. Step response is the integral of impulse response. It makes the energy per octave more uniform. Unfortunately, his article sticks (cannot be retracted) and is mis-quoted over and over again.

Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on December 01, 2015, 00:17
Appreciate it if someone can jump in to help me on this? :) I can't fully recall what was the best extension filter settings before and after audyssey calibration. I remember i read this info somewhere but can't seem to find the exact post as the thread is too long. Currently I've dual subs in my setup - 1 F15HP and 1 E15HP placed in diagonal corners of the room. My AVR is the Denon 4520 (with Audyssey XT32). I'm using the LFE input on the sub, and the LINE IN input is not used.

Are the below settings correct?

Before audyssey calibration:
PEQ = Off
Damping = low (or should this be set as MID?)
Freq = 14Hz
Rumble filter = OFF
Line In / Low Pass = AVR12

After audyssey calibration:
PEQ = Off
Damping = high
Freq = 14Hz
Rumble filter = ON
Line In / Low Pass = AVR12

Also, for the PEQ settings, if my PEQ is set to OFF, does the 3 knobs of gain, bandwidth and freq need to be set to any specific level? Because i recall the user manual indicating to set it to the below settings, but shouldnt these 3 knobs functions be disabled when PEQ is set to OFF?  ???
Gain = 0db
Bandwidth = middle position
Frequency = middle position (40 Hz)

Thanks in advance.  ;)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on December 05, 2015, 17:36
Just to also share here (found my answer) the recommended calibration settings by Rythmik:
http://www.avsforum.com/forum/113-subwoofers-bass-transducers/1214550-official-rythmik-audio-subwoofer-thread-156.html#post21960893

Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 29, 2016, 13:44
Anyone, who want to have a feel of stack DXD 808 with Rythmik E15Hp ( to cover the very deep low ) or just E15HP ? you can have a feel of it from now till next Friday ,thereafter we will shut down for CNY and relocate to Level 4 and can only demo it when the New showroom ready by end of Feb.

Text me @ 96387418 to arrange
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 05, 2016, 20:09
Thanks for all the support, the F12 pre-order will be close by 2359 hrs.
http://www.xtremeplace.com/yabbse/index.php?topic=225589.0
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on April 02, 2016, 13:51
Heads up. Rythmik coming out with new subs ;) Looks promising.
http://www.avsforum.com/forum/113-subwoofers-bass-transducers/1214550-official-rythmik-audio-subwoofer-thread-776.html

@ Peng - u bringing in the new toys?  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on April 02, 2016, 23:47
Must..... resist.......
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on April 03, 2016, 11:02
Must..... resist.......

haha, u sure dont want more flappin feel...?  ;D ;D

Quoting Enrico:
The FV18 will have more output below 20Hz, around 3dB - 4dB more than FV15HP @ 12Hz. Above 20Hz it will be very similar to FV15HP. However, if somebody is looking for massive output at 12Hz I would save more money and hold on to the FV25HP. The FV25HP would have around +9dB more than FV15HP @ 12Hz, so we are talking 108dB @ 12Hz. Kinda Danley DTS-10 output numbers. :o :o

The FV25HP will use a mod DS1510 driver (2ohms) so it can handle more power. The amp on the FV25HP is the HX2000XLR3 with two (02) 900 watts Hypex modules.  :o :o

 ;D ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 04, 2016, 15:48
Thanks for all the support, the F12 pre-order will be close by 2359 hrs.
http://www.xtremeplace.com/yabbse/index.php?topic=225589.0

Collection started today till 730pm.
(http://i308.photobucket.com/albums/kk329/ckpeng/IMG_1587_zpsubqeclqw.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 05, 2016, 20:32
Here you go , the New ported 12" LVX 12.

(http://i308.photobucket.com/albums/kk329/ckpeng/IMG_1594_zpswqouxpfx.jpg)   (http://i308.photobucket.com/albums/kk329/ckpeng/IMG_1596_zps9ytd9sx4.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on April 05, 2016, 21:30
Here you go , the New ported 12" LVX 12.

(http://i308.photobucket.com/albums/kk329/ckpeng/IMG_1594_zpswqouxpfx.jpg)   (http://i308.photobucket.com/albums/kk329/ckpeng/IMG_1596_zps9ytd9sx4.jpg)

awesome peng, can post here the selling price? :) Thanks for offering us more choices on good subs. This sub has lots of good reviews in US.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ALTK on April 05, 2016, 22:18
Here you go , the New ported 12" LVX 12.

(http://i308.photobucket.com/albums/kk329/ckpeng/IMG_1594_zpswqouxpfx.jpg)   (http://i308.photobucket.com/albums/kk329/ckpeng/IMG_1596_zps9ytd9sx4.jpg)

The LV sub is finally here Liao!  :D
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on April 05, 2016, 22:26
The LV sub is finally here Liao!  :D
Did you ordered one as well?
Title: Re: Official Rythmik Subwoofer Thread
Post by: sdds on April 05, 2016, 22:31
Just heard at Peng shop for a short while , sound quite good . Do consider if u short listing for a 12 inch sub .
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on April 05, 2016, 22:34
Just heard at Peng shop for a short while , sound quite good . Do consider if u short listing for a 12 inch sub .
Any impression how it sound vs FV15HP?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ALTK on April 05, 2016, 22:47
Did you ordered one as well?

Boh la...haven't even audition wor  ;D. But I was told that can go as low as a 15" sub.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on April 05, 2016, 22:53
Boh la...haven't even audition wor  ;D
Haha I try my luck on Friday
Title: Re: Official Rythmik Subwoofer Thread
Post by: ALTK on April 05, 2016, 22:56
Haha I try my luck on Friday

I dun think u need this to go with ur 12012 la. Haha..
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 06, 2016, 10:21
awesome peng, can post here the selling price? :) Thanks for offering us more choices on good subs. This sub has lots of good reviews in US.

Retaill $1600 + 7% = $1712 , inclusive of delivery and can pay by cards .
will be coming up a pre-order soon......

Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on April 06, 2016, 10:29
Retaill $1600 + 7% = $1712 , inclusive of delivery and can pay by cards .
will be coming up a pre-order soon......

cool, thanks for this sub. I'm sure many will be happy with this ported sub at this price point.

Any plans to bring in the upcoming new monsters as well - FV18 & FV25  ;D ;D
Title: Official Rythmik Subwoofer Thread
Post by: Tiktokape on April 06, 2016, 10:32
I dun think u need this to go with ur 12012 la. Haha..
Stack 12012 right?

Any plans to bring in the upcoming new monsters as well - FV18 & FV25  ;D ;D
They are huge!
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 06, 2016, 11:09
cool, thanks for this sub. I'm sure many will be happy with this ported sub at this price point.

Any plans to bring in the upcoming new monsters as well - FV18 & FV25  ;D ;D

I have the old version of FV25 with me for 4yrs, Anything larger then standard 15" sub are base on inden.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 16, 2016, 14:02
Thanks for the recent MO of sub from China's look alike,

I have received many pm and text from XP member for the E15HP design /driver and the servo .
Please take a closer look of the driver and compare the size of both VC and look out for the servo coil connection.
On the plate amp , Rythmik's PCB have it own servo control pcb and the connection cable to the servo coil.
Rythmik provide 5 yrs for driver and 2 yr for amp/electronic and on top of this we provide 2 yr local warranty service.

As many asked me for a MO and my answer is No, sorry, as we are the local dealer and carry stock, but what we can help and do is follow our shipment to save cost ,when our stock run out and we order new stock .

So , here you go as we just finish our stock for E15HP and I have asked factory for E15HP se with XLR2 for this round and target around $2100 inclusive of GST.

Anyone , who is keen can pm me or indicate over here and if that nos is good to go I will come out a pre-order.
Just for record , a E15HP PEQ3 in black is selling at $2499.

Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on May 12, 2016, 23:39
FV18HP prototype. Looks bad ass. Another quality sub from Rythmik.

Peng - u bringing in or need special order?  :)

(courtesy from Rythmik Audio and AVS forums)
http://www.avsforum.com/forum/113-subwoofers-bass-transducers/1214550-official-rythmik-audio-subwoofer-thread-787.html
(http://www.rythmikaudio.com/avsforum/FV18_proto.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: SiaOLiaO on May 15, 2016, 02:16
Thanks bro Peng for his help to deliver my sub and the collect the trade in sub As I just had surgery on my leg. Now I truly experience the bass that I have been missing all along. The LVX12 is a worthy replacement for my PB10! Now I'm thinking if I should got dual! Thanks again Peng!


(http://i900.photobucket.com/albums/ac206/SiaOLiaO/Mobile%20Uploads/image.jpeg) (http://s900.photobucket.com/user/SiaOLiaO/media/Mobile%20Uploads/image.jpeg.html)

Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on May 15, 2016, 10:40
Thanks bro Peng for his help to deliver my sub and the collect the trade in sub As I just had surgery on my leg. Now I truly experience the bass that I have been missing all along. The LVX12 is a worthy replacement for my PB10! Now I'm thinking if I should got dual! Thanks again Peng!


(http://i900.photobucket.com/albums/ac206/SiaOLiaO/Mobile%20Uploads/image.jpeg) (http://s900.photobucket.com/user/SiaOLiaO/media/Mobile%20Uploads/image.jpeg.html)

Nice. If u go dual,  ur bass experience will be brought to a different level  ;) if space and budget allows, go for it.

Glad that u liked the lvx12! Rythmik produces very good subs
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on May 15, 2016, 10:55
Thanks bro Peng for his help to deliver my sub and the collect the trade in sub As I just had surgery on my leg. Now I truly experience the bass that I have been missing all along. The LVX12 is a worthy replacement for my PB10! Now I'm thinking if I should got dual! Thanks again Peng!


(http://i900.photobucket.com/albums/ac206/SiaOLiaO/Mobile%20Uploads/image.jpeg) (http://s900.photobucket.com/user/SiaOLiaO/media/Mobile%20Uploads/image.jpeg.html)


Nice setup, another sub on the right will good. Nice front 3 MA PL100 & 150 you had.
Title: Re: Official Rythmik Subwoofer Thread
Post by: SiaOLiaO on May 15, 2016, 20:30
Thanks Bros sevenz and tiktotape~ yeah probably when i have grown used to the sound now~

Yeah, I got these PL cos I couldn't get my hands on the GX! Oh well~ still a few more upgrades to go before my setup is there.. $$$$$$
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on May 26, 2016, 11:27
Had a listen on LV12 yesterday evening. A smaller bro of FV15HP and more friendly for one dealing with space constraint in home placement. LV12 provides the air movement one lacks in a self containment room. I can feel more AIR presence with both unsealed ports opposed to one sealed port. It illustrates a dense and uneasiness kinda atmosphere for those into HORROR  ;D like me. It does not push fast nor providing more mid bass vs E15HP, but it is capable to go low in rumbling situations, good for me who don't listen to high SPL, I'm usually at max 65, norm at 55.

Since I'm using 1 unit of KK12012 so I tried the KK12012 and LV12 combo. They provides a evenly well-balanced bass coverage, KK thumping the hard and fast mid bass in a layered manner and let LV12 to shake the lows.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ALTK on May 26, 2016, 16:21
Had a listen on LV12 yesterday evening. A smaller bro of FV15HP and more friendly for one dealing with space constraint in home placement. LV12 provides the air movement one lacks in a self containment room. I can feel more AIR presence with both unsealed ports opposed to one sealed port. It illustrates a dense and uneasiness kinda atmosphere for those into HORROR  ;D like me. It does not push fast nor providing more mid bass vs E15HP, but it is capable to go low in rumbling situations, good for me who don't listen to high SPL, I'm usually at max 65, norm at 55.

Since I'm using 1 unit of KK12012 so I tried the KK12012 and LV12 combo. They provides a evenly well-balanced bass coverage, KK thumping the hard and fast mid bass in a layered manner and let LV12 to shake the lows.

U brought one home? ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on May 26, 2016, 16:28
U brought one home? ;D
I measure here, measure there yesterday night, kena cold stare throughout. Need to debate for justification agreement.

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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on May 26, 2016, 20:16
Nice. Congrats on the purchase bro hehe :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ALTK on May 26, 2016, 20:40
Nice. Congrats on the purchase bro hehe :)

Ya, congrats in advance. Lol..
Title: Re: Official Rythmik Subwoofer Thread
Post by: skong121176 on May 26, 2016, 20:48
Congrats too in advance must invite listen oh


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Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on May 26, 2016, 20:49
Haven buy la! I need to dig some of bass clips for audition.


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Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on May 26, 2016, 20:59
Nice addition. How will you integrate them together?
Title: Official Rythmik Subwoofer Thread
Post by: Tiktokape on May 26, 2016, 21:01
Nice addition. How will you integrate them together?
I'm looking at MiniDSP 2x4 for integration, from my reading, it seems that I can add a house curve using REW.

Another two DSP devices are Antimode & Xilica XP-4080.


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Title: Re: Official Rythmik Subwoofer Thread
Post by: mutant on May 26, 2016, 21:48
Wow... invite me oso ar, interested to hear both blend together in action.. *slurps*..

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Title: Re: Official Rythmik Subwoofer Thread
Post by: Yubaba on May 26, 2016, 22:00
It should be Antimode Dual Core not Antimode
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on May 26, 2016, 22:02
It should be Antimode Dual Core not Antimode
Ya, I'm referring to dual core 2.0 DSP


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Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on May 26, 2016, 22:20
I could never figure out which minidsp plugin is the right one for subwoofer use.

The price is cheap on the minidsp, but the learning curve is slightly steep.
Antimode DC 2 is expensive, but very easy to use.


I've not touched Xilica before, so I can't comment much on it.

Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on May 26, 2016, 22:28
We can discuss more over here: http://www.xtremeplace.com/yabbse/index.php?topic=191026.0

I have pasted some information over there for one who is keen. I'm still digesting it... :-X

I have seen Xilica in action, my friend is using it, staying pretty near to us  ;D using KK DXD-808 for mid bass and Rythmik E15HP for low. I can arrange for you to take a look if you cares  :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on May 26, 2016, 22:39
I measure here, measure there yesterday night, kena cold stare throughout. Need to debate for justification agreement.

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From past experiences, usually when you start measuring here n there, the decision is already set in mind.

Congrats in advance too :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on May 26, 2016, 22:41
From past experiences, usually when you start measuring here n there, the decision is already set in mind.

Congrats in advance too :)
Actually I measured a total of three times, twice were meant for KK12012 to stack and another for E15HP. Lol
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on May 26, 2016, 22:56
What's your measurement setup like?
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on May 26, 2016, 22:57
What's your measurement setup like?
I meant measurement on subwoofer dimensions in my place to house another subwoofer. I'm not referring to REW. My bad  :-[
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on May 27, 2016, 23:18
Haven buy la! I need to dig some of bass clips for audition.

for home audition - the sub is 90% considered yours liao. ;D ;D muahaha...

so which sub r u auditioning and comparing now? is it both the E15HP and LVX12 or only LVX12? :)
Title: Official Rythmik Subwoofer Thread
Post by: Tiktokape on May 27, 2016, 23:37
I didn't compare any. Just listen to LVX12 on standalone basis. E15HP excels against LXV12 in mid bass and speed since it is a sealed subwoofer.

Like I mentioned earlier, I'm using KK 12012 so I tried out KK 12012 and LVX12 as a combo. The intention is to use LVX12 as 30hz and below movement subwoofer.


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Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on May 27, 2016, 23:40
Tikto

You need to consider the fv15hp. Go the biggest once you get approval. Don't go halfway. Make full use of the opportunity.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on May 28, 2016, 00:11
Tikto

You need to consider the fv15hp. Go the biggest once you get approval. Don't go halfway. Make full use of the opportunity.
Haha I knew you will type that! In such intent, FV15HP has to take over KK12012 position as front deployment and allowing KK12012 as rear subwoofer beside my sofa. I'm not sure how such combo will work though.

Or duck KK12012 and go FV15HP(front) and LVX12(rear).

Or back to original plan, just take LVX12 as rear subwoofer


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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on May 28, 2016, 00:41
I didn't compare any. Just listen to LVX12 on standalone basis. E15HP excels against LXV12 in mid bass and speed since it is a sealed subwoofer.

Like I mentioned earlier, I'm using KK 12012 so I tried out KK 12012 and LVX12 as a combo. The intention is to use LVX12 as 30hz and below movement subwoofer.

ha oic... smell like more poison  ;D ;D If u need a sub for 30Hz and below, take jag advice & kidnap the FV15HP home bro.  ;D The low rumble is REALLY AWESOME haha...

If u really decide to hv 2 different subs, the difficulty is really in integrating them.... Need to invest in a DSP. If not, u will likely face potential cancellations and overlapping frequencies that will smear the coherence of the bass notes between the subs. (i was using 1kk as midbass and 1 F15HP for lowbass, it brought me smiles but wait till u read next para)  ;D

And, alternatively, since u are going dual, if u would take my humble suggestion, try out dual identical subs. When i tried that (compared to having 1 sub for mid and 1 sub for lows), it brought my HT/bass experience to a WHOLE NEW LEVEL. there was no turning back ever since. I wished i did that earlier keke...  ;)

Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on May 28, 2016, 01:00
I have played with FV15HP for a period of time at another location so I know how it performs on low rumble however I'm seeking a pressure intensity kinda of felt movement.

I'm aware of the 'may need to' deployment of an external DSP for two different brand subwoofers. Using MiniDSP as consideration, low end of 2x4 to DDRC-88A w/Live Dirac. As said, easier with two identical subwoofers.

So what are using at the moment of identical subwoofer.


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Title: Re: Official Rythmik Subwoofer Thread
Post by: francishuang on May 28, 2016, 07:11
I have played with FV15HP for a period of time at another location so I know how it performs on low rumble however I'm seeking a pressure intensity kinda of felt movement.



Intensity....
Maybe u wana stack up the kk12012 n add a fv15hp
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on May 28, 2016, 18:42
I have played with FV15HP for a period of time at another location so I know how it performs on low rumble however I'm seeking a pressure intensity kinda of felt movement.

So what are using at the moment of identical subwoofer.

can articulate a bit more of the 'pressure intensity kinda of felt movement'? keke :)

Ur last sentence got typo?
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on May 28, 2016, 19:02
Pressure intensity? Turn up the volume louder. That will give you the intensity thats will really hit the chest hard. But then neighbors might want to hit back hard too..... :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on July 06, 2016, 02:36
Follow my shipment , ready for collection.
http://www.xtremeplace.com/yabbse/index.php?topic=233953.msg1155142#msg1155142
Title: Re: Official Rythmik Subwoofer Thread
Post by: facembanijung on July 06, 2016, 02:54
You need to consider the fv15hp ..
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 26, 2016, 14:55
Collection time,
(http://i308.photobucket.com/albums/kk329/ckpeng/26AUGcollection-2_zpswqbph8eo.jpg)
http://www.xtremeplace.com/yabbse/index.php?topic=235613.msg1160299#msg1160299
after that will have 20sets of used sub up for sales.
Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on October 08, 2016, 21:01
Currently using F12 bought almost 4 yrs ago
thought of trying out dual sub  ;D
so my best bet is to get an identical F12? XLR2?
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 08, 2016, 23:22
Currently using F12 bought almost 4 yrs ago
thought of trying out dual sub  ;D
so my best bet is to get an identical F12? XLR2?

Bro, how big is your room and what are your listening preferences?
Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on October 09, 2016, 16:47
Bro, how big is your room and what are your listening preferences?

5rm living room... 6x5m
but tv to sofa area 3.5x4m
50-50 for HT and music (chinese pop  ;D)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 09, 2016, 18:42
5rm living room... 6x5m
but tv to sofa area 3.5x4m
50-50 for HT and music (chinese pop  ;D)

any openings to other rooms that cannot be closed?
Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on October 11, 2016, 18:48
any openings to other rooms that cannot be closed?

something like that
TV and HT along the living room/study wall. F12 at the windows side (bottom of pic / pillar)
all openings have doors, can close.
Second F12 should be the other end of the living/study wall.

(https://sg1-cdn.pgimgs.com/listing/19275532/UPHO.56752618.V800/486B-Tampines-Avenue-9-Pasir-Ris-Tampines-Singapore.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on October 11, 2016, 19:01
Good to have 2 subs.

But keep several sub positions open. Preferable, 3-4 potential locations.

Its Murphy's Law that the positions that looks good almost always sounds bad.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 11, 2016, 20:23
something like that
TV and HT along the living room/study wall. F12 at the windows side (bottom of pic / pillar)
all openings have doors, can close.
Second F12 should be the other end of the living/study wall.

(https://sg1-cdn.pgimgs.com/listing/19275532/UPHO.56752618.V800/486B-Tampines-Avenue-9-Pasir-Ris-Tampines-Singapore.jpg)

Kitchen got door? :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 12, 2016, 02:36
Currently using F12 bought almost 4 yrs ago
thought of trying out dual sub  ;D
so my best bet is to get an identical F12? XLR2?
First thing first , do we buy our shoe in pair ?
Yes , we need not buy in pair for a subwoofer. But one used for 4 yrs and then add another brand new, even they are 100% same driver and same electronic , will they perform the same ? your best bet look for a set at least used for 2yrs to match your current set, if you intend to keep your current set ;)

XLR2 or XLR3 is the input board connector PCB .the dif is on the PEQ and the current version is PEQ3 will not be the same as your model, think 4 yrs ago , your's may not have the auto standby feature ?

Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on October 12, 2016, 19:56
Kitchen got door? :)

sliding fibre glass door .. but usually left open
Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on October 12, 2016, 19:58
XLR2 or XLR3 is the input board connector PCB .the dif is on the PEQ and the current version is PEQ3 will not be the same as your model, think 4 yrs ago , your's may not have the auto standby feature ?

it says A370PEQ3.
Ok... be prepare to buy a new pair if really going for dual
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 12, 2016, 22:01
sliding fibre glass door .. but usually left open

Would recommend dual subs for the bass to be able to fill your room size. Go dual 12" ported (maybe the lvx12?) or dual 15" (e/f15hp)

Peng has an rythmik MO now, can quickly tag onto his MO. Very good price.
Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on October 18, 2016, 21:46
Would recommend dual subs for the bass to be able to fill your room size. Go dual 12" ported (maybe the lvx12?) or dual 15" (e/f15hp)

Peng has an rythmik MO now, can quickly tag onto his MO. Very good price.

Thank you bro  ;D
many options to consider  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 19, 2016, 17:18
will be having another smaller version of a servo base 12" ported 300w sub call LV12S for our market here with a target price of $1000. MO may start soon.....
Title: Re: Official Rythmik Subwoofer Thread
Post by: mutant on October 25, 2016, 23:52
Seems interesting..  :D
will be having another smaller version of a servo base 12" ported 300w sub call LV12S for our market here with a target price of $1000. MO may start soon.....
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 26, 2016, 00:25
Seems interesting..  :D

should be ready for audition by this Saturday....
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 26, 2016, 19:25
will be having another smaller version of a servo base 12" ported 300w sub call LV12S for our market here with a target price of $1000. MO may start soon.....

Wow... just for SG? Thanks for this Peng

Would u be able to share what is the key difference between this and the lv12r?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 28, 2016, 15:12
Wow... just for SG? Thanks for this Peng
Would u be able to share what is the key difference between this and the lv12r?
Lv12R is a rear sigle ported , our version is double front ported it function almost the same as the LVX12 and just smaller with a 300w amp , it target for new user enter into HT setup with very limited space to house a decent sub , yet wanted something more then just boom and it also capable of good music reproduction as it also come with servo drive.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 28, 2016, 18:39
Lv12R is a rear sigle ported , our version is double front ported it function almost the same as the LVX12 and just smaller with a 300w amp , it target for new user enter into HT setup with very limited space to house a decent sub , yet wanted something more then just boom and it also capable of good music reproduction as it also come with servo drive.

Oh smaller also. very thoughtful bro.  this will be very suitable for SG's smaller homes compared to other countries. Thanks for working on a customised one just for sg.

Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on October 29, 2016, 06:59
On the other end of the size spectrum, Rythmik have also been very busy readying their flagships for 2017. Only the real hardcore ones will go for them. I hear the FV25HP is capable of going head-to-head with the the likes of Mark Seaton, JTR...etc.

Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 31, 2016, 21:08
Here you go the new LV12s,

(http://i308.photobucket.com/albums/kk329/ckpeng/LV12s%20front%20with%20grill_zpsfxx8rizq.jpg) (http://i308.photobucket.com/albums/kk329/ckpeng/Lv12s%20front_zpsyvaryaeq.jpg) (http://i308.photobucket.com/albums/kk329/ckpeng/LV12s%20rear_zpsp0dqzim8.jpg) (http://i308.photobucket.com/albums/kk329/ckpeng/LV12s%203D_zpsi6oqx20n.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on October 31, 2016, 21:13
Looks very nice!


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Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 31, 2016, 21:15
Just few inch taller then the F12 and target for HT use.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 31, 2016, 22:11
Here you go the new LV12s,

(http://i308.photobucket.com/albums/kk329/ckpeng/LV12s%20front%20with%20grill_zpsfxx8rizq.jpg) (http://i308.photobucket.com/albums/kk329/ckpeng/Lv12s%20front_zpsyvaryaeq.jpg) (http://i308.photobucket.com/albums/kk329/ckpeng/LV12s%20rear_zpsp0dqzim8.jpg) (http://i308.photobucket.com/albums/kk329/ckpeng/LV12s%203D_zpsi6oqx20n.jpg)

nice, what're the dimensions for LV12S?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 31, 2016, 22:54
W=402 /16.5"
D=478/19"
H=472/18.5"
32kg
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 31, 2016, 22:59
I hear the FV25HP is capable of going head-to-head with the the likes of Mark Seaton, JTR...etc.

I have the old version  F25 , when the new version ready will bring in also.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on October 31, 2016, 23:22
I have the old version  F25 , when the new version ready will bring in also.
Need to stand by to listen since same footprint as FV15HP right? Just taller


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Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 31, 2016, 23:32
Need to stand by to listen since same footprint as FV15HP right? Just taller
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Stack 2x E15HP can liao ,
Current E15HP ,F15Hp and Fv15HP and F25 all using same driver and same amp , new amp for F25 will be 800w ( not bring in as waiting for new version ).
F25 using one amp to drive 2 driver , yes 2 front driver taller( same like a stack of 808 ) ,but the depth shorter by few inch.This a sealed sub for extreme SPL just like the FV15Hp , but a ported sub rumble is very dif from a sealed sub and for that I still prefer the FV15Hp.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 01, 2016, 17:24
Lv12s ported side by side with F12 sealed
(http://i308.photobucket.com/albums/kk329/ckpeng/f12vsLv12s%20height_zpsad9zne2l.jpg)  (http://i308.photobucket.com/albums/kk329/ckpeng/f12vslv12s%20wide_zpservtpxsm.jpg)  (http://i308.photobucket.com/albums/kk329/ckpeng/f12vslv12s-side1_zpsvgbfbs6m.jpg)  (http://i308.photobucket.com/albums/kk329/ckpeng/f12vsLv12s%20depth_zpsjeetrdx0.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 01, 2016, 20:34
Need to stand by to listen since same footprint as FV15HP right? Just taller

better bring pole to hold tight, wait later kenna blown away by the monster  ;D ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 01, 2016, 20:37
W=402 /16.5"
D=478/19"
H=472/18.5"
32kg

Cool. Is the 19" depth with or without grill?

Below are the LV12R dimensions. :o Great work there to reduce space requirement. And its front ported. Save lagi more space.
16 (W)
19" (D) (20-1/2" D with grille and amplifier knobs)
22" (H)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 04, 2016, 18:09
Cool. Is the 19" depth with or without grill?
with grill
Great work there to reduce space requirement. And its front ported. Save lagi more space.
Not only save space with a price that low and with servo , now even entry level  you can have 2 servo sub to even out in room or create wind tunnel ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 04, 2016, 19:41
Power!
Title: Re: Official Rythmik Subwoofer Thread
Post by: mutant on November 04, 2016, 22:48
Went to listen to the LV12R. Bring my wife along as I also want LV, but the budget version. hehe..
Impressed with it. Will order and plan to put it upside down so the air blowing can be felt more.
Awaiting for the M.O to start.
And now thinking how I can do the running in for long hours without disturbing neighbours..   ;D
Thanks Peng!
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 04, 2016, 23:35
Went to listen to the LV12R. Bring my wife along as I also want LV, but the budget version. hehe..
Impressed with it. Will order and plan to put it upside down so the air blowing can be felt more.
Awaiting for the M.O to start.
And now thinking how I can do the running in for long hours without disturbing neighbours..   ;D
Thanks Peng!

You mean LV12S?

Get a pair bro, and experience Rythmik smoothened bass hehe
Title: Re: Official Rythmik Subwoofer Thread
Post by: mutant on November 11, 2016, 17:50
Yes! The M.O has just started.  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on November 24, 2016, 22:46
I have the old version  F25 , when the new version ready will bring in also.

Any indicative time on the arrival of the fv25hp? I'm quite keen to have a listen and readily be poisoned! Looks very convincing and have space for this beast in the hall. Only downside is USD keep going up up up! Things r getting more ex from states...
Title: Re: Official Rythmik Subwoofer Thread
Post by: mutant on December 06, 2016, 23:23
For running in a new ported sub, what are the efficient ways to do it without disturbing neighbours?
Thinking to crossover higher (etc 150Hz), run some heavy bass music on low volume for several hours, rest and repeat 3-4 times etc.?
Thanks.
Title: Re: Official Rythmik Subwoofer Thread
Post by: mutant on December 12, 2016, 14:30
Review of the LV12S.
After 6 hours of running in, do Audyssey calibration. Initial testing seems good. Surprisingly very slightly more "tighter" bass than my previous sealed 10 inch Def Tech sub; when using the High Damping setting.
Did another 8 hours of running in, and redo Audyssey. This time it sound slightly more better, the bass can go lower; when using Low Damping setting. Rear sub volume at 10 o'clock enough for Audyssey 76-78dB measurement.

Verdict. Great value & performance for a budget subwoofer especially at M.O price.
Thanks Peng for the free delivery and running in tips! Me still playing with the Damping adjustment  ;D


Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on December 12, 2016, 19:38
Welcome to the Rythmik club. You are starting to find out that Rythmik can really do wonders. But share your opinions after the honeymoon period.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on December 13, 2016, 08:03
Review of the LV12S.
After 6 hours of running in, do Audyssey calibration. Initial testing seems good. Surprisingly very slightly more "tighter" bass than my previous sealed 10 inch Def Tech sub; when using the High Damping setting.
Did another 8 hours of running in, and redo Audyssey. This time it sound slightly more better, the bass can go lower; when using Low Damping setting. Rear sub volume at 10 o'clock enough for Audyssey 76-78dB measurement.

Verdict. Great value & performance for a budget subwoofer especially at M.O price.
Thanks Peng for the free delivery and running in tips! Me still playing with the Damping adjustment  ;D

Happy that u are enjoying your rythmik sub bro =) welcome to the club haha

U know what r the recommended settings to use b4 and after audyssey right.... ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: mutant on December 13, 2016, 10:21
Happy that u are enjoying your rythmik sub bro =) welcome to the club haha

U know what r the recommended settings to use b4 and after audyssey right.... ?
Thanks Jag & Sevenz,
Before Audyssey is set to Low Damping rite? After it I still playing between all 3 modes; Medium seems like best compromise.
Not sure how much more hours needed to 'season' the sub.
I upped the Level from -6dB to -1dB.
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on December 13, 2016, 12:26
......
Not sure how much more hours needed to 'season' the sub.
I upped the Level from -6dB to -1dB.

Bro... wah it become very hot (5db high)... I wonder how many subws are you using it?
How about tweak your subw.. increase the gain knob by 1 or 2 steps up plus 2db high?
 ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on December 13, 2016, 13:29
Thanks Jag & Sevenz,
Before Audyssey is set to Low Damping rite? After it I still playing between all 3 modes; Medium seems like best compromise.
Not sure how much more hours needed to 'season' the sub.
I upped the Level from -6dB to -1dB.

yep, low before Audyssey. See guide here.

https://www.google.com.sg/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwj3-9_yt_DQAhURUI8KHUkdCf4QFggYMAA&url=http%3A%2F%2Fwww.avsforum.com%2Fforum%2Fattachment.php%3Fattachmentid%3D1584529%26d%3D1470350174&usg=AFQjCNFMbChyjIBDdwlRdYOgfQ91xfuikA&sig2=1lvaxANW2k1zy5pkxsRp-g&bvm=bv.141320020,d.c2I

Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on December 13, 2016, 18:22
As to the mode , is very personal , just play the sub with mid bass and hv a feel which you like most.do the same for some deep rumble and decide is your prefer...

increase from -10dbx to -5dbx  the gain is not the same as from 0db to 5dbx ,as db in not in linear form.

how much is hot , all depend on that person , a larger body can take more pressure before he feel the same then a thin body. a low blood pressure person will con off under 3G then faster then .....after audy . most added at least 3 or more db to feel their sub.

after all is what and how to get there of what you like as your own time and ..... ;)
Title: Re: Official Rythmik Subwoofer Thread
Post by: mutant on December 13, 2016, 21:46
Thanks Sevenz,
Just saw in AVSforum that LV12S model already talked about it in end July 2013.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on December 27, 2016, 08:33
Here is a simple guide from rythmik , hope it helps..if adjusting phase knob on subs other than 0 setting, one need to use the line in instead of LFE in....
(http://i1372.photobucket.com/albums/ag329/ronildoq/B8F5EDDC-C00F-4D2F-A7BB-AA11D70D9607_zpswrdnupkb.png)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 18, 2017, 18:13
Rythmik FV18/FV25HP update from FB:

We are trying to get the FV25/FV18 to the market. Most likely will be end of this year, or early Jan.
We have made a change to FV18 from 2 ports to 3 ports (in order to be competitive with new SVS offering). Two port tuning is around 12.5hz. 3 port tuning will be around 16hz. The extension filter setting will be 12hz, 14hz, and 18hz. The FV18 is 21"(W) x 33"(H) x 22"(D). The FV25HP is 21"(W) x 41"(H) x 22"(D). We will post the weight later.
FV18 uses 900WRMS amp and FV25 uses 1800RMS amp.
FV18 will be 2db higher output than FV15HP. More improvement is from below 18hz where port output is significant. The improvement is via port compression reduction in the following way. In data-bass test data, our compression is the lowest because the servo feedback adjust the amp output so the output of woofer cone always maintain the consistent frequency response. The only exception is below 18hz where port output becomes significant. Since there is no sensor on ports, compression data show the loss of output even after we maintain correct woofer cone movement. Our observation from the data is 1db additional compression loss for every 5db SPL increase until eventually the port wind noise takes over. So I expect to gain 1db more output just from lower port compression. So overall, it is 2db more output.
For FV25, we expect 6db more output above 30hz. The enclosure size is reduced by 30% per driver, but we have 50% more power from amp. So in the end each driver in FV25 has approximately same output as FV15HP in the baseline comparison. But the number of ports (and port area) increases from 1 to 1.5 (per driver), therefore it cuts down the compression loss slightly.
One interesting information of FV15HP by data-bass is the 12.5hz max output from FV15HP in 1 port mode is not limited by the 2nd order or 3rd order harmonic distortion like in other tests. This means the amp output is not the limiting factor. Instead it is the upper band noise which is caused by port noise. So how can be reduce that upper band noise and allow for a higher output number with 2nd or 3rd order distortion becoming the limiting factor? First, 50% more port area per driver does help and second, we will use a bit more internal sound absorbing material. So that can give us up to 3db output improvement (or up to 9db total output as I referred early in this thread) at 12.5hz point.
For FV25HP we have also tried 2 port mode which pushes the port tuning frequency to 10hz. It improves the music sound more obviously. The bass line becomes just more detailed. The arias in the opera house scene of MI5 (rogue nation) just gives me goose bumps.
The FV18 will be $1700 including freight shipping and the FV25HP will be $2450 including freight shipping. The FV25HP will be available in black matte paint and the FV18 in black oak vinyl.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on January 18, 2017, 21:33
Nice... thanks for sharing Bro

How which one u going for?! ;D ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 18, 2017, 22:09
Haha, poisonous ahhh this Rythmik fv25hp , combo with the dual KK 12s, dream combination... with added height bass combo Atmos, very very syok.

As it is now itself already feeling the air hitting the body, arms and sweeping legs, damn syok! Best part is don't need to crank to ridiculous levels to achieve that.

So so good this rythmik sub, I'm very confident in their products. This one comes with 3 ports!
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on January 19, 2017, 18:42
Looking fwd to hear the fv25 at your place next time  ;D ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 21, 2017, 17:55
For Anyone consider Rythmik sub , look out for our home demo programe cookin in Feb right after CNY. ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on January 21, 2017, 18:14
For Anyone consider Rythmik sub , look out for our home demo programe cookin in Feb right after CNY. ;D
nothing beats home demo!


Sent from my iPhone using Tapatalk
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 21, 2017, 21:48
For Anyone consider Rythmik sub , look out for our home demo programe cookin in Feb right after CNY. ;D

Is this for the fv25hp demo? If yes count me in!
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on January 21, 2017, 22:23
Nice. Got any special sub appearance?  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: durian345 on January 27, 2017, 10:56
Hi bro Peng. When is the showroom opening after cny? I like to check out the 12" subs. Planning for dual subs in my room
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 31, 2017, 13:47
Hi Peng / Jag,
One question on the Rythmik FV15HP. I have gone with a few combination of Single port, Two ports open. Both offer differing effects. It can be seen with measurement, the extension is all the way with one port open vs higher output with 2 ports open in the range of 20-40hz.

Question:
Port Air is stronger when one port is open. 2 ports open gives a significant rumbling effect, lesser air blowing. Having a different rising house curve changes the timing the port blows the air. I am wondering at which frequency the rythmiks fv15 blows the air? How are the rythmiks port blowing such strong wind? Does it mean that the subs are near its limit?

Your views pls. Thanks for your advice.

PS: I prefer one port open option, less rumbling (less annoying to neighbours) but more air blowing my feet, chest and sholders, feeling is just syokness overload with the rythmiks.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on January 31, 2017, 17:09
2-port mode : max port velocity at 18hz.

1-port mode : 12hz.

The port takes over at about ~25hz and below. When port noise occurs, it's a sign of subwoofer reaching its limit.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 31, 2017, 17:25
i see, so its 25hz and below. So port air blowing is actually port noise? i dont hear any noise but a strong gush of wind blowing. Is it normal? i felt that at your place too. i did measure for distortion and still have tons of headroom playing at levels -10/12. But i think the bass demo disc are slightly louder than the normal disc, not sure why.

Would it affect the drivers of the sub in the long run with the port air blowing? I have 1 port configuration but a steep rising house curve from 80 to 15hz, almost +12db. Or you reckon i should bring it down to +9db rising curve? ah i missed your post on the house curve
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 31, 2017, 18:28
The air presure from the port is where you feel the air pushing to you , is normal for ported sub .
port nosie is when the out rush air create turbulence around the exit point .kind of like flaping sound.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 31, 2017, 18:36
Is this for the fv25hp demo? If yes count me in!

This are for all the model we carry , as we want to do away with retaill demo as the best and easy way for a customer to decide which model and size will suit them , the only way is try it at their own setup .
As for the F25 , when the final production set ready we will do it in a current FV15Hp user's place and if he is willing , we will leave it there for ...... let me .
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 31, 2017, 18:37
Nice. Got any special sub appearance?  ;D
maybe .....
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 31, 2017, 18:44
Hi bro Peng. When is the showroom opening after cny? I like to check out the 12" subs. Planning for dual subs in my room

As I indicated from Feb onward we will only do home demo , as we want to do away retail demo and focus on our Acoustic treadment / upvc isolation windows and doors for our project work.

for 12" we will have 2 model to offer
1) F12 sealed main focus for Music or causaul Ht use.
2) Lv12s ported small size target for mainly Ht use.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 31, 2017, 19:05
Ok so it's normal. So nothing wrong with the air pushing. No flapping noise. So that's a relieve. so after <25hz is when the port takes over and relieve the woofer of some of its duties.

So now I know which freq to experiment with the house curve, thanks guys !
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 31, 2017, 19:07
yeah... I heard good thing about this sub...
I wonder whether my cabinet (width 40.50cm, Height 42.50 cm and Depth: 44cm) can take it ? 
:-\
if this of your measurement is refer to the space you have? just fit in.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on January 31, 2017, 19:16
How about typical gunshot frequencies? I am getting good punches and low rumbles with my new house curve but gunshot scene still lack shiokness.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 31, 2017, 19:22
Ok so it's normal. So nothing wrong with the air pushing. No flapping noise. So that's a relieve. so after <25hz is when the port takes over and relieve the woofer of some of its duties.

So now I know which freq to experiment with the house curve, thanks guys !

You can try to find its limit on your setup and location (depend very much of location) , around 17hz to experient port nosie and flapping, but hor must be very carefull and dont driver it for more the 30s ( if your sub is not run in sure can make the voice coil jump out wan) and will not be cover by warranty liao. ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 31, 2017, 19:23
How about typical gunshot frequencies? I am getting good punches and low rumbles with my new house curve but gunshot scene still lack shiokness.
time to re look at your center spk liao
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on January 31, 2017, 21:21
This is my current measurements Center+Sub. After DC house curve and Audy. No PEQ done yet. FV15HP+2xKK808
No matter which location i sit, i don't feel the gunshot shiokness. Any advice?
Green - Sofa1
Black - Sofa2
Red - Mid of 2 sofa

(http://i67.tinypic.com/2ykxduo.jpg)

No i couldn't test with Book of Eli yet cos both demo disk i burnt couldnt be read by oppo anymore:(
I tried with another gunshot scene from one of our demo disk.

Peng, what you mean by center speaker?  Currently crossed at 80hz which provided the smoothest response compared to 60/70hz.

I am hoping to identify the right freq to PEQ the problem away.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 31, 2017, 21:28
what external EQ you have and their Xover point and how the 3 sub was setup now ?
did you neasure their phase , look like you hv alot of low bass now.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 31, 2017, 21:37
technically i think bumping up the freq 60-66hz & 75-80hz should do the trick.... That will give you bullet thump effect, that can be the second house curve, the KKs can play very clean tight mid bass, no problem with the peaks introduced here... give it a shot. But your lows from rythmik is surprisingly off the charts, it should be rising up as it goes lower... something wrong there

(http://i1372.photobucket.com/albums/ag329/ronildoq/0676397C-E864-40D1-924D-4DADECA70777_zpsg6gku70h.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: joagib on January 31, 2017, 23:56
time to re look at your center spk liao

+1..
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 01, 2017, 00:27
This is my current measurements Center+Sub. After DC house curve and Audy. No PEQ done yet. FV15HP+2xKK808
No matter which location i sit, i don't feel the gunshot shiokness. Any advice?

Strange, your dual kk808 should be able to give u a good thump in the chest for gunshots... Few qns:

Are your KKs stacked? If yes, are they in phase?

How are your 3 subs connected to the 2 Antimode RCA inputs?

Can show how are ur subs placed bro?

And also, I assume they are level matched?

After u finish audyssey calibration, did u leave the subs' volume intact or was it adjusted?

Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on February 01, 2017, 08:33
There is a possibility that some may have grown used to exaggerated mid bass without EQ due to peaks in room. And the decay from bullet shot sound makes it feel real and natural. Don't forget each have their own pref for punch rumbling tactile feel etc.

Having said that, when u start to watch other scenes like closing a car door, and it gives u a thumping effect, that doesn't feel natural. when u close your car doors in real life, do u get thumping effect? Suddenly all midbass is heightened. The room starts to dominate the  subs, I come from the same kampong too, nothing wrong. That's why I prefer to introduce peaks at certain frequencies moderately, some minor peaks actually sound and feel better. I use the bullet scenes from the Atmos track "unbroken" , as I'm very much in love with the Atmos tracks, so I use those clips when tweaking the bass to my liking. The rythmiks rolls off at 60hz when using the line in input at my place. So that is perfect for my integration when KK takes over at 60hz to 100hz, but when using the lfe in, the freq goes all the way to 150hz, which wasn't to my liking as I wanted the rythmiks to focus on the lows with more headroom.

You can experiment high passing the KK but don't Low pass the rythmiks, use the line in input and give it a try, measure individual subs response and see what they r doing at their location, then share your post, the gurus can chime in. Corner placements normally gives u that extension while nearfield tends to smoothen out the bass, try with KK nearfield and rythmiks corners for maximum extension. I suspect your rythmiks r at midwall, that explains why the lows are not upward rising.

Goal will be get it to reference, then tweak to preference using house curves. Same for the rumbling and port air. I've just started 6 months ago and with my limited knowledge and experience, I have to go with some trial and error too. I'm experimenting with this now. < 25hz till 12hz on the rythmik, brilliant subs for the Low !
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 01, 2017, 09:20
@ronildoq - What do you mean by upwards slopping? I thought it is natural to be downwards slopping for anything below 20hz?

@econav - re look at your center spk means what huh?

Some background story. I do get good bullet feel before i recalibrate after adding the antimode DC to my setup. So i am aware what KK can achieve in my room. Previously i low pass the rythmik and after audy, I manually bump up KK and Rythmik vol to obtain good punch and low rumble. However, the problem is that the manually bumped up curve is not as smooth across the range and the SPL dip becomes obvious at certain scenes. Hence, I added DC to my setup (after poison at ronildoq house) to add more control to the overall FR. Here's my current settings:

Highpass KK @ 40hz (to avoid kk bottoming out at low freq due to my aggressive HC)
KK stacked - both 0 phase. Crossover knob set to highest 160hz. Gain at +6db
Rythmik - 180 phase. Crossover knob set to highest 120hz. 14hz/single port/high dampling. PEQ off.

KK on top left corner of room, rythmik on top right.
Level match on audy
Did not adjust vol knob on any sub after calibration.

I suspect if i bump up the spl btw 60-80hz should do the trick as bro ronildoq pointed. but i want to avoid too artificial vol increase to get the thump effect. Have not started playing with phase knob (or sub dist adjust).

Lastly, thanks to everyone who have chipped in ! Was too tired last night do check anything after a shag 3 days of CNY gambling!
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on February 01, 2017, 10:45

Some background story. I do get good bullet feel before i recalibrate after adding the antimode DC to my setup. So i am aware what KK can achieve in my room. Previously i low pass the rythmik and after audy, I manually bump up KK and Rythmik vol to obtain good punch and low rumble. However, the problem is that the manually bumped up curve is not as smooth across the range and the SPL dip becomes obvious at certain scenes. Hence, I added DC to my setup (after poison at ronildoq house) to add more control to the overall FR. Here's my current settings:

Highpass KK @ 40hz (to avoid kk bottoming out at low freq due to my aggressive HC)
KK stacked - both 0 phase. Crossover knob set to highest 160hz. Gain at +6db
Rythmik - 180 phase. Crossover knob set to highest 120hz. 14hz/single port/high dampling. PEQ off.

KK on top left corner of room, rythmik on top right.
Level match on audy
Did not adjust vol knob on any sub after calibration.

I suspect if i bump up the spl btw 60-80hz should do the trick as bro ronildoq pointed. but i want to avoid too artificial vol increase to get the thump effect. Have not started playing with phase knob (or sub dist adjust).

Lastly, thanks to everyone who have chipped in ! Was too tired last night do check anything after a shag 3 days of CNY gambling!

Hi bro...
I am still learning how to improve my subwoofers too...

In your background story (highlighted in blue)
At that point, is it consider level matching, or  gain (room) matching ?
Usually combine two subws (in one channel) will give +(3-4) db higher

Did you sweep your anti-mode DC first then followed by Audyssey? or the other way round?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 01, 2017, 11:00
Hi bro, all learning that's why post here learn together ma ;)

Level match to 75db during standard audy calibration.

I perform DC, then audy.
Title: Re: Official Rythmik Subwoofer Thread
Post by: durian345 on February 01, 2017, 12:15
As I indicated from Feb onward we will only do home demo , as we want to do away retail demo and focus on our Acoustic treadment / upvc isolation windows and doors for our project work.

for 12" we will have 2 model to offer
1) F12 sealed main focus for Music or causaul Ht use.
2) Lv12s ported small size target for mainly Ht use.

Ok. What are the pricings for the F12 and the LV12?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on February 01, 2017, 15:46
Ok. What are the pricings for the F12 and the LV12?

Local retail price
F12 direct servo sealed $1600+7%
Lv12s direct servo ported $1400+7%
Price inclusive of delivery and one time simple setup.
Rythmik warranty terms for 5 yrs on driver and we provide 2 yrs local service/repair/parts support.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 01, 2017, 20:29
I do get good bullet feel before i recalibrate after adding the antimode DC to my setup. So i am aware what KK can achieve in my room. @bro, one possibility could also be due to the fact that you are not used to the sound of the flattened peaks. Another is phase cancellation. When u play with the LIFT on HC, note that your midbass region will be 'reduced' too

KK stacked - both 0 phase.  @bro - Both 0 degrees may not mean they are in phase due to different batch of amp. Happened to my dual kk808s last time too. How did u check if they are in phase? The FR got +3-5db increase?

Rythmik - 180 phase. Crossover knob set to highest 120hz.  14hz/single port/high dampling. PEQ off.

Did not adjust vol knob on any sub after calibration. @ bro, just to share, usually this is the 'routine' must-do steps that i do:
1) After antimode and audyssey calibration, i will manually up the sub volume on the antimode vol or AVR vol till the midbass (guns & punches) feel shiok 1st.
2) Play with HC (LIFT only) until I feel low rumble is shiok.
3) Then repeat 1 & 2 again. Because when u apply LIFT, your midbass region reduces & u need to compensate


Level match to 75db during standard audy calibration. @bro, if u can, level match b4 antimode calibration. And u would also need to level match your 2 KKs because that can't be done via Audyssey as it is same RCA cable
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 01, 2017, 22:35
This is my scan before DC/Audy calibration.

RED - Stacked KK at 0/0 phase
BLUE - Stacked KK at 0/180 phase

Both KK are set to +6db on vol knob before calibration.They are combined at 75db at my MLP during audy calibration, so i did not need to adjust anything.

(http://i63.tinypic.com/2pzbq52.jpg)

i choose to leave at 0/0 phase as it looks the better FR. Anything abnormal here?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 01, 2017, 22:56
With added individual KK measurements
RED - Stacked KK at 0/0 phase
BLUE - Stacked KK at 0/180 phase
Orange - KK1 0 phase
PURPLE - KK2 0 phase

(https://s29.postimg.org/e5qkexd1j/KKphase.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 02, 2017, 00:47
With added individual KK measurements
RED - Stacked KK at 0/0 phase
BLUE - Stacked KK at 0/180 phase
Orange - KK1 0 phase
PURPLE - KK2 0 phase

(https://s29.postimg.org/e5qkexd1j/KKphase.jpg)

Yea RED looks correct =) awesome bro

Try increasing the sub channel volume by 1db steps to see if the gun shots improve?

Is your dyn eq on or off?
Title: Re: Official Rythmik Subwoofer Thread
Post by: iicecube on February 02, 2017, 00:49
Very hard to choose by good brands subwoofer but still quite overpriced.. haiz
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 02, 2017, 09:02
Yea RED looks correct =) awesome bro

Try increasing the sub channel volume by 1db steps to see if the gun shots improve?

Is your dyn eq on or off?

Currently I am using TILT and LIFT function on DC to boost the area. I will find time to do the vol adjustment on AVR tonight and see what changes it do to the FR and bullet feel. As mentioned previously, I am getting solid donnie yen punches and underworld rumble now. This gunshot feel just not there .. strange!
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on February 02, 2017, 09:51
This is my scan before DC/Audy calibration.

RED - Stacked KK at 0/0 phase
BLUE - Stacked KK at 0/180 phase

Both KK are set to +6db on vol knob before calibration.They are combined at 75db at my MLP during audy calibration, so i did not need to adjust anything.

i choose to leave at 0/0 phase as it looks the better FR. Anything abnormal here?

Bro,
Seems you are using gain (room) matching which was measured at 75db (combined) towards MLP.
I wonder whether level matching  will be better so each of your subw will have equal power  when they are sweeping all frequencies?

Place all your subwoofers in the middle of your room (coz we don't want room gain)
Make sure no 'trim value' on your AVR (set at zero) then adjust gain knob until you get 75db/each (I prefer 78db) with REW or place SPL meter close to the subwoofer driver.
XT32 will give you additional boost 3-4 db higher reading bcoz of two KK combined... (you can ignore it)
Proceed with Audy calibration.... minus value will be given accordingly then you can adjust to your liking with REW's help.

What do you think? does it make sense?
 :D
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 02, 2017, 10:36
I think you are saying to perform gain matching instead of level matching? This is my understanding of the definitions.

Gain match - when you bring sub to mid of room (no wall boundary gain) and place mic close to the driver and measure output to 75db. Perform same steps for all subs in room.
Level match - when you place mic at MLP and measure level output to 75db (contains any potential room gain)


I think i tried gain matching (KK1, KK2, fv15hp to 75db) in the past. And iirc when combined the stacked KK reads 85db during audy calibration (they are both linked to sub1 output on avr). Rythmik (sub2) reads 78db after gain matching on mlp.  Not sure if +10db higher (than 75db) is acceptable to produce good audy results? Any comments?
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on February 02, 2017, 10:52
I think you are saying to perform gain matching instead of level matching? This is my understanding of the definitions.

Gain match - when you bring sub to mid of room (no wall boundary gain) and place mic close to the driver and measure output to 75db. Perform same steps for all subs in room.
Level match - when you place mic at MLP and measure level output to 75db (contains any potential room gain)


I think i tried gain matching in the past. And iirc when combined the stacked KK reads 85db during audy calibration (they are both linked to sub1 output on avr). Rythmik (sub2) reads 78db after gain matching on mlp.  Not sure if +10db higher (than 75db) is acceptable to produce good audy results? Any comments?

oh ok... haahaa.. I understood wrongly
thanks for your correction.

I read from forum so long wont exceed -12 then should be fine lor.
Perhaps can try to cross your C at 90 or 100 hz  ;D
 :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on February 02, 2017, 13:53
This is my current measurements Center+Sub. After DC house curve and Audy. No PEQ done yet. FV15HP+2xKK808
No matter which location i sit, i don't feel the gunshot shiokness. Any advice?
Green - Sofa1
Black - Sofa2
Red - Mid of 2 sofa

(http://i67.tinypic.com/2ykxduo.jpg)

No i couldn't test with Book of Eli yet cos both demo disk i burnt couldnt be read by oppo anymore:(
I tried with another gunshot scene from one of our demo disk.

Peng, what you mean by center speaker?  Currently crossed at 80hz which provided the smoothest response compared to 60/70hz.

I am hoping to identify the right freq to PEQ the problem away.

Bro, what is the Rythmik response, alone? Dont forget DC will try to eq them flat, if you go dual mono, it will eq them as 1. if you go 0.2 stereo, it will eq them individually. The latter is preferred. Audy SubEQ HT does the same and will further EQ the subs as 1 after applying individual filters. So before you proceed with any calibration, u need to know what they are doing at their location and at what gains. You will also need to know what happens after you high pass them? and how steep you filter them? 12db/24db octave 40hz hp on KKs?

first measure the Rythmiks alone. then measure KK alone at its place. KK stacked. then KK stacked + rythmiks. Then post your graph. As regards to your question pertaining a rising house curve, what it means is this.

After u calibrate your subs using DC and Audy to flat, you build your house curve. technically, for HT purpose, a rising curve from 65hz to 15hz with a +6-9db rise is quite syok. Look at this graph as an example, it has a +9db rising curve from 80hz to 30hz, +9db. without even listening at his place, i can tell u his bass is superb. As you go higher from 30-100hz, it gets louder when you run a sine sweep. In order to have this balanced, a rising house curve is very pleasant. That will bring out the beast in the Rythmiks. My curve starts from 60hz all the way to 10hz, focus on the rythmiks. For the KKs, there are some peaks at 66-68hz, i did not eq away as i had my centre cross over at 60hz.

(http://i1372.photobucket.com/albums/ag329/ronildoq/rising%20house%20curve_zpsmgzrss4o.jpg)

The above pic is what i meant by low Freq rising curve. Make sure the rythmiks are doing this, as when you dial in a hard knee curve, the rythmiks will start to work. The graph below is when 2 ports are opened. I have recently gone with the 1 port option, it extends further down to 12hz. I can tell you the syokness level and sensation is totally different at Ultra Low freq. I have brought it up a notch after your last visit. Now still studying on Port Tuning thingy. Jag says port takes over at <25hz for the FV15HP

(http://i1372.photobucket.com/albums/ag329/ronildoq/Rythmik%20No%20Aud_zpsmb15kctn.jpg)

After your CNY gambling over, time to upgrade to FV25HP!! ahahhahaa, huat arrrrrrrrrrr
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on February 02, 2017, 18:11
I tried with another gunshot scene from one of our demo disk.

Peng, what you mean by center speaker?  Currently crossed at 80hz which provided the smoothest response compared to 60/70hz.

I am hoping to identify the right freq to PEQ the problem away.

3 thing to try and test.
using the same disc and play the same track for the test,

test 1
power off only Fv15Hp , how you find the gunshoot sound as compare to both sub ON ?

test 2
power off only stack of kk 808 , how sounded ? more boom then hit ?

test 3
power off both Fv15Hp and stack of 808 , how you find the same gunshoot sound ?  is the gunshoot very well define from the center channel now ? are they sound tin and small or become sharp ?

sound check  8)

Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on February 02, 2017, 18:40
If u get the bass and integration right with the centre channel, not only your rumbles, punches and sweeping bass will be syok, the Atmos channels will make your jaw drop. Layers after layers of bass, so good! Best part is u don't need to annoy your Neighbours and can still enjoy good bass, that for me is very important.

Look at what rythmiks r doing, get it to a spot where it peaks at the Low, then the spot for KK where it peaks at the midbass, combine it and the rest is history... audy and dc will do its job... confirm u will be smiling.... your Wife might think u go gila ! Lol
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on February 02, 2017, 18:47
With added individual KK measurements
RED - Stacked KK at 0/0 phase
BLUE - Stacked KK at 0/180 phase
Orange - KK1 0 phase
PURPLE - KK2 0 phase


from the chart your 2 808 are working fine , you can hv the top 808 turn 180 and measure it you can see the cancelation and understand that how it sounded and how the chart will look like , then do the measurement with the center spk to see the dif and change of sound when the phase is not in syn. focus around 60-90hz area.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on February 02, 2017, 19:22
(http://i1372.photobucket.com/albums/ag329/ronildoq/Subs%20Comparison_zpswmjmsjmd.jpg)

Look at that SPL at 12.5hz 1 port open for the FV15HP. How clean it can go at 12.5hz, used to be top, but now overtaken by other brands. RBH 1212 sound, this is the updated chart for 2015 above.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 02, 2017, 19:44
Currently I am using TILT and LIFT function on DC to boost the area. I will find time to do the vol adjustment on AVR tonight and see what changes it do to the FR and bullet feel. As mentioned previously, I am getting solid donnie yen punches and underworld rumble now. This gunshot feel just not there .. strange!

Play with the sub volume and the HC to see if it 'comes back'. Hope to hear good news =)

What's your AVR crossover frequencies bro

And, do u use dyn eq?
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 02, 2017, 19:46
(http://i1372.photobucket.com/albums/ag329/ronildoq/Subs%20Comparison_zpswmjmsjmd.jpg)

Look at that SPL at 12.5hz 1 port open for the FV15HP. How clean it can go at 12.5hz, used to be top, but now overtaken by other brands. RBH 1212 sound, this is the updated chart for 2015 above.

Must see what's their distortion at those outputs. Rythmik's distortion is quite low even with such high output at the ulf region ;)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on February 02, 2017, 20:10
The bandwidth uniformity for the rbh is +-4db, quite impressive the numbers, but how it sounds and the sonic signature, that's a different story... hahaha
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on February 02, 2017, 21:03
Sevenz bro, these subs are all measured according to CEA2010 method. So the SPLs reported are max SPLs allowed before distortion levels exceed CEA2010 limit thresholds.

Rythmik is one of the top. I doubt folks here would not even consider to buy the smaller FV15, let alone the RBH 1212r.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 02, 2017, 21:07
Sevenz bro, these subs are all measured according to CEA2010 method. So the SPLs reported are max SPLs allowed before distortion levels exceed CEA2010 limit thresholds.

got it, thanks bro Jag.

Correct me if I'm wrong, this will mean that even if there were output at certain ULF, and if distortion exceeds the CEA thresholds, they would 'no count' it right....?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 02, 2017, 22:30
Play with the sub volume and the HC to see if it 'comes back'. Hope to hear good news =)

What's your AVR crossover frequencies bro

And, do u use dyn eq?

LCR crossed at 80hz. Yes dyn eq is enabled.
Yeah I will try all the above recommendations on weekend. Just hosted some friends at home no time to try anything tonight.

Thanks to all and happy new year!
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 02, 2017, 22:34
3 thing to try and test.
using the same disc and play the same track for the test,

test 1
power off only Fv15Hp , how you find the gunshoot sound as compare to both sub ON ?

test 2
power off only stack of kk 808 , how sounded ? more boom then hit ?

test 3
power off both Fv15Hp and stack of 808 , how you find the same gunshoot sound ?  is the gunshoot very well define from the center channel now ? are they sound tin and small or become sharp ?

sound check  8)



Thanks Peng. Will try and post back. :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on February 02, 2017, 22:52
got it, thanks bro Jag.

Correct me if I'm wrong, this will mean that even if there were output at certain ULF, and if distortion exceeds the CEA thresholds, they would 'no count' it right....?

They would indicate the highest SPL just before the measurement fails the CEA2010 threshold.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on February 03, 2017, 07:30
LCR crossed at 80hz. Yes dyn eq is enabled.
Yeah I will try all the above recommendations on weekend. Just hosted some friends at home no time to try anything tonight.

Thanks to all and happy new year!

There could be cancellations by the mains when integrating the subs. How did u conclude with 80hz XO? Or just follow the audy recommended guide and XO 80? Looking at your graph red line, there is a dip at the 80hz region, maybe u wanna try crossing at 60 and see how it goes. Best is if u can measure to see if they are cancelling.

If u r using a house curve from DC, turn off the dynamic eq on avr. Another thing before u run DC, turn compensation off, that would allow more headroom when u build your house curve
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on February 03, 2017, 21:24
Hi,new member first post,I am running dual E15hp plus duel F12 using antimode dual-core to eq them.Just like to know for sub ch only if you measure with REW are the graph identical to antimode corrected respond graph?
Thanks.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 03, 2017, 21:47
There could be cancellations by the mains when integrating the subs. How did u conclude with 80hz XO? Or just follow the audy recommended guide and XO 80? Looking at your graph red line, there is a dip at the 80hz region, maybe u wanna try crossing at 60 and see how it goes. Best is if u can measure to see if they are cancelling.

If u r using a house curve from DC, turn off the dynamic eq on avr. Another thing before u run DC, turn compensation off, that would allow more headroom when u build your house curve

So if using hc, we have to turn off dynamic eq? below graph all measured with dynamic eq on.

C+SUB at different crossover

BLACK - cross at 80hz
ORANGE - cross at 60hz
GREEN - cross at 40hz

(https://s29.postimg.org/qfnjxb2lz/crossover.jpg)

No matter which i choose it will dip at 80hz. I also tried measuring cross at 90hz and similar results. Any suggestions?
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on February 03, 2017, 22:16
Hi,new member first post,I am running dual E15hp plus duel F12 using antimode dual-core to eq them.Just like to know for sub ch only if you measure with REW are the graph identical to antimode corrected respond graph?
Thanks.

Similar in shape but not identical,.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on February 04, 2017, 07:39
Hi Jag,thanks for the reply.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 04, 2017, 09:24
So if using hc, we have to turn off dynamic eq? below graph all measured with dynamic eq on.

C+SUB at different crossover

BLACK - cross at 80hz
ORANGE - cross at 60hz
GREEN - cross at 40hz

(https://s29.postimg.org/qfnjxb2lz/crossover.jpg)

No matter which i choose it will dip at 80hz. I also tried measuring cross at 90hz and similar results. Any suggestions?

Bro, can u overlay another 2 FR into this graph so that we can see how much it cancel away.

C+sub w 90hz xover
C only (speaker configuration = big)
All subs only (don't put xover)

Remove the C+sub 40hz FR


Will it b beter to start a separate thread for this bro since this is heading towards tweaking ur bass =)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 04, 2017, 09:34
So if using hc, we have to turn off dynamic eq? below graph all measured with dynamic eq on.

Nothing to do with HC or not bro.

Below is what dyn eq do to the bass..

But boosting is one thing, normal for Audyssey to boost freq. But see how the FR changes.

Dyn EQ = ON.
Notice how Dyn EQ tries to 'pin' the bass @ 20-30hz, same SPL no matter the change in main volume on the AVR
So imagine you are listening at x MV, then you want more low rumble say 20-25Hz region, and increase MV to x+10 or x+5. What will you hear?

(https://lh3.googleusercontent.com/6qTJpJAPetrKJHHH7qsTzHRZfljyx3T75iTsrBtsJwsYktv2nDAkw1yhL1jTlUufZ8ZF0kn2zjNNl2YQceFHLbKHpN1EfypbjtVLSOyYZWk90pYQ48W8UpWM0wXfEqEPDPVnGHAq0BioioyxZORp10D8OUlgp0-EBRsn1u7bXGEnUMzT1I4MHNmPj0Vf31e2l5zBfAhw5oGvDH-0HhtgPhJ5gbKMYa4QwgqCSs3pCARuEtBFKb4OciQQcEPHsB7RgG7mkH6CAeCniEC5hGR6BWsqBU-aAf9cFo6evZvyhtULtvWeunmLZ7FKWxcTIaOmWzoU3gIt9baoSdW09A2RNn9YwVSQRrzmr1VMhMEFXDOoAQtrW8VQzR74i4VLY72GmHDw_WonMz5cvc-HQZaPhUA_jyRPlaNq1AVrEE34v86TTVbHsAyZcayKQsnDYdf0sE_Ekf0w0Vbw9eZ7p3hk8BUjxZJm7x9ivkH24P1174ovzT9h7KD9XA0x_dQkf_r9AuigrGexMaasbsi-Nj64ycMBP7nIJ8FUABwUH87C4z9g2I3uLOl81nVkvtrmoKvI4EZfTanM0m7f3BG6q_N_KchPjqc2B-E8fVmY_AIKd_1S14mS=w1000-h491-no-tmp.jpg)

Next:
Dyn EQ = OFF.
Notice that:
- the curve changes linearly in proportion as you change the Main Volume of the AVR.
- so the higher volume u listen to, the bass will increase proportionally.
(https://lh3.googleusercontent.com/ZM1GhDVm3DwG9QON-tTTteYlYGKatWTuV-E2Ib03DSI3V87mqhMKuWZCRNS3kGTz3VFYv-22m-Jqx4cvOKjJM84yn5YAuPDPl0eepsRKCgF7mExzztWFwbAzAi9k0zt-ucsl36VUnfi5eD8CzBWfg8edpEOIfpcPDHwlPfyNelHetgFURFURpzQoSB3Nu9kMZ6mCwqs4sKt0sgUysUj8EYVig0xopurkPqkOHjoBPU5jVeR8FzCtOjiKIN9GzAi672RYLwdiEei2otJXUOiopES5sZKn0ZzS4gt2ovj1mgkY4Yq4YC_J-YJjiX1jlaRofJgxBmUGlAQK7t_E1-76agGJB8CfpzAN-eriXo8ZEaFUplOb8Fu8ndEoNygmfmINGkdJO-L1R6jpReOuN1vJEsCJO5IQjLPJy-qr_5ZF_qib08xm5w2txxKkbLYPgiLElMkGPzNUKjzI3mkL6WbPi5wuGHM86Z2n3MZlNS_e61oVB3GTo-Ke1ZQrXZa3bPQZQ51ho9zid9FqXf6jRxI6nh1l5Ia2Cg91jotxVz3tb7oTdTcBX-NwVrTwzkt-7Ayb1V3ywrKf90rBVDhtYUvcjdIvFcN7GJ9-EQe350IH01J5yrn4=w1000-h491-no-tmp.jpg)

So.... now that u observe this, which setting you think is better for sound logically?   ;D ;D 

U decide
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on February 04, 2017, 09:50
Exactly why I avoid using Dyn EQ and I continue to recommend not using it. Not so great when it's designed cut bass when we need it.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on February 04, 2017, 10:24
This is my scan before DC/Audy calibration.

RED - Stacked KK at 0/0 phase
BLUE - Stacked KK at 0/180 phase

Both KK are set to +6db on vol knob before calibration.They are combined at 75db at my MLP during audy calibration, so i did not need to adjust anything.

(http://i63.tinypic.com/2pzbq52.jpg)

i choose to leave at 0/0 phase as it looks the better FR. Anything abnormal here?

What r the rythmiks doing at its location without eq. U can check by switching off all eq on the avr, turn dyn eq off, dynamic vol off , xt32 off, then on the DC press the bypass orange key (I think) then measure and see what they r doing first. This means all eq filters are off. It looks like the Rythmiks would be better at the place the KK is located. With the dips in midbass, that would work towards your "preferred" taste. U can see the KK"S r rising back up at the Low 15hz then down again... so looks like that's a nice spot there for the rythmiks.

Both subs r in phase, that is not the main issue, even if they r out of phase, the dc will introduce delays to get it in phase, so that's not the problem. Problem is the location, post both subs location before eq. Choose the best alternative where lows r strongest with rythmiks and mids strong or no dips for KK before any EQ. (60-100hz)

Another thing u might like to explore with KK rythmiks combination. Try nearfield placement for the KK, driver facing MLP. Trust me, no turning back after that.

Location, location, location... that is the key! Get it right, the rest leave it to the brilliant software to do its job.....
Title: Re: Official Rythmik Subwoofer Thread
Post by: wechnivag on February 05, 2017, 10:33
Hi,new member first post,I am running dual E15hp plus duel F12 using antimode dual-core to eq them.Just like to know for sub ch only if you measure with REW are the graph identical to antimode corrected respond graph?
Thanks.
Hi Bro! First post, welcome!! I think many missed the fact that you have 4(!) Rythmik sealed subs! Wow!

Please tell us more about your setup!

Sent from my X9009 using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 05, 2017, 12:55
Welcome bro ngsk to xp. Wow That's a lot of subs haha.

U are so lucky. Many of us limited by our spouse  :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on February 05, 2017, 20:21
Hi,new member first post,I am running dual E15hp plus duel F12 using antimode dual-core to eq them.Just like to know for sub ch only if you measure with REW are the graph identical to antimode corrected respond graph?
Thanks.

WOw...  :o you placed at 4 corners huh?

Surely you got smooth FR sweep from 15hz to 200hz.
Wont mind to share with us bro?
 ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 05, 2017, 21:49
2 for mid bass, 2 for low bass

Power combo :D
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 05, 2017, 22:14
An update to my weekend tweak:

1. Tried mid bass scene with KK alone, Rythmik alone, and combined. Conclusion is i much prefer KK sound signature n speed for mid punch. Hence, i added 3db to KK on AVR, and reduced the TILT on DC.

2. Re-measured and switched rythmik phase from 180 to 90. This is to minimise overall low end cancellation effect below 35hz.

3. Disabled dynamic eq
 

I ended up with a sound that i am familiar with, and even better than my previous effect before adding antimode. Got punch, got rumble, got feel, got authority, with no obvious dips. Will spend more time doing fine tuning. Maybe add more LIFT or lower bit of TILT.

Below is my current graph. Notice the hump from 50 to 80hz :D
(https://s30.postimg.org/8butt4nv5/HT_final.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 05, 2017, 23:35
An update to my weekend tweak:

1. Tried mid bass scene with KK alone, Rythmik alone, and combined. Conclusion is i much prefer KK sound signature n speed for mid punch. Hence, i added 3db to KK on AVR, and reduced the TILT on DC.

2. Re-measured and switched rythmik phase from 180 to 90. This is to minimise overall low end cancellation effect below 35hz.

3. Disabled dynamic eq
 

I ended up with a sound that i am familiar with, and even better than my previous effect before adding antimode. Got punch, got rumble, got feel, got authority, with no obvious dips. Will spend more time doing fine tuning. Maybe add more LIFT or lower bit of TILT.

Below is my current graph. Notice the hump from 50 to 80hz :D
(https://s30.postimg.org/8butt4nv5/HT_final.jpg)

Happy for u that the sound is getting better. From what you mentioned, means u like the kk midbass thump ;)

By the way, your lower region bass between 15hz-50hz looks unusually low with the FV15HP bro. TOO LOW. FV15HP is more capable than that and can give u very shiok chair shaking rumble.

My advice is: Try dialing in the below curve shape (BLUE LINE) bro. Essentially, 20hz should be hottest, then as it moves to higher freq, it should be a straight line down to 90/100hz. The AIM is to have your 20hz, 30hz, 40hz, .... 90hz, all sounding the same physical loudness at MLP TO YOUR EARS (notice i did not say using SPL meter). Then, keeping this HC shape, increase your sub volume to the thump u want. Then tell us how it sounds to you  ;)

(http://www.hometheatershack.com/forums/attachments/rew-forum/1289d1454701164t-house-curve-options-correction.jpg)

by the way, after u disable dyn eq, usually u have to up the sub ch volume (together on all subs) until the midbass sounds shiok again.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on February 05, 2017, 23:48
Bro Rafale, that's a 10db peak at 55hz. But if that extra peak is something you like, that's perfectly fine.

Kk808 have very little output below 30hz compared to fv15hp. So there is very little cancellation between KK and FV below 30hz since th FV will dominate the FR below this point. Unless poor placement of the FV sub results in weak bass.

Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 06, 2017, 07:13
Happy for u that the sound is getting better. From what you mentioned, means u like the kk midbass thump ;)

By the way, your lower region bass between 15hz-50hz looks unusually low with the FV15HP bro. TOO LOW. FV15HP is more capable than that and can give u very shiok chair shaking rumble.

My advice is: Try dialing in the below curve shape (BLUE LINE) bro. Essentially, 20hz should be hottest, then as it moves to higher freq, it should be a straight line down to 90/100hz. The AIM is to have your 20hz, 30hz, 40hz, .... 90hz, all sounding the same physical loudness at MLP TO YOUR EARS (notice i did not say using SPL meter). Then, keeping this HC shape, increase your sub volume to the thump u want. Then tell us how it sounds to you  ;)

(http://www.hometheatershack.com/forums/attachments/rew-forum/1289d1454701164t-house-curve-options-correction.jpg)

by the way, after u disable dyn eq, usually u have to up the sub ch volume (together on all subs) until the midbass sounds shiok again.


The current midbass thump is at the max level I can take. So usually my next step to fine tune is to try lowering the hump bit by bit to the point where punch still shiok (to me) while keeping the hump smallest.

I did not up rythmik trim level up on avr after audy. Should I do that or increase LIFT on antimode? Current LIFT settings is at 5. Noticed at 20hz, it is already +8db compared to FR > 100hz. How much should be ideal?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on February 06, 2017, 07:27
Bro Rafale, that's a 10db peak at 55hz. But if that extra peak is something you like, that's perfectly fine.

Kk808 have very little output below 30hz compared to fv15hp. So there is very little cancellation between KK and FV below 30hz since th FV will dominate the FR below this point. Unless poor placement of the FV sub results in weak bass.



Sub is corner loaded at top right of room. Unfortunately that's then only placement in my small room. I will try increments on LIFT level to bump up the Low bass.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on February 06, 2017, 08:20
Thanks all bros for the welcome.Yes E15hp at front corner 9fts from LP,F12 rear corner 3fts away crossover at 100hz on antimode dc.Cal 1 E15 plus 1F12 as 1pair for L&R. According to the AM corrected respond from 150hz all the way down there is only a dip on around 60hz,if take -6db as ref line the dip is around 8db more which is my room mode center of L&R.As for my setup no avr or avp using Opp 105 to drive 3x Parasound a23 amp to power 3 pair of KEF speakers ref203/2 front r700 surround r300 rear surround not using center speaker as only one seat and L/R speaker just 5.5 fts apart,Opp sub out to AM for sub eq.Romm size is under 1200 cubic fts,just a simple setup with a 55 inch tv.
Title: Re: Official Rythmik Subwoofer Thread
Post by: wechnivag on February 06, 2017, 10:40


Thanks all bros for the welcome.Yes E15hp at front corner 9fts from LP,F12 rear corner 3fts away crossover at 100hz on antimode dc.Cal 1 E15 plus 1F12 as 1pair for L&R. According to the AM corrected respond from 150hz all the way down there is only a dip on around 60hz,if take -6db as ref line the dip is around 8db more which is my room mode center of L&R.As for my setup no avr or avp using Opp 105 to drive 3x Parasound a23 amp to power 3 pair of KEF speakers ref203/2 front r700 surround r300 rear surround not using center speaker as only one seat and L/R speaker just 5.5 fts apart,Opp sub out to AM for sub eq.Romm size is under 1200 cubic fts,just a simple setup with a 55 inch tv.

Hi Bro ngsk, that's an amazing setup you have!

I have a question about your sub pairing. Typically guides advise to pair subs if they are similar distances to the listening position, ie in your case both fronts E15 as 1 pair, and both rears F12 as 1 pair. However this does lose the stereo bass effect which you are targeting.

The reason for pairing by distance is improve phase matching of the subs. Did you have to set the distance/phase manually to match the E15/F12 pair before running the antimode calibration? Did you try both ways of pairing and decided this is best?

Sorry for the many questions. My subs are currently set up as front and rear pairs, it does make sense to try them as stereo LR pairs. Looking forward to your feedback!

Sent from my X9009 using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on February 06, 2017, 12:38
HI,due to the 6fts different to LP the +4db advantage of E15 is offset,front subs phase 0 I adjust the phase on the F12s to get a flatter respond,take alot of time tweaking.As for stereo effect it no affected when playing 2ch music bass sound like coming from L/R speaker.I did not try pairing E15 or F12 is the output will be different,and I think the AM output L&R from rca is pair with xlr L&R output means L or R output on AM are pair 1rca and 1xlr,this make thing easier for me as my E15 only have rca input,I use xlr for F12.The sub gain are all around 12 o'clock,after AM cal all sub measure around 65-70 db at LP combine around 80db use AM to increase vol to around 85db as Oppo doesnot boost the sub ch +10db.Maybe if you can help post some photo that will clear thing up.Do pm if you wish.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 21, 2017, 23:28
heads up for those who plan on getting new Rythmik subs, econav posted a pre-order thread in HT sales section. :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 01, 2017, 15:58
Feb pre-order started collection today,
(http://i308.photobucket.com/albums/kk329/ckpeng/1%20March%202017%20Rythmik_zps7gfjwsrj.jpg)

Thanks for All your support
Title: Re: Official Rythmik Subwoofer Thread
Post by: deadrick on March 03, 2017, 12:29
Just collected my preordered rythmik lv12. Still running in!
Previously using other lousy cheap sub, got bass but really no shiokness during bass scene.

Nw my sofa can shake during bass scene. Quite happy with it.

Funny thing is i bought an antimode to control peaks for my old sub. This sub actually measure almost flat til a peak at 65hz.
Its so different from other cheap sub where so many null n peaks across all freq.

Sent from my MI NOTE LTE using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: Hillviewer on March 03, 2017, 14:02
Yesterday, at the beginning of the first battle scene, my bookshelf glass doors shake violently. I have to watch at a lower volume the rest of the movie  :'(
So I need the help of a few brother-in-law to move the bookshelf to upper level.
To do that, I have to host the mother-in-law birthday dinner at my house.

I guess that my rythmik E15HP pairs have ran in after 2 months and Audyssey did its job well.  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 03, 2017, 14:43
Just collected my preordered rythmik lv12. Still running in!
Previously using other lousy cheap sub, got bass but really no shiokness during bass scene.

Nw my sofa can shake during bass scene. Quite happy with it.

Funny thing is i bought an antimode to control peaks for my old sub. This sub actually measure almost flat til a peak at 65hz.
Its so different from other cheap sub where so many null n peaks across all freq.

Sent from my MI NOTE LTE using Tapatalk

Thanks for your support.

This Lv12s is EQ/design in that way beside a good freq respone and control from the direct servo driven driver , we wanted it have abit more on the puchy mid-bass in a very small form factor and yet enough to move air and well control rumble , after a 50 hrs run try some 2 channel and you will  :o 8)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 03, 2017, 14:46
I guess that my rythmik E15HP pairs have ran in after 2 months and Audyssey did its job well.  ;D

Then is time to re-do all over again for Audy,have fun lor..... ;D 8)
Title: Rythmik LV12s home loan
Post by: econav on March 03, 2017, 14:49
The home loan will start from today till next saturday.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on March 03, 2017, 16:25
Just collected my preordered rythmik lv12. Still running in!
Previously using other lousy cheap sub, got bass but really no shiokness during bass scene.

Nw my sofa can shake during bass scene. Quite happy with it.

Funny thing is i bought an antimode to control peaks for my old sub. This sub actually measure almost flat til a peak at 65hz.
Its so different from other cheap sub where so many null n peaks across all freq.

Sent from my MI NOTE LTE using Tapatalk

Welcome to the rythmik owners group bro! =)

With the Antimode,  u can make it shine even more! Are u on single or dual sub?

 Enjoy ur rythmik sub!
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 03, 2017, 18:03
Few whatsapp me and asked what is the condition for home testing ?
No condition or string attach,all you need is sign up and give us your adr and we will send you the sub for testing or compare to what you already have.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on March 03, 2017, 18:24
Im looking forward to the FV25hp, is that in?
Title: Re: Official Rythmik Subwoofer Thread
Post by: deadrick on March 04, 2017, 11:52
Welcome to the rythmik owners group bro! =)

With the Antimode,  u can make it shine even more! Are u on single or dual sub?

 Enjoy ur rythmik sub!
Single sub only, space constraint not easy to add on 1 more sub, and the lv12 is already bigger than i expected.
some bass scene im abit scared all the vibration will disturb my neighbour above me.. lol.
Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on March 18, 2017, 17:11
Single sub only, space constraint not easy to add on 1 more sub, and the lv12 is already bigger than i expected.
some bass scene im abit scared all the vibration will disturb my neighbour above me.. lol.
when your neighbour bang your door means money well spent!  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on March 18, 2017, 17:24
Single sub only, space constraint not easy to add on 1 more sub, and the lv12 is already bigger than i expected.
some bass scene im abit scared all the vibration will disturb my neighbour above me.. lol.

How do u find your lv12s so far? =)
Title: Re: Official Rythmik Subwoofer Thread
Post by: joagib on March 18, 2017, 21:17

Neighbour directly below you get 80% shiok.
Neighbour beside you get 50% shiok.
Neighbour above you get zero or 20%,only abit shiok
Title: Re: Official Rythmik Subwoofer Thread
Post by: CASH on March 18, 2017, 21:39
+1
Because that's exactly what happened when I had the bass demo in my HDB house..
Only the clown under my unit came up to quiver with the building shake!!
Hehehehe!!!
 ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: Chowbotak on March 18, 2017, 23:27
Neighbour directly below you get 80% shiok.
Neighbour beside you get 50% shiok.
Neighbour above you get zero or 20%,only abit shiok
Title: Re: Official Rythmik Subwoofer Thread
Post by: joagib on March 19, 2017, 00:35
Tats about correct I think. Good thing I got sound reduction works done on my hifi room's floor.  The only time in my life where a neighbour knocked on my door has nothing to do with music or movies.
Naked & Drunk Chio Bu arh
Title: Re: Official Rythmik Subwoofer Thread
Post by: Chowbotak on March 19, 2017, 00:38
I wish    ;D She told me tat my creaking door was freaking her out
Title: Re: Official Rythmik Subwoofer Thread
Post by: cleadett on March 19, 2017, 20:05
Bro,
When I read this model performace
http://www.rythmikaudio.com/F12_specs.html

@ 20hz : 4db
@ 30 hz : 7db before getting flat curve then roll off @ 80hz then drop @100hz for 5db and further down

Can't be so bad this model ler so
Pls help... how to read F12 performance
 :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on March 19, 2017, 20:08
Bro,
When I read this model performace
http://www.rythmikaudio.com/F12_specs.html

@ 20hz : 4db
@ 30 hz : 7db before getting flat curve then roll off @ 80hz then drop @100hz for 5db and further down

Can't be so bad this model ler so
Pls help... how to read F12 performance
 :)

What this graph shows is the frequency response of the subwoofer.

What it does NOT show is the SPL levels that before begins to distort. Is this freq response at 75dBc or 105dBc? This info is not stated.

The chart does not show the response when the sub is pushed to your listening levels.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 20, 2017, 04:27
Bro,
When I read this model performace
http://www.rythmikaudio.com/F12_specs.html

@ 20hz : 4db
@ 30 hz : 7db before getting flat curve then roll off @ 80hz then drop @100hz for 5db and further down

Can't be so bad this model ler so
Pls help... how to read F12 performance
 :)
that is the very old version , you should take ref from that of PEQ2 and the current version is PEQ3 even more flat down.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Soul108 on March 20, 2017, 08:50
hi econav... tried emailing you and pm you but couldnt get you
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on March 20, 2017, 09:49
hi econav... tried emailing you and pm you but couldnt get you
If you can make some efforts to locate his thread, his mobile is posted there. Isn't that faster vs pm?


Sent from my iPhone using Tapatalk
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 20, 2017, 12:02
hi econav... tried emailing you and pm you but couldnt get you
Sorry , i did't receive any email/pm ?
Anything that I can help ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 20, 2017, 12:05
If you can make some efforts to locate his thread, his mobile is posted there. Isn't that faster vs pm?


Sent from my iPhone using Tapatalk
I no no leh , lately few say they pm me , but I no receive leh and mail box also got clear leh.
but is sure my inbox can get full very fast.
Title: Re: Official Rythmik Subwoofer Thread
Post by: cleadett on March 20, 2017, 12:48
that is the very old version , you should take ref from that of PEQ2 and the current version is PEQ3 even more flat down.

Bro,
Thanks for this info but I couldn't find it so hope you wont mind to post it here so I can see how flat is flat and
also DBSPL output compare to JL Audio E112 subs especially at around 15hz up to 120hz region.

http://www.audioholics.com/subwoofer-reviews/e-sub-e110-e112/e112xograph.jpg/image_view_fullscreen
From this web, I can fully understand how to read JL's FR performance but still not sure about Rythmik
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 21, 2017, 03:33
you can just look at the fig 1.1 F12 PEQ2  on the rythmik site.
F12 is not design to just go loud in the first place , it was design for audiofile and easy integrate with 2 channle as use of the direct servo, as time go by some like it to be more puch with for ht use , so PEQ 3 was impetment for ht with better mid bass punch.
If you are lookin for really ruler flat take a look at the  F113 .
data bass forum hv lot of info for you to compare bass, base on spec/paper.
do a seach at AVS forum lot of compare Rythmik vs JL and other.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 23, 2017, 16:54
Shipment for March come in and collection start now for E15HP, the rest will follow.
You should received text for date and time indication for collection.
(http://i308.photobucket.com/albums/kk329/ckpeng/IMG_9251_zpsnc6q4ehm.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 27, 2017, 02:23
We are planning to ship this model LVX12 again, as factory going to have a production run in Apr and this will be the only chance to follow my shipment for this LVX12 to save you some money , as we are bring in the stock we need till Oct next production run.

For those who already home demo/loan, as indicated here you go pre-order start soon.
http://www.xtremeplace.com/yabbse/index.php?topic=92309.msg1136002#msg1136002
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on March 27, 2017, 14:18
Here is the tones available for running in that subs. Peng, 50 hours to burn in the rythmik subs before we start any EQ or calibration?

http://www.audiocheck.net/testtones_brownnoise.php
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 27, 2017, 14:42
50 hours to burn in the rythmik subs before we start any EQ or calibration?
before anything on EQ and also calibration , as no point beco the surround/edge of the rubble and castket have not loosen up and the respon not that linear yet.
Is also good to have it run for the first few hrs with some korean pop ( now aday korean pop hv some good deep low rumble , as is music play , heat won bult up as fast compare to tone/noise).

Be very Carefull when using noise gernator as signal to run in any sub , dont power it more then 30% as some programe have 3-6 db burst ,that can burn the voice coin out of shape casue by heat bult up too fast in any new driver.
when you run in your sub for the first 5 min with any signal just feel the heat on the driver or surround rubble and it should be just abit warm.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on March 27, 2017, 14:45
yes, i would normally play some music with it. But just curious how long should this go before we start the EQ process? So you reckon using tone to run in the subs is not a good idea? I recalled Ken the owner of Kreisel mentioned using a run in CD to run in the KK subs in the past. But i never got that CD in the end, so i just used the tones at medium levels to run in the subs.

By the way, how to tell if the subs are fully burn in? or rather in a position where it is ready for EQ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 27, 2017, 15:26
In the production line driver go thru some form of  ( brown noise ? if i rememble it correct ) burst test to check the seal/casket/surround.

if you have 2 same driver and one is totally new and the other run for 50 hrs burn in process , just touch the surround/suspension you can feel it , the new driver is harder and not so elastic and that of burn in once should be more easy for press in and return to shape and also feel soft to touch.

for Bass driver ,if you start from Zero hrs and listen to it non stop, after 4/5 hrs. you can feel that after the first few hrs is become smoother and not as harsh for kick drum.( it only started the run in process from here onward )
rumble will be flat out within 60% of the power ( In a control testing and monitor lab , dont do this at home ) , at home if your sub not fully run in it will not reach it lowest and you may get some funny hit the bottom sound. but a run in sub give a much faster stop/start feel ( some call it not so boom... )

Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on March 27, 2017, 19:51
In the production line driver go thru some form of  ( brown noise ? if i rememble it correct ) burst test to check the seal/casket/surround.

if you have 2 same driver and one is totally new and the other run for 50 hrs burn in process , just touch the surround/suspension you can feel it , the new driver is harder and not so elastic and that of burn in once should be more easy for press in and return to shape and also feel soft to touch.

for Bass driver ,if you start from Zero hrs and listen to it non stop, after 4/5 hrs. you can feel that after the first few hrs is become smoother and not as harsh for kick drum.( it only started the run in process from here onward )
rumble will be flat out within 60% of the power ( In a control testing and monitor lab , dont do this at home ) , at home if your sub not fully run in it will not reach it lowest and you may get some funny hit the bottom sound. but a run in sub give a much faster stop/start feel ( some call it not so boom... )

Good info. Learnt something new. Thanks for this peng
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on March 28, 2017, 08:10
Yes Peng was spot on,when I first got the e15hps(1.5 year ago) they sound 'hard' to me I can tell they sound different from the f12s(own them coming to 4 years) but after few months non stop few hours a day listening to music,I can't hear any different anymore even crossover at 100hz can't locate them.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on March 28, 2017, 08:20
In the production line driver go thru some form of  ( brown noise ? if i rememble it correct ) burst test to check the seal/casket/surround.

if you have 2 same driver and one is totally new and the other run for 50 hrs burn in process , just touch the surround/suspension you can feel it , the new driver is harder and not so elastic and that of burn in once should be more easy for press in and return to shape and also feel soft to touch.

for Bass driver ,if you start from Zero hrs and listen to it non stop, after 4/5 hrs. you can feel that after the first few hrs is become smoother and not as harsh for kick drum.( it only started the run in process from here onward )
rumble will be flat out within 60% of the power ( In a control testing and monitor lab , dont do this at home ) , at home if your sub not fully run in it will not reach it lowest and you may get some funny hit the bottom sound. but a run in sub give a much faster stop/start feel ( some call it not so boom... )

Thanks peng for the detailed explanation above..so you think 50hrs of burn in would be enough for the New rythmik LVX12  sub? I think my Uncle will be keen to get the lvx12 ported servo sub pairing the KK808 instead of the small Brother LV12S, following your shipment order,  looks like a good deal. I'll get in touch with you soon. Thanks a lot!
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on March 30, 2017, 16:50
Just finished running in my fv15hp.

My wife immediately frowned at the size although I camouflaged the sub. Lol  ;D

SQ is AWESOME, lots of headroom and grunt but yet clean bass. One of the best ported subs i've heard. Should have gotten this earlier man haha

Thank u peng for bringing in Rythmik subs.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 30, 2017, 18:01
Just finished running in my fv15hp.

Not yet , still need more time ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on March 30, 2017, 19:01
Not yet , still need more time ;D

Haha okok..  ;D In 2 weeks time I will calibrate again.

Now running house curve to move the woofer more thru deep bass keke...
Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on April 02, 2017, 20:56
My wife immediately frowned at the size although I camouflaged the sub. Lol  ;D

my sisters all thought my F12 is a side cabinet for years  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: Hillviewer on April 03, 2017, 11:03
It took almost for a month for my wife to finally "discovered" the E15 as I put it between a 500m deep cabinet and an acoustic panel.

It would have longer if the E15 is dark brown. So I urge Rythmik to have dark brown option in the future...heheeee.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Chowbotak on April 03, 2017, 18:33
My Fv15hp is smack right in the middle of my hall. Told my wife not to touch it. Threatened my cats not to paw it. Anyway its wrapped in plastic when not in use ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on April 09, 2017, 12:55
It took almost for a month for my wife to finally "discovered" the E15 as I put it between a 500m deep cabinet and an acoustic panel.

It would have longer if the E15 is dark brown. So I urge Rythmik to have dark brown option in the future...heheeee.

Can use wood stain to do this though it won't look as real. But she would discover it when u are staining it lol
Title: Re: Official Rythmik Subwoofer Thread
Post by: Hillviewer on April 10, 2017, 10:27
I will tell her that I am staining a cabinet  ;D..

Btw, When she discovered it, she asked why did not get Walnut veneer.
Not sure whether SQ will be affected if I get a carpenter to do it.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Hillviewer on May 12, 2017, 14:31
 Currently my setup is
1. one E15 on the right of left front speaker. My left and right speaker is 120 inch apart. Just outside the 120 inch projector screen.
2.  one E15 on the right of the rear surrond. My rear surround is about 2m meter apart.

:'( The E15 was happily hidding next to a 50cm deep cabinet and protruding out just a bit. But now due to some living room redesign, the deep cabinet is to be removed and replace with a narrow cabinet around 40cm. Now the E15 stands out and wife said it have to go. What would be my best options?

1. Move the E15 to next to the front right speaker.
2. Sell the E15. Get a smaller same brand 12" subwoofer like L12.
3. Sell the E15. Get a even smaller difference brand like DXD-808.

My concern on 2 and 3 is whether it is easy to do blend in 2 subwoofer of different size for a layman. I am using denon 6300.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on May 13, 2017, 01:24
Currently my setup is
1. one E15 on the right of left front speaker. My left and right speaker is 120 inch apart. Just outside the 120 inch projector screen.
2.  one E15 on the right of the rear surrond. My rear surround is about 2m meter apart.

:'( The E15 was happily hidding next to a 50cm deep cabinet and protruding out just a bit. But now due to some living room redesign, the deep cabinet is to be removed and replace with a narrow cabinet around 40cm. Now the E15 stands out and wife said it have to go. What would be my best options?

1. Move the E15 to next to the front right speaker.
2. Sell the E15. Get a smaller same brand 12" subwoofer like L12.
3. Sell the E15. Get a even smaller difference brand like DXD-808.

My concern on 2 and 3 is whether it is easy to do blend in 2 subwoofer of different size for a layman. I am using denon 6300.

If space allows, go for (1) bro. Whats the dimension of your room and can attach a pic of your layout? Thanks
Title: Re: Official Rythmik Subwoofer Thread
Post by: Hillviewer on May 13, 2017, 02:17
Yes. There is space at option 1
Title: Re: Official Rythmik Subwoofer Thread
Post by: sypderman88 on May 19, 2017, 12:15
Hi,

 How much is FV25HP locally ? Thanks

Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on May 19, 2017, 22:28
Weight : 105kg
Class H : 2000W RMS
Part Sourcing: China
Assembly: USA
Port Tuning: 12hz 3ports, 10hz-100db<--syok ahhhhhh
Cost for one: US$2500
Cost for duals: US$4750
Indicative pricing above, very nice this sub... has got the height, interesting

local pricing check with none other except Peng...
Title: Re: Official Rythmik Subwoofer Thread
Post by: r0n1n31 on May 20, 2017, 09:01
Weight : 105kg

I think you mean lbs
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on May 20, 2017, 11:41
I think you mean lbs
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on May 20, 2017, 20:50
Kg confirm.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on May 21, 2017, 16:28
Some pictures to salivate you ;D

FV25HP 2x15" 2x1000w
(http://i308.photobucket.com/albums/kk329/ckpeng/Mobile%20Uploads/4BA9B696-99E4-48FE-80CA-CF09871CB125_zpsv9nwrrc4.jpg) (http://i308.photobucket.com/albums/kk329/ckpeng/Mobile%20Uploads/FC012F30-A718-4509-BBE3-FF71A1EFA07A_zpsrt0kh4wr.jpg)

FV18HP 1x18" 1x 1000w
(http://i308.photobucket.com/albums/kk329/ckpeng/Mobile%20Uploads/D32D2C76-1937-4B0D-A10B-CF89634A2DDF_zpssezedr44.jpg) (http://i308.photobucket.com/albums/kk329/ckpeng/Mobile%20Uploads/4B4EF589-75D5-4B69-B38F-25C694DE2ABB_zpsblvnz443.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on May 21, 2017, 23:23
So who wants to get a sub that's bigger than some washing machines?

(https://uploads.tapatalk-cdn.com/20170521/cf6d457cd334d41cd2630c0f2d8d1c94.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on May 21, 2017, 23:30
Monster !!! Me! I'm considering.... for more headroom... I get very nice strong port air blowing with the fv15hp even at Low volumes, but sacrificed a bit on the response, I think this beast will plug that hole! Shipping alone will cost a bomb, 105kg! But very tempted as the height bass can improve a fair bit with Atmos tracks ...
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on May 22, 2017, 07:31
Getting past the Mrs is going to be a big hurdle ! Unless it's hidden somewhere in the corner between some bookshelves , good luck getting that approval ! Hahaha
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on May 22, 2017, 11:18
Getting past the Mrs is going to be a big hurdle ! Unless it's hidden somewhere in the corner between some bookshelves , good luck getting that approval ! Hahaha

Any Mrs that approves it, tolerance level super high lor.... cos its footprint is very tall & prominent.
Title: Re: Official Rythmik Subwoofer Thread
Post by: r0n1n31 on May 23, 2017, 17:54
Kg should b correct. My B&W N801 is 102kg per piece so not surprising.

Sorry i thought its FV15HP lol
Title: Re: Official Rythmik Subwoofer Thread
Post by: finind on May 27, 2017, 20:24
preparing for 七月歌台?  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: amakusaray on June 03, 2017, 08:10
Anyone know how to but their amp plate ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on June 03, 2017, 11:34
Rythmik does NOT sell individual plate amps to individual. You need to buy together with woofer.

Their plate amps are designed specifically to go with their servo feedback woofer.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on June 05, 2017, 14:39
Here they are for the LVX12 , ready for collection .
(http://i308.photobucket.com/albums/kk329/ckpeng/IMG_0633_zps0hlmmlkd.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 19, 2017, 10:21
There will be a production run for FV18HP and i am getting few for project , anyone want to follow my shipment PM .
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on September 19, 2017, 10:41
Wow wow!!! :) who are the lucky owners
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 19, 2017, 02:27
E15HP vs FV15HP vs FV18( final production model )

(http://imagizer.imageshack.us/v2/1024x768q90/923/vGcEry.jpg)

Guess , where is the F25 ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 20, 2017, 10:38
Size vs Size  Anyone want to try at home text me ;)
(http://imagizer.imageshack.us/v2/1024x768q90/924/p9OPK0.jpg)

Title: Re: Official Rythmik Subwoofer Thread
Post by: BUGSY on October 23, 2017, 18:21
Got picture of the FV25HP ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 25, 2017, 12:54
pic , few post up.
F18 test by data-bass,
http://data-bass.com/data?page=system&id=145&mset=171
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on October 29, 2017, 00:04
FV18

http://data-bass.com/data?page=system&id=146
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on November 01, 2017, 00:10
FV25HP

http://www.data-bass.com/data?page=system&id=147
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 01, 2017, 08:37
Looks like very good review for their new subs. Impressed.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 23, 2017, 01:42
Here you go ,
(http://imageshack.com/a/img923/4899/aqmga3.jpg)
(http://imageshack.com/a/img922/2917/cuRI3C.jpg)
perperation for sending out
(http://imageshack.com/a/img923/5162/FGfaBD.jpg)
delivery started for Nov follow shipment,
(http://imageshack.com/a/img922/9713/DHpzQx.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on November 23, 2017, 13:03
 :o

looking forward to reviews from users....
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on November 23, 2017, 13:59
Cannot imagine how it will feel to have 2 x FV25HP pressuring the room :D
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 23, 2017, 14:11
come joint me for the setting up of 2xFV18HP+1xFV25HP at 2pm.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 23, 2017, 14:15
Cannot imagine how it will feel to have 2 x FV25HP pressuring the room :D

you want to try having 2xFV25HP ,let me know before monday as after that have to send to site liao.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on November 23, 2017, 14:25
I msg you privately

Sent from my S8 using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: sdds on November 23, 2017, 16:57
2 x f25 can generate a lot of room pressure 👍
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 23, 2017, 17:26
he want to expand his room size by using air presure i think ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: ralfale on November 23, 2017, 18:11
http://www.audioholics.com/subwoofer-reviews/rythmik-f18-fv18-fv25hp

High performing subs, but these babies are huge!
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 23, 2017, 18:22
and heavy 110kg for FV25
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on January 05, 2018, 19:07
Anyone bought and tested the new models fv18 and fv25 yet? Looking fwd to hear impressions and reviews =)

US forums seem to indicate very good reviews
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 06, 2018, 17:53
you lookin for me ;D
(https://imageshack.com/a/img922/2266/cXu0RF.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on January 07, 2018, 01:20
monster sub

think the bass pressure and tactile will be top notch man...
Title: Re: Official Rythmik Subwoofer Thread
Post by: soundaudio on January 07, 2018, 11:39
Owned the Rythmik sub and very suitable for audio and HT.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 07, 2018, 13:56
monster  ??? not really for this ;D

(https://imageshack.com/a/img924/6987/OTPEjr.jpg)
(https://imageshack.com/a/img922/5407/FkCEU4.jpg)
(https://imageshack.com/a/img923/13/bKg2Sc.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on January 07, 2018, 22:57
monster  ??? not really for this ;D

(https://imageshack.com/a/img924/6987/OTPEjr.jpg)
(https://imageshack.com/a/img922/5407/FkCEU4.jpg)
(https://imageshack.com/a/img923/13/bKg2Sc.jpg)

 :o :o :o

This calls for a sub shootout soon with the new Rythmik toys keke
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 08, 2018, 15:32
yes , just did that vs FV18HP for how low is low it can goes and how loud can it reproduce.
yes , just did that vs DXD 808 and DXD 12012 and sub 3 for mid bass impact and recovery of cone speed.

All done without any boundary gain. ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on January 08, 2018, 18:50
Which is louder AND lower?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 09, 2018, 08:31
yes , just did that vs FV18HP for how low is low it can goes and how loud can it reproduce.
yes , just did that vs DXD 808 and DXD 12012 and sub 3 for mid bass impact and recovery of cone speed.

All done without any boundary gain. ;D

How is your findings ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 09, 2018, 11:52
Which is louder AND lower?
lower > FV18HP
impact > F25HP
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 09, 2018, 11:54
How is your findings ?
Not compare to which is Best , but to find out which house curve we want for the new sub for production use ( local ).for a given price point.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 09, 2018, 12:30
Not compare to which is Best , but to find out which house curve we want for the new sub for production use ( local ).for a given price point.

I see, which target curve did you guys ended up with? and that sounds best for the FV18hp?
Title: Re: Official Rythmik Subwoofer Thread
Post by: wechnivag on January 09, 2018, 14:32
you lookin for me ;D
(https://imageshack.com/a/img922/2266/cXu0RF.jpg)
Which sub is this?

Sent from my X9009 using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on January 09, 2018, 19:12
lower > FV18HP
impact > F25HP

Thanks peng. Impact meaning.... ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 11, 2018, 23:00
I see, which target curve did you guys ended up with? and that sounds best for the FV18hp?
FV18HP was done last year May and final production start delivery in Sep.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 11, 2018, 23:06
Which sub is this?
Sent from my X9009 using Tapatalk
twin 12" sealed 600w servo , pre production set.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 11, 2018, 23:09
Thanks peng. Impact meaning.... ?
The feel of Punch without any boundary gain . ( how fast the cone recover )
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 12, 2018, 08:25
FV18HP was done last year May and final production start delivery in Sep.

I meant target curve for the house curve you used in your assessment of the subs, not the target delivery of the subs.

Did u use a house curve that starts with 100hz rising to 20hz +6db? Or 8db, 10db? The target curve in the sub shootout session.

Or something like 65hz rise ending at 10hz with +6db, 8db .... etc

And which sounded best for the fv18hp
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 12, 2018, 12:57
I meant target curve for the house curve you used in your assessment of the subs, not the target delivery of the subs.

Did u use a house curve that starts with 100hz rising to 20hz +6db? Or 8db, 10db? The target curve in the sub shootout session.

Or something like 65hz rise ending at 10hz with +6db, 8db .... etc
For all this are user define , for their personal and liking and still very much subject to the site condition and room gain.

For testing and production , is a set of pre-define measurment for compare of with/without boundary gain and it sounded very dif , from there we pick up some of the feq point ( board level ) , most if not all, active sub have this in the circuit design ( pre/gain control,not user but factory preset ) some are using this to protect the driver . unlike a passive sub , only a driver in the box  ,you can get as powerfull, as flat respone amp as you can and use full scale EQ box to get it as flat as you want and if that run out of headroom you still can change the amp , but for a active comsumer sub have to work within a given limit and cost for a given product.( as most have very limited EQ or non )

for all this we are testing to find out the limit , heat for our common given room type in Sg and a target grounp of comsumer and cost and is just production , sometime we also have custom model just for local market.

To asnwer your Q , I like the feel of 20hHz downward and still it have room for almost +4 db headroom , if you like a boot as infrasonic/subsonic which ever ppl called it , to me as this FV18HP are design to reproduce very deep low at higher SPL then that of the FV15Hp and a servo control 18" really make that dif feel.

By the way, for this round is not testing the FV18HP or the F25HP but the new twin 12" for production planning.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 12, 2018, 13:10
And which sounded best for the fv18hp

I can loan you a set and you compare it ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 12, 2018, 13:24
(https://imageshack.com/a/img922/2266/cXu0RF.jpg)

This is a pre production Twin 12" sealed direct servo control New model.
Anyone want to test it at their home let me know soon.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 12, 2018, 13:26
I can loan you a set and you compare it ?

Yes that would be nice, if you dont mind, so i can compare it against the seaton F18. Just a side by side single F18 vs single FV18hp, that would be a fair comparison, at same location same spot, same levels.

Need to establish if the Fv18hp can produce similar goosebump feel, the attack and deep bass, together with the sub signature.

Nice... Ill whatsapp you
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 12, 2018, 13:31
Yes that would be nice, if you dont mind, so i can compare it against the seaton F18. Just a side by side single F18 vs single FV18hp, that would be a fair comparison, at same location same spot, same levels.

Need to establish if the Fv18hp can produce similar goosebump feel, the attack and deep bass, together with the sub signature.

Nice... Ill whatsapp you
let me know , i am heading to east and if you hv a trolley to push it up to your place will help alot ;)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 12, 2018, 13:50
let me know , i am heading to east and if you hv a trolley to push it up to your place will help alot ;)

Yes i do have a trolley, will see u soon, check your whatsapp.
Title: Re: Official Rythmik Subwoofer Thread
Post by: wechnivag on January 12, 2018, 23:02
twin 12" sealed 600w servo , pre production set.
Ooh, sweet!! This is based on the LVX12?

How does the paper /fiber cone 12in compare to the aluminium 15in and 18in in terms of speed and punch?

Sent from my X9009 using Tapatalk
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 12, 2018, 23:31
Ooh, sweet!! This is based on the LVX12?

How does the paper /fiber cone 12in compare to the aluminium 15in and 18in in terms of speed and punch?

Sent from my X9009 using Tapatalk
hard to compare and say , as in dif size , if to compare it to the F12 that use a Aluminiun cone  and also sealed , I am safe to say , this is more punchy and produce much higher SPL that on par with the DxD 808 stack with propert EQ setup.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 12, 2018, 23:35
(https://drive.google.com/uc?export=download&id=1c6ejZR3BeIvM0MqKB2Lwr_Ry4u7-yGaH)

Ok seaton F18 ready to take on Rythmik Fv18hp

Both subs fully run in, ready for some goosebump action...


Sent from my iPhone using Tapatalk
Title: Re: Official Rythmik Subwoofer Thread
Post by: reno77 on January 23, 2018, 13:14
Can I get the lv12r locally in a 240v version ? ..and how much will it cost?
Title: Re: Official Rythmik Subwoofer Thread
Post by: BUGSY on January 23, 2018, 16:50
Can I get the lv12r locally in a 240v version ? ..and how much will it cost?

WhatsApp Peng @ 96387418  for enquires...
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 31, 2018, 15:05
Will be collecting back The FV18HP , anyone want to play with it let me know , as i may able to send to you after i collect it tonight.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on February 07, 2018, 11:26
Here you go the new twin 12" vs KK 808 side by side.

(https://imageshack.com/a/img923/1408/oj8J3h.jpg)     (https://imageshack.com/a/img924/5075/blxlKE.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 07, 2018, 18:58
What model will/is the twin 12"
Title: Re: Official Rythmik Subwoofer Thread
Post by: audiovideo on April 09, 2018, 16:27
hard to compare and say , as in dif size , if to compare it to the F12 that use a Aluminiun cone  and also sealed , I am safe to say , this is more punchy and produce much higher SPL that on par with the DxD 808 stack with propert EQ setup.

Is getting the LVX12 can be considered as a slight "upgrade" to F12 bought 5yrs ago?

Title: Re: Official Rythmik Subwoofer Thread
Post by: darlynvcs on April 10, 2018, 10:57
By looking at the price range, both are about same price.
Nope, just a change of sound and feel nia... 1 is ported the other is sealed just a preference of which you are into.


Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 10, 2018, 17:17
Is getting the LVX12 can be considered as a slight "upgrade" to F12 bought 5yrs ago?
F12 is targeted to Music lover, as a sealed sub very good for Musicail playback and casual HT use.
Nowaday HT are high res also and we need more for the rumble within a given price tag, so we intro this LVX12 which is a ported version of 12" that will go lower and higher SPL on the lower range of freq , so to say HT come first for the LVX12.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 10, 2018, 17:18
just a change of sound and feel nia... 1 is ported the other is sealed just a preference of which you are into.
Well say and Thanks,
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on April 11, 2018, 08:06
Is getting the LVX12 can be considered as a slight "upgrade" to F12 bought 5yrs ago?

If u are more on music,like how the F12 sound n want more output can added 1 more to run dual sub or move up to a E15hp otherwise go port for HT like Peng said for better $/db,LVX12 have 4db more output @20hz E15hp 5db more compare to a F12 according to Rythmik website.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 30, 2018, 04:17
Anyone keen for the L12?(https://uploads.tapatalk-cdn.com/20180429/e6cb431e0a839bd79913151fd6e7ac87.jpg)
(https://uploads.tapatalk-cdn.com/20180429/1a3b13e9dd0ad43cd511460e21371a40.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on April 30, 2018, 08:21
Any planing to bring in the F18?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on April 30, 2018, 08:37
Clearing today , ready for the May day fun.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on April 30, 2018, 13:36
Any planing to bring in the F18?

F18 liao!! Deep bass syok hor? different type of level for 18' subs. hehe, enjoyed my session with you last sat, thanks for all the highlights and explanation in the process, cheers!
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on April 30, 2018, 19:01
F18 liao!! Deep bass syok hor? different type of level for 18' subs. hehe, enjoyed my session with you last sat, thanks for all the highlights and explanation in the process, cheers!

Yes go big or go home life is short no time to waste on waiting but still need to know the cost first.Likewise enjoy your system very much end up 'hijack' it during demo sorry about it bro.






Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on April 30, 2018, 19:16
Yes go big or go home life is short no time to waste on waiting but still need to know the cost first.Likewise enjoy your system very much end up 'hijack' it during demo sorry about it bro.

Haha, no problem man! Glad u enjoyed all the deep bass, deep deep syok la! Next round I go visit u Liao,check out your KEF with the 4 rythmiks, I like the KeF sound too, perfect pairing with the parasound, good choice . And thanks for all the demo material, all good quality stuff, cheers bro!
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on June 01, 2018, 10:39
Sold all the 4 subs,waiting for the shipment for the dual F18s. So can't do any demo till I get the F18s  n set-up/cal. properly.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on June 01, 2018, 18:34
So exciting... Haha

But this few weeks will feel like forever keke  ;D ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on June 01, 2018, 20:04
I will cut the wait by air freight in next week ;)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on June 01, 2018, 21:10
I will cut the wait by air freight in next week ;)

Thank u,the waiting is killing me.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on June 02, 2018, 15:18
I’m continually amazed at how Rythmik subs perform in both music and HT. I wish I could demo mine but will be difficult.
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on June 02, 2018, 23:22
I’m continually amazed at how Rythmik subs perform in both music and HT. I wish I could demo mine but will be difficult.

hmmm Jag u own FV18 or Fv25 now? :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on June 02, 2018, 23:50
hmmm Jag u own FV18 or Fv25 now? :)

I now am a very satisfied owner of dual FV25HPs in my HT. These subs have given me sufficient headroom to deliver full ear-pressurising infrasonic bass. (to put it in numbers, >125dBc at 10hz)
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on June 03, 2018, 00:08
I now am a very satisfied owner of dual FV25HPs in my HT. These subs have given me sufficient headroom to deliver full ear-pressurising infrasonic bass. (to put it in numbers, >125dBc at 10hz)

omg... dual Fv25HP - that 4 x 15 ....the first here.... must be immersive ear-pressurising sia. how r them vs your ex dual fv15hps

Running with both subs @2 ports open ?
Saw that with rumble filter with -6db @10hz - it have the 3 port operation to control cone excursion in the subsonic range.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on June 03, 2018, 00:47
I run at 3 port mode to minimize port noise.

Frankly speaking, the dual FV25 AND Crowson Tech Motion Actuators AND Dirac is a ver y magical combination. Sounds like a sealed sub, but infrasonics is unreal.

I normally watch movies at -20db, so I don’t go loud. But the energy from <20hz infrasonic bass is jaw dropping, wide smiling amazing. This is th best bass, so I’m done with bass upgrades. The next upgrade will be a nice laser projector.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on June 03, 2018, 10:11
Nice... For u to say very magical , it must be a huge improvement from your last setup w the fv15 and antimode. :) Muz hear the difference one day keke..

Is it easier to get HT time now that your little one is older?

I get only like 1-2hr in a month now, max. HT time become baby time lol (which is great and very satisfying)..
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on June 03, 2018, 10:44
I run at 3 port mode to minimize port noise.

Frankly speaking, the dual FV25 AND Crowson Tech Motion Actuators AND Dirac is a ver y magical combination. Sounds like a sealed sub, but infrasonics is unreal.

I normally watch movies at -20db, so I don’t go loud. But the energy from <20hz infrasonic bass is jaw dropping, wide smiling amazing. This is th best bass, so I’m done with bass upgrades. The next upgrade will be a nice laser projector.

Very nice jag! Good to hear that. Very satisfying indeed once u have ample headroom the entire system will be in different league, including the rest of the speakers, so much flexibility with Dirac .

How is the house curve like ? Which curve sounded best at your place ?

I’m also waiting for PJ upgrade, just finished my journey with calibrating the OLED screen, next target will be year end upgrade for laser Pj when prices are affordable. lotsa nice material in HDR and Dolby vision. Wait and looking forward to your  recommendation for PJ as well
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on June 03, 2018, 11:09
Expose baby to music. My 1yr old boy has been listening to music before he was born. So now, when I play those music, he actually sits still and listen intently. Else fidgets endlessly. And if he listens for long enough, he sleeps. Then thats when I sneak in half a movie while he sleeps. Volume at -23dB, so bass under normal calibration methods will sound anaemic. So use a aggressive house curve with crowsons will return the bass its its goosebump generating goodness without posing a hearing hazard.

At his age, I get in a movie once a month. But I prefer to spend quality time with him rather than movies. The bonding time is first priority. Wife is 2nd. HT/music is third. Actually many other tasks have higher priority than HT.


Back to FV25, it has alot of power waiting to be unleashed esp in the infrasonics where it shines the most. The FV15 is good, and the FV25 is just more than doubly better. 1.5x more port area per driver, lower native tuning. Its big and heavy, but I won't be upgrading subs for a long time. This sub sits amongst the top few in terms of output SPLs in the region that its the bane of all subs, the infrasonics.

 
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on June 03, 2018, 11:23
Congrats Jag! Same for me too. Hobby can always come later. Nowadays, I do more music with my toddler.


Sent from my iPhone using Tapatalk
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on June 03, 2018, 11:39
yah bonding is always no 1. must important time of all.
Family is No 1, there not much time for HT except weekend 1 or 2 movies.

only when our kids grow up, HT More together with them :)

Yah Bass invest once and no upgrade for next 5 years. somehow i felt 2019 is a good year for video upgrade.
Incoming 4k HDR projector upgrade , LASER. :)


Cant image the dual FV25HP heavy monsters how much space they occupy in your room... :)
Put on carpet or some platform for easy movement if needed? :) and somemore needed WAF lol. :)

Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on June 03, 2018, 22:54
But I prefer to spend quality time with him rather than movies. The bonding time is first priority. Wife is 2nd. HT/music is third. Actually many other tasks have higher priority than HT.

Hobby can always come later.

yah bonding is always no 1. must important time of all.
Family is No 1, there not much time for HT except weekend 1 or 2 movies.

Fully agreed. Children & family's something which nothing can buy back :)

HT can always enjoy later when children are older.


Expose baby to music. My 1yr old boy has been listening to music before he was born. So now, when I play those music, he actually sits still and listen intently. Else fidgets endlessly.

Nowadays, I do more music with my toddler.

Music as in like kids songs or adult? keke

I let my 10-month old son hear radio (rotate Eng, Mandarin channels and classical) and also youtube baby songs lol. Hopefully one day he will also enjoy hifi and good bass keke
Title: Re: Official Rythmik Subwoofer Thread
Post by: Spectre on June 03, 2018, 23:57
My son (1.5yrs) is obsessed with that Korean baby shark clip on YouTube... That's how my kk duo gets in its daily workout... For what it's worth, it has a decent midbass dub ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on June 04, 2018, 01:21
My boy enjoys pop music. He isn't so much into classical. Can tell easily. When music he like begins playing on my HT, he will hastily make his way into the HT room and start swinging/clapping his hands to the music in tandem to the rhythm.

Baby shark is one of his fav, but he also enjoys Hotel California, Kokomo, Adele, and other pop music. He even enjoys Flo'rida (awesome infrasonics) and Despacito, and the ATMOS version of Bailando.

When I switch to music he doesn't fancy, he looses interest in the music and he starts amusing himself with other antics.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on June 11, 2018, 15:22
Thank u,the waiting is killing me.
Your wait is over by tonight,
(https://uploads.tapatalk-cdn.com/20180611/434952bd4466d5b14eba7f2d5210ebc5.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on June 11, 2018, 16:46
Your wait is over by tonight,

Yes,good job for bring them in so fast,taking leave for the next 2 days to set them up. Will post my impression after that.

Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on June 12, 2018, 16:24
Just want to post some first impression on the F18s,these subs are no joke weight more then 50 kgs per sub,thanks for Peng help last night otherwise I alone wouldn't be able to put them in place. Running some music last night n the whole morning today,watching bass heavy movie clips for the past 2~3 hrs,even with the lfe level lower by 7~8db(no cal. just set each sub level around 75db bypass on Antimode dc)from correct level some of the clips already sound/feel deeper n louder then using the 4 smaller Rythmik subs. Final thought have to wait till they are fully run in.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on June 12, 2018, 18:20
take your time , at least another 40hts more.
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on June 12, 2018, 18:45
Going watch Fury ATMOs tomorrow. AWESOME bass....))

Sent from my SM-N9005 using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on June 12, 2018, 19:23
take your time , at least another 40hts more.

Noted will run in till Sunday b4 doing Antimode correction.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on June 13, 2018, 13:29
Just want to post some first impression on the F18s,these subs are no joke weight more then 50 kgs per sub,thanks for Peng help last night otherwise I alone wouldn't be able to put them in place. Running some music last night n the whole morning today,watching bass heavy movie clips for the past 2~3 hrs,even with the lfe level lower by 7~8db(no cal. just set each sub level around 75db bypass on Antimode dc)from correct level some of the clips already sound/feel deeper n louder then using the 4 smaller Rythmik subs. Final thought have to wait till they are fully run in.

congrats bro on your new toy! very nice indeed. Enjoy the nice deep bass
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on June 13, 2018, 18:27
Congrats bro for your new toys!  :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on June 13, 2018, 19:07
Congrats bro for your new toys!  :)
congrats bro on your new toy! very nice indeed. Enjoy the nice deep bass

Thanks,still need run in for 2~3 days but definitely is a step up from the E15hps.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on June 23, 2018, 20:38
Some update after nearly 2 weeks,first thing is about importance of run in the sub properly b4 calibration I calibrated the subs last Friday after some run in n again this morning after properly run in the subs non stop from Thursday night till this morning with some music dts-cd (with dts es 6.1) loop playback from the OPPO 205 bypass on antimode dc only the F18s are active. Both the calibration results were similar there's a V-shape dip start after 75hz end after 100hz,deeper is 85hz @-20db,from 16hz to 75hz fall between -0.5~-6db base on antimode corrected result. This didn't turn out for both to sound alike,after this morning calibration do about 2 hrs music listening bass sound more liquid like than b4 very smooth b4 is like when water flow through the narrow part of the river fast,rough n loud but some details was lost now is like it reached the wider part,water flow slowly but constantly n smoothly,more details can be heard n sound cleaner,the subs make all the speakers no matter main,surround or surround back sound bigger,fuller n more dynamic,listening to music as I writing this post very addictive,I listen to music with subs for the past 4yrs+ can't do without them u were be surprise that even stereo music also got lots of low bass, imagine some songs from China female singers can make the F18s cone move which u can see from your LP,I didn't boost my lfe level is @85db now. I crossover @70hz on OPPO 205 & 80hz on antimode with 2X 24db/octave lowpass filter I don't what the subs to play loud after 80hz as according to Brain@Rythmik servo is less effective @ higher fq plus since there's a dip after 75hz n all my speakers got no problem playing from 50hz up fq. Still haven't try ht as no free time this afternoon.
Second thing is about antimode,when doing calibration is best not to stay inside the room as this morning I encounter some strange results if I stand between the F18s, I changed the mic position few time also no change until I leave the room it back to normal.
Will post my final though both music playback n movie watching on the F18s in few weeks time as I limit my ht time from 12pm~4.30pm during weekend/holiday or when on leave n I'm more on music playback then movie watching. I play @-10~-5 mv so far no complain don't want to break it also.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on June 24, 2018, 14:24
wow must be very nice... enjoy your new  found sound  :) :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on July 07, 2018, 15:25
OMG
Check out the G25HPS :)

https://www.facebook.com/rythmikaudio/
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on July 07, 2018, 15:40
 :o :o :o and the enclosure is not very big

Interesting offering. I like

Good job Brian and rythmik
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on July 07, 2018, 15:41
Nice dual 15 sealed?. FV15HP size.  Gorgeous  )

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Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on July 07, 2018, 16:02
Hmmm G25HP mid bass + FV15HP dual combo ))

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Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 21, 2018, 09:40
So nearly 2 months had past,been very busy setting the right sub level/gain on the dual F18s to prevent them from shutting down during ULF heavy scenes like Lone Survivor:Chinook/Apache scene @19~21 mins mark,Sicario: tunnel gun firing @1hr:23min~,finally by setting the subs amp gain knob @3 o'clock(some thing I learn for avsforum:higer gain on sub amp can prevent clipping if there're high level of low bass content) n lower the Amtimode dc volume to -3db,there's no more shutting down play @-5~-10MV.Refer to this thread @avsforum to see how hot the ULF are: https://www.avsforum.com/forum/113-subwoofers-bass-transducers/2763785-ultimate-list-bass-movies-w-frequency-charts.html especially the Lone Survivor got very hot content @6.5hz,if the sub don't roll off after 10hz steep enough it could kill the sub if play @ high volume.After got the level right movie n music listening is a level up from my old subs,more details can be heard/feel also with lower crossover for speakers(60/70hz on OPPO 205) n higher crossover on Amtimode(2x 24db/octave LPF @100hz) the sound field are bigger/fuller more dynamic.
Now only 1 thing left to play: nearfield subwoofer placement, 1 more F18 directly behind my seat this have to wait till Peng new stock reached.
For music with subs,last month end I was @ GP Acoustic I meet a guy with KEF Ref.5 speaker who just added 2 15" Rythmik(I think is E15HP didn't ask)subs,both him & Kelvin told me when they added the first one immediately can heard the improvement the sub added to the system: speaker playing more clean n sound more dynamic,so a second one was send to him the next day.He told me 'Now I don't listen to music without subs'.
IMO subs do add more weight to music as there're lots of low end content in it which are in lower level the speaker already roll off @this level can't do much but subs help to bring out the content even @ the recorded level as it wouldn't roll off.I have 12",15" n now 18" in my setup for music,they sound alike as they're all sealed sub from Rythmik the different between them are the lower end reproducing,18" are more capable for that task so I heard more details,feel the ULF bass better when watching movie or listening to music on them,to me no matter 12",15" or 18" sub there's no such thing as bigger woofer sound slower thanks to the direct servo Rythmik sub offer.
1 last thing is subs will never sound like over power your other speakers if the level is set to your preference not reference,no matter how big or how many subs u have the level is always set to your own reference,going for larger sub will gain u more detail/feel n no lost of mid bass unless u're too addicted to mid bass.
Hope the above help someone who looking for upgrading to bigger sub.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on September 21, 2018, 13:02
Very nice bro! That is the right approach, use more amplifier gain on the subs and reducing the antimode volume to prevent digital clipping....

Definitely more details and headroom with the 18” in the house , great choice 👍🏻

Looking forward to listen to your set up next week
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 21, 2018, 15:09
Likewise looking forward to see u again,we can exchange some idea on ht & music listening setup for spks/subs n the 205.
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on September 22, 2018, 21:02
"... So nearly 2 months had past,been very busy setting the right sub level/gain on the dual F18s to prevent them from shutting down during ULF heavy scenes like Lone Survivor:Chinook/Apache scene @19~21 mins mark,Sicario: tunnel gun firing @1hr:23min~,finally by setting the subs amp gain knob @3 o'clock(some thing I learn for avsforum:higer gain on sub amp .... "

Hi bro,
Something is not right here... you are using dual 18"subwoofers and yet you are dialing them at 3 O'clock? your neighbor wont F*** you meh ?
Your subs are going to give up and creating "berr berr berr" noise soon.

What is the spec ? is it 1500 watt RMS ? and how big is your room ?
 ???
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on September 22, 2018, 23:26
Hi bro,
Something is not right here... you are using dual 18"subwoofers and yet you are dialing them at 3 O'clock? your neighbor wont F*** you meh ?
Your subs are going to give up and creating "berr berr berr" noise soon.

What is the spec ? is it 1500 watt RMS ? and how big is your room ?
 ???

Don't think there's anything wrong with setting it at 3 o'clock. It's useful to set the sub's gain higher to have higher 'reserves' from the sub's amp, & free up headroom from equipment chain (e.g. AVR). That's what some members do too. Myself included (learnt from other bros here) :)

But u will need some equipment in the chain (e.g. a DSP) to compensate the gain to balance the volume to ref/personal levels.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 22, 2018, 23:42
Is perfectly all right to have the gain set 3 or even to the Max , as this is the input stage.

just like your power amp mostly is at its Max ( RCA/XLR input with no vol/level/gain ) and the Vol is control by the pre ,so in the case of sub with the use of external EQ device this will act like a pre-amp's  Vol control and beco it also carry out the EQ so is good in this way to reserve the Max headroom in the EQ section to prevent clipping ,as a lot of time the EQ side clip so even at low output level the sub sounded bottom out /flat out and that is not beco of lack of power but the input signal was clipped ( run out of headroom )
Title: Re: Official Rythmik Subwoofer Thread
Post by: rayleh on September 23, 2018, 08:52
Sorry as I am kind of confused. Why did most people set the knob to mid point or almost mid point? Is it because there isn’t a AVR to control the gain?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 23, 2018, 10:08
Hi bro,
Something is not right here... you are using dual 18"subwoofers and yet you are dialing them at 3 O'clock? your neighbor wont F*** you meh ?
Your subs are going to give up and creating "berr berr berr" noise soon.

What is the spec ? is it 1500 watt RMS ? and how big is your room ?
 ???

Bro there's nothing wrong to set the gain knob @3 o'clock or even max I think Peng already reply,but I would like to said once more that gain knob position got nothing to do with clipping/how loud the sub play it just how it react to the input signal for the output device in this case the Antimode DC which take the sub channel signal from my OPPO 205 sub out(trim @ 0db),the one doing volume control is the 205 @100 it's @ref 0db that all.Just FYI I'm running 4 subs b4 getting the 18" dual 15"+dual 12",they all got different amp model in it: 12" class AB,15" Class H,the 18" Class HX which to my understanding is class D,I run the dual 15" gain knob @2 o'clock also located @ front corners,dual 12" directly behind my seat @12 o'clock gain knob to get the sub level I want,so with 2 18" gain knob @ 3 o'clock make perfect sense!!! If the level was too high I think I already fries them all. So please don't sound so harsh.
The amp power really got noting to do with the output(price also) 1 of the most importance factor for sub/speaker are sensitivity,the higher they are the louder they can play even with lower amp power. Below are the Rythmik F18,FV18 & FV25HP testing result @ data-bass.com :
https://data-bass.com/data?page=system&id=145
https://data-bass.com/data?page=system&id=146
https://data-bass.com/data?page=system&id=147
This last one is the Velodyne  DD18+ see it for yourself.
https://data-bass.com/data?page=system&id=64
For the complaint problem leave it to me as I handle it quite well for the past 5yrs+ only got 1 complaint from down stair which lead me to buy the Antimode to cut the 2 peaks on the FR,no more complaint after that.


Sorry as I am kind of confused. Why did most people set the knob to mid point or almost mid point? Is it because there isn’t a AVR to control the gain?

I don't use avr/avp, but it's a comment way to set the sub gain knob higher if the avr sub trim after room eq correction was near to '0' or even @ + side n re-cal after that rise the trim inside  the avr to what u want but best keep it below '0' to prevent clipping both the avr output n sub input.Once more refer to top reply from me + Peng/ronildoq/sevenz reply on gain knob on sub.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on September 23, 2018, 11:01
There is nothing wrong with setting the sub's gain knob at 3pm.

I have 2x FV25HP, and both of them are at 3pm. What is the key difference?

Advanced room calibration and measurements. I have been doing this for past 10yrs with very effective results. Advanced calibration
 and EQ techniques allow for optimal freq response  and house curves that will use all available wattage without being too loud.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on September 23, 2018, 11:15
Hi bro,
Something is not right here... you are using dual 18"subwoofers and yet you are dialing them at 3 O'clock? your neighbor wont F*** you meh ?
Your subs are going to give up and creating "berr berr berr" noise soon.

What is the spec ? is it 1500 watt RMS ? and how big is your room ?
 ???

It’s perfectly alright, and in fact highly recommended to maximise amplifier gain from the subs. Then reduce any volume in the digital domain. This way signal going into the subs is clean with headroom. Put it simply.

3 o’clock gain on subs , avr trim -9 =75db
12 o’clock gain, avr trim 0 = 75db

Assuming both are the same, 75db with an spl meter, go for 3oclock gain on the subs.

If u use a balanced connection with 4v rms, then you would gain +6db headroom in the digital domain. And chances are you will not need more than 10db headroom in the digital domain. The antimode offers a balance connection. So if I were NGSK , I would use a negative trim on the Oppo player, as that one has 2v rms on the rca  analog out to DC. Then I’ll play around with the gain settings on DC and subwoofer amp. So in his case, setting it at 3oclock on sub amp is about right

Hope that helps
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 23, 2018, 12:10
Bro,I'm on -3db @ Antimode leave the 205 @ '0' for easy reference.
The problem is some people don't know/understand that gain knob is not a volume control knob,max loudness a sub can play is fixed no matter where the knob position landed.
Just to make thing clear my F18s shut down only on ULF heavy scenes 10hz n below content with longer duration @ -5MV,it's no hard to understand that they will shut down @ this kind of condition,with the higher gain set + lower input volume from Antimode they don't shut down anymore. Believe me to fully enjoy movie watching u need to play @ -10~-5 MV this will make a so so movie watchable.


Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on September 23, 2018, 21:24
Bro,I'm on -3db @ Antimode leave the 205 @ '0' for easy reference.
The problem is some people don't know/understand that gain knob is not a volume control knob,max loudness a sub can play is fixed no matter where the knob position landed.
Just to make thing clear my F18s shut down only on ULF heavy scenes 10hz n below content with longer duration @ -5MV,it's no hard to understand that they will shut down @ this kind of condition,with the higher gain set + lower input volume from Antimode they don't shut down anymore. Believe me to fully enjoy movie watching u need to play @ -10~-5 MV this will make a so so movie watchable.

Hi bro,
I am so curious now about 3 O'clock gain knob set for dual 18" subwoofers. Is it because of direct servo technology which is adopted by Rythmik?
Surely siok and experience deep bass...
Won't mind, I can pay you a visit pls so I can compare with my smaller twin 12" JL e112 subwoofers but dial at 9.15 and learn from you more about the subwoofer?
(fyi, Audy will give me negative value 12 when I set at 9.30 gain knob.. truly too much bass when i dial at 10:00)
Perhaps you can also visit me then pls share your opinion on my subwoofer's setting. I hope I can improve it.
 :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 24, 2018, 01:03
Sorry as I am kind of confused. Why did most people set the knob to mid point or almost mid point? Is it because there isn’t a AVR to control the gain?
That is just a ref point to start off , after aduy do the auto thing the reading should be within 3db vs the center channel, so if too far off, say the center channel is 0db and the sub is -9db that means the level knob on the sub is set too high and should reduce.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 24, 2018, 07:23
Hi bro,
I am so curious now about 3 O'clock gain knob set for dual 18" subwoofers. Is it because of direct servo technology which is adopted by Rythmik?
Surely siok and experience deep bass...
Won't mind, I can pay you a visit pls so I can compare with my smaller twin 12" JL e112 subwoofers but dial at 9.15 and learn from you more about the subwoofer?
(fyi, Audy will give me negative value 12 when I set at 9.30 gain knob.. truly too much bass when i dial at 10:00)
Perhaps you can also visit me then pls share your opinion on my subwoofer's setting. I hope I can improve it.
 :)

After so many members posted indicated that gain knob got nothing to do with how loud a sub play u still what to talk about it, I'll stop here now no further comment on this topic.
From all the negative comment u post I don't think u're going to enjoy my demo so sorry bro,no thanks for the interest.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 24, 2018, 07:50
Now back to Rythmik sub,some quote from Brain on avsforum today:

Originally Posted by jjackkrash  View Post
I get tired of hearing that sub capability below 20Hz doesn't matter. All one has to do to prove this wrong is pop in the 25Hz filtered Blu Ray of Master and Commander and then compare it to non-filtered DVD. If you have subsonic capable subs the difference between the two tracks is obvious. Its good to see you reviewing with tracks below 20Hz.
I am curious what the design differences are between this sub and the SubMersive. Servo vs. big Speakerpower amp is one, I guess. But I suspect they are more similar than different, i.e., inert dual opposed 15s with a quality cab and quality drivers.

'The lower the frequency goes, the larger excursion the driver requires. But having a motor with larger excursion capability sacrifices efficiency when the magnet size is kept the same. Servo is able to get extra excursion within the same distortion limit, or lower distortion at the same excursion, without increasing magnet size. That is a plus for subsonic signals because the distortion created by subsonic signals from a sub can be more audible than the subsonic signals themselves.
The second difference between servo and non-servo subs is the transient response. Our servo subs are consistently more articulate because the intrinsic Q value of the drivers with servo feedback is 3x lower than non-servo. This is not the same as the time domain measurement from Josh. It is more of how a subwoofer recovers from presence of external disturbance and distortion. The subwoofer driver acts as if it has 3x the magnet size in the motor. If one asks a pro speaker driver designer the opinion of a sloppy bass subwoofer, the answer should include the motor size is too small (cutting cost) among all the possible reasons. Indeed, overly small motor size does make bass sound sloppy because of high driver Q value. Q value is related to motor size. The bigger the motor, the lower the driver Q value. Based on that same empirical experience, one can imagine the type of tight and articulate control that servo subwoofers can bring when the equivalent effect of servo is to increase the motor size by 3x.
Third, because it is servo feedback control, the FR is much more consistent from unit to unit than non-servo subs are. Servo is able to correct minor variability in driver parameters or enclosure size. This is much better than DSP correction because those corrections for the same model can be different from one batch to next, or one rev to next. For us, it is never a problem. That is the reason we can offer so many models. The data management issue is way simpler for us'

Originally Posted by Schrodinger23  View Post
Would the limiter help protect the driver from over-excursion on a ported Rythmik sub, if the damping is set to mid or high?

'The limiter will limit the amount of over-excursion, but not completely eliminate it. Most drivers can tolerate reasonable amount of over-excursion.'
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on September 24, 2018, 08:03
After so many members posted indicated that gain knob got nothing to do with how loud a sub play u still what to talk about it, I'll stop here now no further comment on this topic.
From all the negative comment u post I don't think u're going to enjoy my demo,so no thanks for the interest.

Hi bro,
Pls dont miss understanding me... what do you mean with '... from all negative comment I posted'?
I just want to find out (clarify with you) why your statement said 'gain knob got nothing to do with how loud a sub play u '
My finding is opposite your statement that's why I am sincerely want to understand and hear your 18' subwoofers with servo technology behavior.
The fact here is when I dial my 12" sub, the higher number, the loudness will be increased tremendously that's why I couldn't dial higher, Audy will give -12 when I set at 9.30...
Another possible factor is Antimode

That's all that I want to learn/find out from you by visiting you... no bad motive at all !
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 24, 2018, 08:06
How loud = max loudness a sub can play.Bro any further discussion pls pm. THANKS.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on September 24, 2018, 18:04
How loud = max loudness a sub can play.Bro any further discussion pls pm. THANKS.
Got pics of your room size with f18?

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Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on September 24, 2018, 18:10
Any  subs in room photo to wow us?)
Big thanks.
Got pics of your room size with f18?

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Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 24, 2018, 18:23
That is perfectly alright if a sub is connected directly to a Avr's sub out and Audy set the sub level to -9 or even lower , as this is in relation to all the other spk and their efficiency , the most importance is , are the level too far out compare to most of other spk ? expecially the center channel and if they are within the 3-6db range and sound good to you,well that is the level at that location that audy deemed right and suit your taste and if now you shift this sub to a corner and till inward 45 to point at the seat ,Audy may even further reduce it to say -11 as low freq are location sensitive and boundary gain will affect the spl and a given bandpass.

Afterall, whichever that knob called Vol/level/gain all it does is Alternate the income signal , if your sub seting is 9 or below that means the incoming signal is high to too high and this signal may clip much faster,run out of headrrom ,this o/p hv a dynamic swing of more then 2V and if at normol already at 1.5v a heavy bass note can easily add 3db to it so it clip ,sounded like limiter set in. anything further then here is the advance stage EQ and you need a external device.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on September 25, 2018, 08:04
Here are some pics of NGSK’s room, he has requested some help with posting pics

Front view
(https://uploads.tapatalk-cdn.com/20180925/867ea7b72c4957e3d2f054900604f22a.jpg)

Back view
(https://uploads.tapatalk-cdn.com/20180925/9f31f3f5320b102aa831dea5c6670790.jpg)

F18 front Left
(https://uploads.tapatalk-cdn.com/20180925/47bba79364e7afcdda37578a13892325.jpg)

F18 front Right
(https://uploads.tapatalk-cdn.com/20180925/cd04e8866dac6328ec2bf37d4321c84c.jpg)

The 18’ is the real deal when it comes to infrasonic deep bass



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Title: Re: Official Rythmik Subwoofer Thread
Post by: wechnivag on September 25, 2018, 10:23
I have had the pleasure of visiting Bro Ngsk previously. Real treat!

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Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 25, 2018, 10:46
I have had the pleasure of visiting Bro Ngsk previously. Real treat!

Sent from my X9009 using Tapatalk

U're welcome to have another demo with the OPPO 205 n F18s added this year plus some more foam on front wall & ceiling to cut down the HF. Sounds quite different from your last visit.

THANKS,Bro ronildoq for helping to post the pics.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on September 25, 2018, 11:55
Here are some pics of NGSK’s room, he has requested some help with posting pics

Front view
(https://uploads.tapatalk-cdn.com/20180925/867ea7b72c4957e3d2f054900604f22a.jpg)

Back view
(https://uploads.tapatalk-cdn.com/20180925/9f31f3f5320b102aa831dea5c6670790.jpg)

F18 front Left
(https://uploads.tapatalk-cdn.com/20180925/47bba79364e7afcdda37578a13892325.jpg)

F18 front Right
(https://uploads.tapatalk-cdn.com/20180925/cd04e8866dac6328ec2bf37d4321c84c.jpg)

The 18’ is the real deal when it comes to infrasonic deep bass



Sent from my iPhone using Tapatalk
Ur room is very narrow n small....to contain certain low bass wavelength.

Sent from my SM-N950F using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 25, 2018, 13:35
Hi bro,actually with smaller room size u got more room gain which take better effect only @ below 20' for the longest dimension of the room. Sealed sub normally roll off below 30hz @ 12db/octave n room gain in the other way round +12db/octave down low. There's a formula to calculate: (W^2+L^2+H^2)^0.5 for longest dimension of room.
(C/2)/L for start from which FQ. C=speed of sound which is 1130/sec
L=longest dimension
My room dim: 9.5'X14'X8.75' = 90.25+196+76.56^0.5 = 19.047' take note longest dimension is corner to corner that why is not 14'
(1130/2)/19.047'=29.66hz
So by 29.66hz my room gain start down to 14.83hz I might gain 12db which just offset the sub roll off,by 7.415hz I might gain another 12db and so on. The longer the dimension is the lower its start so often people said big room wouldn't benefit for room gain. Peak @12db/octave normally @8~10 db.
I'm not a fan of trapping all the bass energy inside the room,it going to be a nightmare to handle,letting some energy leaks out is better IMO. Some on avs/data-bass forum report that a small opening on a sealed room actually improve the ULF.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on September 25, 2018, 13:45
smaller room may not have gain below 20hz but may actually have peaks of harmonic say 40, 60, 80 etc..because of the close proximity of your side wall. I can foresee lots of bass overloading in your room with dual f18 and floorstander.  Maybe can organise a meetup to view and audition your setup?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 25, 2018, 13:48
Bro,I'll leave it as it is no more comment.
Title: Re: Official Rythmik Subwoofer Thread
Post by: wechnivag on September 25, 2018, 21:42
Hi bro,actually with smaller room size u got more room gain which take better effect only @ below 20' for the longest dimension of the room. Sealed sub normally roll off below 30hz @ 12db/octave n room gain in the other way round +12db/octave down low. There's a formula to calculate: (W^2+L^2+H^2)^0.5 for longest dimension of room.
(C/2)/L for start from which FQ. C=speed of sound which is 1130/sec
L=longest dimension
My room dim: 9.5'X14'X8.75' = 90.25+196+76.56^0.5 = 19.047' take note longest dimension is corner to corner that why is not 14'
(1130/2)/19.047'=29.66hz
So by 29.66hz my room gain start down to 14.83hz I might gain 12db which just offset the sub roll off,by 7.415hz I might gain another 12db and so on. The longer the dimension is the lower its start so often people said big room wouldn't benefit for room gain. Peak @12db/octave normally @8~10 db.
I'm not a fan of trapping all the bass energy inside the room,it going to be a nightmare to handle,letting some energy leaks out is better IMO. Some on avs/data-bass forum report that a small opening on a sealed room actually improve the ULF.
That is actually true! My sealed subs have room gain to 10hz. Once I forgot to close window before running a measurement sweep, was shocked that the response was flat to 5hz before rolloff!!

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Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on September 25, 2018, 22:23
Actually there is no such thing as bass overloading. There is however such thing as insufficient bass, bass is never enough for me, honestly. I think the benefits with NGSK’s room being small is that it is easier to pressurise, unlike my place where I have it in the hall, it’s very very challenging to pressurise the whole hall, tons of volume to fill up.

Another benefit is he has got an outboard EQ device, that will eliminate all the peaks and resonance in the room, and concurrently improve bass decay times. Plus I can also see some traps at trihedral corners, that will help again. When the system benefits from room gain, u need not drive the subs hard to achieve the desired SPLs, this provides additional headroom, leaving your subs in cruising mode, once in cruising mode, harmonic distortion Low,it will perform well,  that is the key. It needs to be in cruising mode. That is why I have 4 subs at home, all 4 18” in cruising mode

I can understand and see why he appreciates the 18” sealed version, it’s something I grew very fond of as well. The 18” brings a different kind of feel to the setup and this type of infrasonic deep bass is never annoying to neighbours, but very pleasing and syok to the listeners, you never get fatigue and ringing from excessive bass.

That deep extension down to the single digit 5hz, priceless , not many rooms can replicate
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on September 26, 2018, 00:13
Here are some pics of NGSK’s room, he has requested some help with posting pics

Front view
(https://uploads.tapatalk-cdn.com/20180925/867ea7b72c4957e3d2f054900604f22a.jpg)

Back view
(https://uploads.tapatalk-cdn.com/20180925/9f31f3f5320b102aa831dea5c6670790.jpg)

F18 front Left
(https://uploads.tapatalk-cdn.com/20180925/47bba79364e7afcdda37578a13892325.jpg)

F18 front Right
(https://uploads.tapatalk-cdn.com/20180925/cd04e8866dac6328ec2bf37d4321c84c.jpg)

The 18’ is the real deal when it comes to infrasonic deep bass



Sent from my iPhone using Tapatalk

Wow very chio front speakers. What speaker is that?

Is it coaxial design
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 26, 2018, 07:30
Wow very chio front speakers. What speaker is that?

Is it coaxial design

Bro is KEF ref 203/2 the previous reference speaker b4 the ref 3.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 26, 2018, 08:24
That is actually true! My sealed subs have room gain to 10hz. Once I forgot to close window before running a measurement sweep, was shocked that the response was flat to 5hz before rolloff!!

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So some one in Singapore also feel it!!! That good.

Actually there is no such thing as bass overloading. There is however such thing as insufficient bass, bass is never enough for me, honestly. I think the benefits with NGSK’s room being small is that it is easier to pressurise, unlike my place where I have it in the hall, it’s very very challenging to pressurise the whole hall, tons of volume to fill up.

Another benefit is he has got an outboard EQ device, that will eliminate all the peaks and resonance in the room, and concurrently improve bass decay times. Plus I can also see some traps at trihedral corners, that will help again. When the system benefits from room gain, u need not drive the subs hard to achieve the desired SPLs, this provides additional headroom, leaving your subs in cruising mode, once in cruising mode, harmonic distortion Low,it will perform well,  that is the key. It needs to be in cruising mode. That is why I have 4 subs at home, all 4 18” in cruising mode

I can understand and see why he appreciates the 18” sealed version, it’s something I grew very fond of as well. The 18” brings a different kind of feel to the setup and this type of infrasonic deep bass is never annoying to neighbours, but very pleasing and syok to the listeners, you never get fatigue and ringing from excessive bass.

That deep extension down to the single digit 5hz, priceless , not many rooms can replicate

Bro,even with dual F18s I have to face the true fact that I'm not feeling anything when playing the BHD:'F***ing Irence scene' n Lone Survivor:'Chinook/Apache scene' @19~23 mins(both got 6~6.5hz content). It make perfect sense as I've to play 10~30 db higher then ref(115db+redirect bass from other channels=120db+10~30db) according to what I read to get that feel which is impossible for me,that is why I plan to place another 18' behind my seat for nearfield sub to get that feel but have to load one from Peng to test it first. B4 that I build a 3'X2'X2" riser for my seat to improve the tactical respond n it turn out to be quite good on my limited time during last weekend.
18" subs will started to roll off same as the smaller one the different is they got more output eg. the F18 got 2.5db more output @20hz compare to the E15hp so they can extent lower with use-able output,this make a different when watching movie or listening to music with low bass content even recorded @ low level,I re-watch Avengers,Avatar which are not low bass heavy movies 1~2 weeks back,the sound/feeling are different from the previous subs,more weight on the bass department,so deeper extension on bigger sub still got its credit,with multi 18" subs the benefit is even greater.
Mid bass is the one that well cause uncomfort to neighbors,which is why I don't get complaint after using the Antimode DC to cut 2 peaks @40~hz & 60~hz,another key point is I only play movies @ 12~5pm on weekend/holidays,100% no movie @ morning/night time only music listening,play with consideration don't disturb others resting time n u'll be fine.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on September 26, 2018, 08:51
Yes I thought so it could never be enough. Have u experienced goose bump effect at your place. I’ll bring one scene, “ real steel” arena fight scene.... that one has got tons of deep bass, lotsa goosebumps, hair will start to stand each time bass hits

Or maybe I’ll nust upload here when I get home

Nice approach there again on having the riser to improve tactile response and acoustics

What settings did u settle down with on the dual f18? Or still experimenting ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 26, 2018, 09:55
Yes it's done setting on F18s plate amp: 12hz ext/hi-damping/ramble filter:off,set it to on cut down lots of under 20hz content as u can see on the data-bass test result + my own experience show that too on the WWZ grenade scene bass sweep started @ 80hz all the way down to 10hz,the strongest output is @ 20+hz~10hz which is softer comparing on/off, gain knob @ 3 o'clock,Antimode DC: vol @ 0db,2X 24db LPF @100hz,no house curve needed anymore to get the level/feel I want for movie,@ lift 3 tilt 3 for music to lift a little more on the lower end.
U're welcome to bring deep bass demo clips this Saturday n I will demo some special movie/music clips to u.
'No replacement for displacement' is want I think the best advise when consider upgrading subwoofer,one can never get enough displacement for ULF content on sub base on the 10~30db more from ref level to actually feel it,it's no crazy to see 1 avsforum member with 24X18" sub in his room which than can feel these 2 scenes,another 1 with dual PSA T18(triple 18" woofer in 1 sub)+dual PSA S3601(2 18" woofer in 1 sub) also reported he feel nothing!!!
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on September 26, 2018, 10:10
Yes it's done setting on F18s plate amp: 12hz ext/hi-damping/ramble filter:off,set it to on cut down lots of under 20hz content as u can see on the data-bass test result + my own experience show that too on the WWZ grenade scene bass sweep started @ 80hz all the way down to 10hz,the strongest output is @ 20+hz~10hz which is softer comparing on/off, gain knob @ 3 o'clock,Antimode DC: vol @ 0db,2X 24db LPF @100hz,no house curve needed anymore to get the level/feel I want for movie,@ lift 3 tilt 3 for music to lift a little more on the lower end.
U're welcome to bring deep bass demo clips this Saturday n I will demo some special movie/music clips to u.
'No replacement for displacement' is want I think the best advise when consider upgrading subwoofer,one can never get enough displacement for ULF content on sub base on the 10~30db more from ref level to actually feel it,it's no crazy to see 1 avsforum member with 24X18" sub in his room which than can feel these 2 scenes,another 1 with dual PSA T18(triple 18" woofer in 1 sub)+dual PSA S3601(2 18" woofer in 1 sub) also reported he feel nothing!!!
U able to post your  REW graph with no smoothing....

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Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on September 26, 2018, 10:31
Rock123 n myself can drop by to audition sat? Sharing session.

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Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on September 26, 2018, 10:36

Here are some pics of NGSK’s room, he has requested some help with posting pics

F18 front Right
(https://uploads.tapatalk-cdn.com/20180925/cd04e8866dac6328ec2bf37d4321c84c.jpg)


Wow.. awesome floor stander speaker with dual sound ports.

If your main left and right speakers are of a ported design, should we use the port plugs in order to eliminate the out of phase waveform that the port introduces to the phase relationship between the speaker’s woofer and the subwoofer?

The bump in the bass created by the port may be desirable with a pair of speakers playing full range but when adding a powered subwoofer the bump is unnecessary and impedes smooth bass transition between the speaker and the subwoofer.

Pls share your opinion pls
 :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on September 26, 2018, 10:42
Rock123 n myself can drop by to audition sat? Sharing session...
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Can I join in as well for sharing/discussion? I will come with one buddy who has experience in AM dual core.
Title: Re: Official Rythmik Subwoofer Thread
Post by: kennyluck2000 on September 26, 2018, 11:45
Interesting debate....
Sometimes what we see now can be different from what you hear...
Theoretically what shouldn't be done but with some experience anything can be done.... just a matter of time to get it right.... 8)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on September 26, 2018, 16:19
Interesting debate....
Sometimes what we see now can be different from what you hear...
Theoretically what shouldn't be done but with some experience anything can be done.... just a matter of time to get it right.... 8)
And that is why we need to visit to see n hear how its done...

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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on September 26, 2018, 19:13
Bro is KEF ref 203/2 the previous reference speaker b4 the ref 3.

Ah I see. I like! Hehe. What centre u using? Can't really see from pic. Or is it phantom centre?
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on September 26, 2018, 19:20
Any possible to audit the first dual F18s!))
 Big tks!

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Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on September 27, 2018, 07:17
Ah I see. I like! Hehe. What centre u using? Can't really see from pic. Or is it phantom centre?

U're right phantom center,GP do have a matching center when I bought them but as u can see I only have 1 seat + distance between them is 5.5',phantom center sound good enough for me. They look even better in real life,high gloss cherry. Thanks.
Title: Re: Official Rythmik Subwoofer Thread
Post by: htthach on September 27, 2018, 12:43
What's the current price for F15HP?
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on September 27, 2018, 19:58
So nearly 2 months had past,been very busy setting the right sub level/gain on the dual F18s to prevent them from shutting down during ULF heavy scenes like Lone Survivor:Chinook/Apache scene @19~21 mins mark,Sicario: tunnel gun firing @1hr:23min~,finally by setting the subs amp gain knob @3 o'clock


In order to safeguard your power amp from continuously heating up so do you think use Y-adapter would be a good idea?
It will add 6db gain then you can tune down your dial knob.

 ???
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on September 27, 2018, 21:00
Enjoy the F18s !)

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Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 02, 2018, 09:14
Last Saturday I enjoyed my session At NGSK room, the f18s rythmik were very fast and clean , much to my liking as well. Deep bass was fast and accurate, pounding with speed and very nice rumbling. Tons of SPLs down 30hz level.This helped with a very nice Sounding KEF speakers, beautiful sounding KEF. Was in my shortlist initially before I went for the ribbon monitor audios.

But something was amiss, I found that somewhere some details were missing. So I took my gear out and we did some measurements.

We did some tweaking later, moved the subs and re tweaked and optimised the system using just the Oppo 205

I’ll share more details on our tweaking journey Soon....

Here is the initial response when I first visited. Lower midbass having a dip 40-62 and both subs having the same response at the front wall....it was affecting the Low bass...

(https://uploads.tapatalk-cdn.com/20181002/0e13c2dd282ed89359b3427df4696c53.jpg)


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Title: Re: Official Rythmik Subwoofer Thread
Post by: sypderman88 on October 02, 2018, 14:18
 nasty dip there..how abt the spectogram?
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 02, 2018, 20:08
May i know how much 1 set of F18 ?)thks

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Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 03, 2018, 08:22
nasty dip there..how abt the spectogram?

No issues with bass ringing, well controlled with antimode DC EQ, very nice, lotsa headroom and the f18s were cruising .... clean and nice , servo is very fast

Hang on, I’ll post soon, how we integrate the system again, after moving the subs to another location and maximise the f18s....
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 03, 2018, 08:33
The bass extension down to 8hz, priceless , nice pressure at MLP, within the bubble. very clean sounding , excellent for music as well, so much details with the 5.1 dts music track... antimode eliminated most of the peaks, we tidied up further with 3 Peaks cutting PEQ (no boosting) , headroom measurements, aligning mains with subs crossover, phase matching with distance tweak on Oppo,compression test, harmonic distortion, level matching... by then it was almost 9.30pm... but I think we did a great job improving the system overall

These were all done up to 110hz, no EQ applied above 110hz with mains, just as it is
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on October 03, 2018, 10:18
The bass extension down to 8hz, priceless , nice pressure at MLP, within the bubble. very clean sounding , excellent for music as well, so much details with the 5.1 dts music track... antimode eliminated most of the peaks, we tidied up further with 3 Peaks cutting PEQ (no boosting) , headroom measurements, aligning mains with subs crossover, phase matching with distance tweak on Oppo,compression test, harmonic distortion, level matching... by then it was almost 9.30pm... but I think we did a great job improving the system overall

These were all done up to 110hz, no EQ applied above 110hz with mains, just as it is

Usually, I measure mine from 10hz to 200hz (some other forums suggested too) but I noticed you measured up to 110hz only...
I believe you have the reason behind why so won't mind sharing.... pls

(https://uploads.tapatalk-cdn.com/20180925/9f31f3f5320b102aa831dea5c6670790.jpg)

What surprised me is treated room so well and also no interaction with C and yet still have nasty deeps.
Well, I am looking forward to seeing the REW result how you can solve peak and double deep dips.
 ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 03, 2018, 13:35
Sweeps are still taken from 5-200hz, but the focus on solving the bass response from subs alone is up to 100hz, beyond 100-200hz, I look at mains + subs. I insert a Low pass filter at 110hz, because I don’t want the subs handling >100hz, I want the speakers handling bass beyond 100hz, there is a reason to this approach...

The treatment is mainly to solve the first reflection points, which are from the mains and other speakers, for subs, u need huge traps or PSI, not so easy. Those foam type are broadband absorbers and won’t do much below 100hz
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on October 03, 2018, 17:07
Nasty deep can never be eliminated like i said due to the so narrow close proximity of the 2 side wall...

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Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 03, 2018, 17:09
Nasty deep can never be eliminated like i said due to the so narrow close proximity of the 2 side wall...

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The dual F18s sure sound fast and awesome.
Just an input that the space can be improved by providing more room behind and side @placement of the subs

Cheers. :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on October 03, 2018, 17:10
Show your rew 1/24 or 1/12 smoothing...

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Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on October 03, 2018, 17:12
The dual F18s sure sound fast and awesome.
Just an input that the space can be improved by providing more room behind and side @placement of the subs

Cheers. :)
Rock123, how can space be improved if room is already small loll

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Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 03, 2018, 17:13
Rock123, how can space be improved if room is already small loll

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can be done. just need to shift and adjust :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on October 03, 2018, 17:23
can be done. just need to shift and adjust :)
U pull out sub it obstruct front speaker, u put behind it obstruct rear speaker....and introduce another set of double dips

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Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 03, 2018, 17:33
U pull out sub it obstruct front speaker, u put behind it obstruct rear speaker....and introduce another set of double dips

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Perhaps using satellites with dual 12inchers ? :) our HDB is very small not like US homes mah. :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on October 03, 2018, 17:36
Perhaps using satellites with dual 12inchers ? :) our HDB is very small not like US homes mah. :)
US home their small room is actually like hdb living room.

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Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on October 03, 2018, 18:52
Sweeps are still taken from 5-200hz, but the focus on solving the bass response from subs alone is up to 100hz, beyond 100-200hz, I look at mains + subs. I insert a Low pass filter at 110hz, because I don’t want the subs handling >100hz, I want the speakers handling bass beyond 100hz, there is a reason to this approach...

The treatment is mainly to solve the first reflection points, which are from the mains and other speakers, for subs, u need huge traps or PSI, not so easy. Those foam type are broadband absorbers and won’t do much below 100hz

I would prefer to use the natural absorber such as fabric sofa, rug, bookshelf, bluray rack and painting in order to reduce the energy of sound wave before reflection happened.
Will leather sofa still reflect the sound?  ???

I saw this watermelon...

(http://i1149.photobucket.com/albums/o581/A-hok/c61a815f-b4fb-4924-88b0-012e4441a8bf_zpsid97pdpi.jpg)

It looks cute rather than boring black acoustic foam, thick bass trap and expensive active bass trap PSI but not sure whether it will work as an absorber... (hmmm)
Surely, wife will approve it... fruity fruity fruity room....hehehehe
 ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: kennyluck2000 on October 03, 2018, 19:49
Sweeps are still taken from 5-200hz, but the focus on solving the bass response from subs alone is up to 100hz, beyond 100-200hz, I look at mains + subs. I insert a Low pass filter at 110hz, because I don’t want the subs handling >100hz, I want the speakers handling bass beyond 100hz, there is a reason to this approach...

The treatment is mainly to solve the first reflection points, which are from the mains and other speakers, for subs, u need huge traps or PSI, not so easy. Those foam type are broadband absorbers and won’t do much below 100hz

I thinks after some tweak from you... ngsk should do an open house....
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 03, 2018, 20:11
Yah waiting for invition. A FV15HP owner here. Hope i am honoured to audit the f18s thanks a lot.)
I thinks after some tweak from you... ngsk should do an open house....

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Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 05, 2018, 20:37
Last Saturday I enjoyed my session At NGSK room, the f18s rythmik were very fast and clean , much to my liking as well. Deep bass was fast and accurate, pounding with speed and very nice rumbling. Tons of SPLs down 30hz level.This helped with a very nice Sounding KEF speakers, beautiful sounding KEF. Was in my shortlist initially before I went for the ribbon monitor audios.

But something was amiss, I found that somewhere some details were missing. So I took my gear out and we did some measurements.

We did some tweaking later, moved the subs and re tweaked and optimised the system using just the Oppo 205

I’ll share more details on our tweaking journey Soon....

Here is the initial response when I first visited. Lower midbass having a dip 40-62 and both subs having the same response at the front wall....it was affecting the Low bass...

(https://uploads.tapatalk-cdn.com/20181002/0e13c2dd282ed89359b3427df4696c53.jpg)


Sent from my iPhone using Tapatalk

Alright, lets see now what happened after we moved the subs.... Here you go...

(https://drive.google.com/uc?export=download&id=15TjIjPEAjZT9T0RKPl1oIoqWOemRvy6P)

Now you can see one of the front subs covering the hole, moving it to the back wall

(https://drive.google.com/uc?export=download&id=1QkjqdU9hbhShW7DjisaZSsfq_LoPf07Q)

here is the final curve, nice... No house curve EQ applied, natural curve here, exactly where we want it to be, compare this to the earlier response, much much better, one small dip around 60-62hz... but we brought the entire system up by filling the lower midbass area, that very much affected the low bass....
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on October 05, 2018, 20:44
Alright, lets see now what happened after we moved the subs.... Here you go...

(https://drive.google.com/uc?export=download&id=15TjIjPEAjZT9T0RKPl1oIoqWOemRvy6P)

Now you can see one of the front subs covering the hole, moving it to the back wall

(https://drive.google.com/uc?export=download&id=1QkjqdU9hbhShW7DjisaZSsfq_LoPf07Q)

here is the final curve, nice... No house curve EQ applied, natural curve here, exactly where we want it to be, compare this to the earlier response, much much better, one small dip around 60-62hz... but we brought the entire system up by filling the lower midbass area, that very much affected the low bass....
60hz and 80 to 100hz is almost 20db down compared to 20hz. U able to bring it level?

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Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 05, 2018, 20:50
Next we proceed to measure the centre, Phantom Centre, measuring both Left and Right simultaneously...

(https://drive.google.com/uc?export=download&id=1ZFYYyGuXhdGL4GWUDouq9mBr1NuvCUzx)

You can see the mains rolling off after 35hz. and you can still see the room mode 40-60hz... but that is now taken care by the subs, because we will approach to cross the mains at 70hz, an octave above roll off point, this is recommended since the lower limit is 35hz

Next we crossed at 70hz

(https://drive.google.com/uc?export=download&id=1v0Z9OQaocBx-S9DWfy04e14f_KYXWADt)

nasty cancellation between mains and sub at 70hz blue line... Now comes the magic, with distance tweak, both subs + mains summing up.A 4.5m distance on the subs, in green line, and all in phase. ;)

Crossed at 80hz, also summing up now mains+subs

(https://drive.google.com/uc?export=download&id=1JH8jHuaZjQ2MQnnFov0EvFtJb1P-nT2x)


Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 05, 2018, 20:54
Finally we did the compression test, tons of headroom on the F18. No issues playing at reference levels

(https://drive.google.com/uc?export=download&id=18xkXsSqUKaIvygyIU7lB2HrKBsWLIK08)

At -6 below reference, THD at 12hz is 4%, very clean sounding, Servo Subs power

Beautiful sounding F18, love it!!
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 05, 2018, 21:00
60hz and 80 to 100hz is almost 20db down compared to 20hz. U able to bring it level?

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Dont need to, that is LFE channel, special effects channel, with this channel, we want upward slope as we approach down lower frequencies, this will give u an effect when energy sweeps at 20hz, u will feel a gush of energy go pass u. As for the midbass level beyond 70hz, mostly taken care by the mains, with speed and attack from the speakers woofers... The depth from the F18 will cover this speed on the LFE channel up to 100hz, gentle softer depth with lower levels....

this will create a sound that is equal across all frequencies, from 5 to 100hz....
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on October 05, 2018, 21:04
Dont need to, that is LFE channel, special effects channel, with this channel, we want upward slope as we approach down lower frequencies, this will give u an effect when energy sweeps at 20hz, u will feel a gush of energy go pass u. As for the midbass level beyond 70hz, mostly taken care by the mains, with speed and attack from the speakers woofers... The depth from the F18 will cover this speed on the LFE channel up to 100hz, gentle softer depth with lower levels....

this will create a sound that is equal across all frequencies, from 5 to 100hz....
LFE has content from 0 to 120hz....it can not b channel back to main left right unless theres no sub and main is set as full.

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Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 05, 2018, 21:11
LFE has content from 0 to 120hz....it can not b channel back to main left right unless theres no sub and main is set as full.

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there is no intention to channel LFE signal to mains, this curve itself is a natural house curve in the LFE channel. Most of the effects happen from 15 to 70hz, We prefer a natural rising curve like this, way way nicer, compared to a flat target curve....
Title: Re: Official Rythmik Subwoofer Thread
Post by: ckt on October 05, 2018, 21:22
there is no intention to channel LFE signal to mains, this curve itself is a natural house curve in the LFE channel. Most of the effects happen from 15 to 70hz, We prefer a natural rising curve like this, way way nicer, compared to a flat target curve....
But u are missing lots of impact from 70 to 120hz that is recorded in lots of movie LFE...

Sent from my SM-N950F using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 05, 2018, 21:29
Not really, actually if u see the curve, u will notice the coverage from 75hz to 8hz, is a slow rising 10db gain, there is no loss in detail here. As u go from 70-120hz, it gets louder, so the effect of a 10db reduction as it approaches 75hz is perfectly natural, and in fact preferred by many. Read up a bit on house curve, and u will understand what I mean
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 05, 2018, 22:04
Wow. thanks for taking the extra mile to even post the graphs after helping fellow bros with selfless calibration

super good n detailed!

Ronil, the house curve, correct me if I'm wrong. U using 8hz and 75hz to calibrate the equal ear loudness?

By the way, I can't recall the theory. Will smaller rooms require steeper or less steep rising slope compared to bigger rooms to have same ear loudness between mid bass and low bass ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 05, 2018, 22:07
Yea , the smaller the room, the steeper the curve, the bigger the room, the less. Normally I think 16db rise  from 80-20hz for room size 4x3m sounds about right, and 8db double that room size....
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 05, 2018, 22:11
Wow. thanks for taking the extra mile to even post the graphs after helping fellow bros with selfless calibration

super good n detailed!

Ronil, the house curve, correct me if I'm wrong. U using 8hz and 75hz to calibrate the equal ear loudness?

By the way, I can't recall the theory. Will smaller rooms require steeper or less steep rising slope compared to bigger rooms to have same ear loudness between mid bass and low bass ?

NGSK room is very nice, u should visit him if u get a chance, he has a nice riser built on the MLP, perfect for tactile transmission and acoustics, not bad. KEF speakers were beautiful. Quite enjoyable, I enjoyed our session, nice guy too
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 05, 2018, 22:11
Yea , the smaller the room, the steeper the curve, the bigger the room, the less.

Thanks for the recap. Means i vaguely remember correctly keke
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 05, 2018, 22:13
NGSK room is very nice, u should visit him if u get a chance, he has a nice riser built on the MLP, perfect for tactile transmission and acoustics, not bad. KEF speakers were beautiful. Quite enjoyable, I enjoyed our session, nice guy too

Ooooh. Riser. Means sofa n NF sub  mounted on the riser?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 05, 2018, 22:17
Ooooh. Riser. Means sofa n NF sub  mounted on the riser?

Sofa on the wooden riser, elevated. Height, so the Low bass energy transmits to the riser, and in turn transmit to the sofa seat, it also traps excessive Low bass energy, so quite good. Not bad the fv18, very clean sounding.

You know that lycan scene? The machine gun bullets firing with accuracy and speed at 30hz..... very nice on f18
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 05, 2018, 23:07
Sofa on the wooden riser, elevated.

Ooooo. Creative, interesting. Seems like work like a tactile tranducer.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 06, 2018, 09:13
NGSK room is very nice, u should visit him if u get a chance, he has a nice riser built on the MLP, perfect for tactile transmission and acoustics, not bad. KEF speakers were beautiful. Quite enjoyable, I enjoyed our session, nice guy too

Bro,thanks for the kind words,same same I enjoyed our session too,anytime another session when u got time,this round was more on tweaking less listening next 1 we do more on listening n do some fine tune after that.
Title: Re: Official Rythmik Subwoofer Thread
Post by: whyeme on October 06, 2018, 09:24
You know that lycan scene? The machine gun bullets firing with accuracy and speed at 30hz..... very nice on f18

Which film bro? This one?  :)

http://www.youtube.com/v/c2WM-QITuDw&fs=1
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 06, 2018, 09:29
Bro,thanks for the kind words,same same I enjoyed our session too,anytime another session when u got time,this round was more on tweaking less listening next 1 we do more on listening n do some fine tune after that.

We have already calibrated the system to reference, eliminating as much peaks and filling up dips with placement and EQ, getting as smooth a response possible.Phase matching with mains. NOw just need to tweak to preference, the house curve is the final balance, how steep  the curve should be in that room, u gotta listen few rounds, tweak again for the right balance. Play around with tilt n lift on antimode
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on October 06, 2018, 09:51
We have already calibrated the system to reference, eliminating as much peaks and filling up dips with placement and EQ, getting as smooth a response possible.Phase matching with mains. NOw just need to tweak to preference, the house curve is the final balance, how steep  the curve should be in that room, u gotta listen few rounds, tweak again for the right balance. Play around with tilt n lift on antimode

You are the best EQ guy in town ... LOL 
;D

What is the level match being used? is it still 3pm ?
BTW, do you have his room curve for L/R+C+two subs?
 ???
Title: Re: Official Rythmik Subwoofer Thread
Post by: kennyluck2000 on October 06, 2018, 10:08
We have already calibrated the system to reference, eliminating as much peaks and filling up dips with placement and EQ, getting as smooth a response possible.Phase matching with mains. NOw just need to tweak to preference, the house curve is the final balance, how steep  the curve should be in that room, u gotta listen few rounds, tweak again for the right balance. Play around with tilt n lift on antimode

Well done ronildog...
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 06, 2018, 10:42
You are the best EQ guy in town ... LOL 
;D

What is the level match being used? is it still 3pm ?
BTW, do you have his room curve for L/R+C+two subs?
 ???

Lol, no la bro, just like to help. Still 3pm, no issues there as mentioned before. We tweak by maximising headroom In the digital domain, having a negative trim setting on the Oppo 205, and antimode, then pusshiing the bulk of the gain to the subwoofer amplifier

Also mentioned before, there is no centre. It’s a phantom centre channel. Only LR. So the measurements are L+R speakers + subs, these should all sum up when in phase

You will know the quality of the subs when u hear one, this f18 has all the quality
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on October 06, 2018, 10:51
Lol, no la bro, just like to help. Still 3pm, no issues there as mentioned before. We tweak by maximising headroom In the digital domain, having a negative trim setting on the Oppo 205, and antimode, then pusshiing the bulk of the gain to the subwoofer amplifier

Also mentioned before, there is no centre. It’s a phantom centre channel. Only LR. So the measurements are L+R speakers + subs, these should all sum up when in phase

You will know the quality of the subs when u hear one, this f18 has all the quality

Yeah... I m sincerely want to hear especially without Center speaker but no invitation.
(I never heard HT setup without Center before, but I ever heard use dual Center).

 :(
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 06, 2018, 18:08
Which film bro? This one?  :)

http://www.youtube.com/v/c2WM-QITuDw&fs=1

https://drive.google.com/file/d/1goKV-89wXGAUz-gnBjH-3Pnhj66DqZP2/view

Download this clip, then be careful, reduce the volume before playing this clip. Its got content down to 1hz. very deep bass, can fry your subs.

Watch timestamp 29 sec in this clip, she will fire the machine gun at the lycan, with speed....... There is a very fast start stop effect from the machine guns, clean rumbling.....
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on October 06, 2018, 19:10
I prefer big fish..."In the heart of the sea" and killer robot "Terminator Genisys" ... plenty of bass there.

 ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: whyeme on October 06, 2018, 20:27
https://drive.google.com/file/d/1goKV-89wXGAUz-gnBjH-3Pnhj66DqZP2/view

Download this clip, then be careful, reduce the volume before playing this clip. Its got content down to 1hz. very deep bass, can fry your subs.

Watch timestamp 29 sec in this clip, she will fire the machine gun at the lycan, with speed....... There is a very fast start stop effect from the machine guns, clean rumbling.....

wow thanks bro! greatly appreciated! :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on October 07, 2018, 16:34
 Ronil
We have already calibrated the system to reference, eliminating as much peaks and filling up dips with placement and EQ, getting as smooth a response possible.Phase matching with mains. NOw just need to tweak to preference, the house curve is the final balance, how steep  the curve should be in that room, u gotta listen few rounds, tweak again for the right balance. Play around with tilt n lift on antimode

Well said.

1) Placement works to fill the dips. Dual subs also help to fill dips.

2) Delay helps to ensure both subs are working in correct phase. 

3) PEQ helps to cut peaks and smooth FR.

4) Lastly, addition EQ to set the house curve to suit the bass to the owner's ears. This step has no right or wrong as it is totally up to the owner's discretion what he wants his home theater system to sound like as a whole.

Generally, the first 3 steps (in sequence) is very standard SOP. The last step is determined by what kind of bass the owner wants and how much the equipment can deliver before distortion or damage sets in. 

Some like chest punching mid-bass, some like infrasonic <20hz  bass, some like zero house curve... no wrong or right. This is the time for the owner to figure out what he likes and to set the house curve to suit his ears.

Tip : My findings were that Infrasonic bass is less likely to attract neighbourly complaints compared to mid-bass.
Title: Re: Official Rythmik Subwoofer Thread
Post by: CASH on October 07, 2018, 22:35
bro ronil, I wonder if passive subwoofers will be a new challenge to calibrate?
if u can, I would love to invite u over my place to calibrate 4 of my pioneer passive "Car" subwoofers.
how buddy?
is it possible to calibrate passive subs?
Title: Re: Official Rythmik Subwoofer Thread
Post by: mutant on October 07, 2018, 23:09
https://drive.google.com/file/d/1goKV-89wXGAUz-gnBjH-3Pnhj66DqZP2/view

Download this clip, then be careful, reduce the volume before playing this clip. Its got content down to 1hz. very deep bass, can fry your subs.

Watch timestamp 29 sec in this clip, she will fire the machine gun at the lycan, with speed....... There is a very fast start stop effect from the machine guns, clean rumbling.....
I like this scene, but the machine gun  at that 29 sec sounds quite flat like no bass for mine. While the atmosphere rumbling sound is there.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 08, 2018, 07:44
I like this scene, but the machine gun  at that 29 sec sounds quite flat like no bass for mine. While the atmosphere rumbling sound is there.

It could be due to calibration or dips or type of subs.

The scene should give a layered bass rumbling thru every shot, dependent on subs used, placement & calibration. Very satisfying.

Are u using a house curve and can share what model of subs is in your HT?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 08, 2018, 08:01
Ronil
Well said.

1) Placement works to fill the dips. Dual subs also help to fill dips.

2) Delay helps to ensure both subs are working in correct phase. 

3) PEQ helps to cut peaks and smooth FR.

4) Lastly, addition EQ to set the house curve to suit the bass to the owner's ears. This step has no right or wrong as it is totally up to the owner's discretion what he wants his home theater system to sound like as a whole.

Generally, the first 3 steps (in sequence) is very standard SOP. The last step is determined by what kind of bass the owner wants and how much the equipment can deliver before distortion or damage sets in. 

Some like chest punching mid-bass, some like infrasonic <20hz  bass, some like zero house curve... no wrong or right. This is the time for the owner to figure out what he likes and to set the house curve to suit his ears.

Tip : My findings were that Infrasonic bass is less likely to attract neighbourly complaints compared to mid-bass.

Yes u're right after bro ronildoq tweaking improvement on the mid-bass is noticeable,the dip @~60hz is room mode @ room width(9.5') as my seat is at center of it which had been lift up after we shift the left hand corner sub.Can google for Room Mode Calculator from Harman.
I'm running flat for now on movie,going to try lift 2 tilt 6 this weekend,music is on lift 3 tilt 6.
Same finding about the mid-bass got more chance to get compliant. The movie that I play when got compliant 2yrs+ ago is Fantastic 4(2015),from the graph can see it's 20hz~ on bass department: http://content.invisioncic.com/r161638/monthly_01_2016/post-20-0-90915800-1453681774.jpg
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 08, 2018, 08:50
Yes u're right after bro ronildoq tweaking improvement on the mid-bass is noticeable,the dip @~60hz is room mode @ room width(9.5') as my seat is at center of it which had been lift up after we shift the left hand corner sub.Can google for Room Mode Calculator from Harman.
I'm running flat for now on movie,going to try lift 2 tilt 6 this weekend,music is on lift 3 tilt 6.
Same finding about the mid-bass got more chance to get compliant. The movie that I play when got compliant 2yrs+ ago is Fantastic 4(2015),from the graph can see it's 20hz~ on bass department: http://content.invisioncic.com/r161638/monthly_01_2016/post-20-0-90915800-1453681774.jpg

Some movies already have a built in bass curve, so when u run the curve too steep it becomes very hot, but syok also... hahaha... end of the day, play few rounds and tweak to preference until you reach nirvana stage !
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 08, 2018, 08:56
bro ronil, I wonder if passive subwoofers will be a new challenge to calibrate?
if u can, I would love to invite u over my place to calibrate 4 of my pioneer passive "Car" subwoofers.
how buddy?
is it possible to calibrate passive subs?

Yes I believe it is possible, the main idea behind calibrating the subs is because the room becomes dominant down 300hz, as u go lower down the frequencies. As you go higher up the frequency from 500hz till 50khz the speakers will dominate, which leads to some audiophiles not liking EQ above the Schroeder frequency . The goal for calibrating the subs is to Ensure the rooms do not dominate in those frequencies 5-150hz
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 08, 2018, 09:04
I like this scene, but the machine gun  at that 29 sec sounds quite flat like no bass for mine. While the atmosphere rumbling sound is there.

This scene will give u a clean fast start stop rumbling effect, playing this clip u will be to tell how capable is the subs, the ability to reproduce subsonic frequency with speed, texture, accuracy and extension. The f18 rythmik can do that, very good
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on October 09, 2018, 15:59
This scene will give u a clean fast start stop rumbling effect, playing this clip u will be to tell how capable is the subs, the ability to reproduce subsonic frequency with speed, texture, accuracy and extension. The f18 rythmik can do that, very good

Definitely NO need shaker....
Correct fine tune/tweaking, no cancelation (from measurement) surely will vibrate everything especially when those beasts are moving...
gun shoot has bass too.

I helped my friend tune his dual sealed 12" SVS subs last Sunday, it could handle perfectly too!
All rattled from cupboard, ceiling and water ripple in the glass of water....This scene seriously has subsonic low and powerful midbass...
(OMG, hopefully, neighbor won't complain)

I think we can use this short clip to test the subwoofer. Thanks to your file bro! Nice clip !
 :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 09, 2018, 21:30
Becareful not to fry the subs, this clip will require a lot of amplifier power , make sure u have an infrasonic filter in place to protect the subs,  especially for a 12” subs, it’s not in the same league as the f18 rythmik
Title: Re: Official Rythmik Subwoofer Thread
Post by: mutant on October 09, 2018, 23:28
It could be due to calibration or dips or type of subs.

The scene should give a layered bass rumbling thru every shot, dependent on calibration and also subs used. Very satisfying.

Are u using a house curve and can share what model of subs is in your HT?

Currently now only on LV12S and only Audyssey XT32.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 10, 2018, 07:40
Becareful not to fry the subs, this clip will require a lot of amplifier power , make sure u have an infrasonic filter in place to protect the subs,  especially for a 12” subs, it’s not in the same league as the f18 rythmik

Bro,the intro clip of this movie is outstanding also,got lots of bass n surround effect,when the helicopter fly over from behind on left side can hear/feel the bass notes quite well.Maybe can upload this 1 also.
+1 on the ulf is more likely to fry the sub driver.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sigurros on October 10, 2018, 08:19
Hi all,

Have previously post links for Bass demo clips from AVS. Volume 1 to 5 (shared by AVS member Dykema)

Just to share with bros here who needs the clips.

https://drive.google.com/open?id=0B75wwH2WwWlrcVdsaFZISmFGVms

https://drive.google.com/open?id=0B75wwH2WwWlrZlVQcERNWXB4Y28

https://drive.google.com/open?id=0B75wwH2WwWlrRlhVamtwQlJrNFU

https://drive.google.com/open?id=0B75wwH2WwWlrSF9RSDVMWGpLUmc

https://drive.google.com/open?id=0B75wwH2WwWlrNW5CdWJYYVhtZGc

Will post this in Planet Bass as well.

TO bro ngsk: the clip you want is in Volume 2.
Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 10, 2018, 09:12
I like this scene, but the machine gun  at that 29 sec sounds quite flat like no bass for mine. While the atmosphere rumbling sound is there.

same here. can hear soft bass effect from my f15hp after i turn up 5db hot from the calibrate value. i place it beside my sofa.
the rest are fine, sofa are shaking.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 10, 2018, 09:17
Hi all,

Have previously post links for Bass demo clips from AVS. Volume 1 to 5 (shared by AVS member Dykema)

https://drive.google.com/open?id=0B75wwH2WwWlrcVdsaFZISmFGVms

https://drive.google.com/open?id=0B75wwH2WwWlrZlVQcERNWXB4Y28

https://drive.google.com/open?id=0B75wwH2WwWlrRlhVamtwQlJrNFU

https://drive.google.com/open?id=0B75wwH2WwWlrSF9RSDVMWGpLUmc

https://drive.google.com/open?id=0B75wwH2WwWlrNW5CdWJYYVhtZGc

Will post this in Planet Bass as well.

TO bro ngsk: the clip you want is in Volume 2.

Thanks bro,I've all these demo clips just don't know how to upload here.
Just a side note be careful with these few clips: 1.Lone Survivor-Gear-up
2.PULSE-Server Room(with dd true-hd 7.1 audio track) 3.All the HALO 4 clips.They all have very hot ulf so start with low volume first.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sigurros on October 10, 2018, 10:59
Cheers bro.

Another to add is the Hanna house raid.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 10, 2018, 12:54
Yes I like all the 4 clips from Hanna,they got different bass content from mid to low.The house raid go lower n got very good sound mix,the first 10 secs of the C-130 flyover 1 will give u heart attack thinking u had fried the sub.
For testing 20hz effect I recommend 2 clips: 1.OHF-C-130 attack,when that C-130 hit the Washington Monument tip,from it started to collapse till it fall on the ground all bass effect are centering @ 20hz n last for nearly 30 secs,it's recorded hot also.2.The Last Airbender-Waterwall,this 1 got 20hz effect through out but is on & off.
Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 10, 2018, 16:24
https://drive.google.com/file/d/1goKV-89wXGAUz-gnBjH-3Pnhj66DqZP2/view

Download this clip, then be careful, reduce the volume before playing this clip. Its got content down to 1hz. very deep bass, can fry your subs.

Watch timestamp 29 sec in this clip, she will fire the machine gun at the lycan, with speed....... There is a very fast start stop effect from the machine guns, clean rumbling.....

should the machine gun scene be impactful? or can hear the sub rumbling?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 11, 2018, 08:12
should the machine gun scene be impactful? or can hear the sub rumbling?

Yes it should, lower spine area, when firing rounds of bullets, less on the chest, heavy artillery, ideally you can feel the tactile energy of every single bullet, and it’s very fast. A kind of burst, stop burst stop energy, but with speed.

You r not supposed to hear anything from the subs, at this stage, everything is felt, pure tactile. The breath of the lycan part is the best for me, that scene creates very intense feelings.... aka Kan Cheong bass, like the boogeymen is coming

You shouldn’t hear any rattling sound also, that can take away the enjoyment
Title: Re: Official Rythmik Subwoofer Thread
Post by: sigurros on October 11, 2018, 08:42
Yes it should, lower spine area, when firing rounds of bullets, less on the chest, heavy artillery, ideally you can feel the tactile energy of every single bullet, and it’s very fast. A kind of burst, stop burst stop energy, but with speed.

You r not supposed to hear anything from the subs, at this stage, everything is felt, pure tactile. The breath of the lycan part is the best for me, that scene creates very intense feelings.... aka Kan Cheong bass, like the boogeymen is coming

You shouldn’t hear any rattling sound also, that can take away the enjoyment

Or can try the 13 hours scene where one bugger firing into zombie land.

Bro Ron,

For my setup, the above scene can feel the impact of the shots from my kk808.

But the lycan scene mentioned the machine gun bo simi impact.
Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 11, 2018, 10:18
Or can try the 13 hours scene where one bugger firing into zombie land.

Bro Ron,

For my setup, the above scene can feel the impact of the shots from my kk808.

But the lycan scene mentioned the machine gun bo simi impact.

ya lo. the machine gun bo impact. donno where go wrong. =(

using f12 front and f15hp beside sofa with both +5db hot.

maybe shall try re-calibration.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sigurros on October 11, 2018, 10:40
ya lo. the machine gun bo impact. donno where go wrong. =(

using f12 front and f15hp beside sofa with both +5db hot.

maybe shall try re-calibration.

But what about he 13 hours scene that i mentioned above?

https://drive.google.com/file/d/0B75wwH2WwWlrU0VoZ0JZREFMNGs/view?usp=sharing

timestamp = 0:54

Wu impact bo?  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: CASH on October 11, 2018, 11:27
I like this scene, but the machine gun  at that 29 sec sounds quite flat like no bass for mine. While the atmosphere rumbling sound is there.

same same for my setup... exactly like what bro mutant said. "Flat, but atmosphere rumbling sound is present"
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 11, 2018, 13:41
Or can try the 13 hours scene where one bugger firing into zombie land.

Bro Ron,

For my setup, the above scene can feel the impact of the shots from my kk808.

But the lycan scene mentioned the machine gun bo simi impact.

That Machine Gun scene not easy to replicate, so far ive only heard the F18 Rythmik & Seaton producing it. Its a deep bass type of impact. Not the normal midbass 45-55hz gunshot impact. I've had the FV15hp, that one couldnt produce this type of effect. My previous kk12012 High Pass engaged at 30hz, bottoms out when i played this scene. The Lycan walking into cave, Roar scene has extremely hot 30hz. The KK808 will bottom up even if high passed at 50hz. That is how intense this scene is.

So this is sort of like my go to scene to test the limits. so gotta be really careful here, not to blow the subs....
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 11, 2018, 13:53
ya lo. the machine gun bo impact. donno where go wrong. =(

using f12 front and f15hp beside sofa with both +5db hot.

maybe shall try re-calibration.

This one has nothing to do with calibration, more to do with the sub capability. i have tried it in the past, calibrated fv15hp, but it doesnt give me  that type of impact/texture. Its got very fine texture,detailed clean deep bass

some of the guys have experienced it, SDDS, Ralfale, Wechnivac, Sevenz, BADenglish

That is why the first scene i tested at NGSK's place was this scene..... i wanted to know how good the F18 rythmiks are.... It didnt disappoint
Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 11, 2018, 14:13
That Machine Gun scene not easy to replicate, so far ive only heard the F18 Rythmik & Seaton producing it. Its a deep bass type of impact. Not the normal midbass 45-55hz gunshot impact. I've had the FV15hp, that one couldnt produce this type of effect. My previous kk12012 High Pass engaged at 30hz, bottoms out when i played this scene. The Lycan walking into cave, Roar scene has extremely hot 30hz. The KK808 will bottom up even if high passed at 50hz. That is how intense this scene is.

So this is sort of like my go to scene to test the limits. so gotta be really careful here, not to blow the subs....

thanks for the enlightenment. guess there is nothing i can do other than change the sub. LOL
to protect the sub. should i turn on Rumble filter, mid damping, 28hz?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 11, 2018, 14:16
thanks for the enlightenment. guess there is nothing i can do other than change the sub. LOL
to protect the sub. should i turn on Rumble filter, mid damping, 24hz?

i used to switch rumble filter off, i turn on the Limiter instead..... Best is to calibrate the subs to know its limits, to be safe....
Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 11, 2018, 14:18
i used to switch rumble filter off, i turn on the Limiter instead..... Best is to calibrate the subs to know its limits, to be safe....

used to? means now u have it turn ON?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 11, 2018, 14:32
used to? means now u have it turn ON?

sorry, i meant when i was using the FV15hp, in the past..... I have sold it....
Title: Re: Official Rythmik Subwoofer Thread
Post by: wechnivag on October 11, 2018, 16:55
Using crowson TT on your setup, plus seaton F18 = no horse run.

Sent from my X9009 using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 11, 2018, 22:34

Currently now only on LV12S and only Audyssey XT32.

I havent tested the LVS12S before. My guess is LVS12S might not be able to give the desired bass tactile (or what ronil mentioned as texture) effect for this scene due to its output for low bass.

Need a sub that has good, sufficient and clean output (low distortion) for low bass.

I think minimum need a F15HP placed nearfield and calibrated properly to experience some form of tactile.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 11, 2018, 22:45
should the machine gun scene be impactful? or can hear the sub rumbling?

Yes, it should be layered and feeling the low rumble tactile on your lower parts of your sofa. Ronil's description is quite zhun.

And should not hear sub rumbling. Could u describe this sound you are hearing? are u referring to a 'rubbery sound' where you hear the cone moving or... ?

ya lo. the machine gun bo impact. donno where go wrong. =(

using f12 front and f15hp beside sofa with both +5db hot.

maybe shall try re-calibration.

Bro, if u up the F15HP gain by another 2-5db, see if u can feel the tactile from the bullets? Used to own a F15HP and i rem can feel some tactile when it's placed nearfield and tweaked to the ideal bass levels.

should i turn on Rumble filter, mid damping, 28hz?

Bro, follow Rythmik recommendation:
> Before running room EQ (Audyssey), turn off RF. set the Extension to 14hz/ Mid damping

After room EQ, Extension remain at 14hz. Damping set as HIGH for more layered/ articulate bass. For RF, u can try leaving it off or turning it on to see if there is any difference. Hope this helps! :) Let us know


Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 12, 2018, 07:12
If u got enough displacement leave the rumble filter off,set to on cut off lots of under 20hz content.Refer to this data-bass.com testing result of the F18 extension on different setting u'll understand what I mean: https://data-bass.com/data?page=system&id=145&mset=171
Click on the 'Extended charts'.
Uses the 'Comparable Charts' System Measurement Comparison to select if u wanted to compare 1 sub to another for output,etc.
Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 12, 2018, 10:01
Yes, it should be layered and feeling the low rumble tactile on your lower parts of your sofa. Ronil's description is quite zhun.

And should not hear sub rumbling. Could u describe this sound you are hearing? are u referring to a 'rubbery sound' where you hear the cone moving or... ?

i think should be cone moving.

Bro, if u up the F15HP gain by another 2-5db, see if u can feel the tactile from the bullets? Used to own a F15HP and i rem can feel some tactile when it's placed nearfield and tweaked to the ideal bass levels.

i placed it beside the sofa with cone facing the sofa about 20cm away. 5db is the maximum i should turn up after calibration?
Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 12, 2018, 13:57
Using crowson TT on your setup, plus seaton F18 = no horse run.

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crowson TT can only be bought directly through crowson?
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 12, 2018, 20:59
i placed it beside the sofa with cone facing the sofa about 20cm away. 5db is the maximum i should turn up after calibration?

Depends. My avr sub trim is usually -11db after room eq. After that, I adjust it up more than 15db till I get the tactile level I prefer. But I leave dyn eq and Dyn volume off. :)

U can try upping it and see if the bass tactile improves. Are you using any DSP?
Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 12, 2018, 21:02
Depends. My avr sub trim is usually -11db after room eq. After that, I adjust it up more than 15db till I get the tactile level I prefer. But I leave dyn eq and Dyn volume off. :)

U can try upping it and see if the bass tactile improves. Are you using any DSP?
wah. +15db. that's alot.

you up both sub tgt?

not using any dsp, however planning to get minidsp 2x4hd

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Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on October 13, 2018, 11:01
Depends. My avr sub trim is usually -11db after room eq. After that, I adjust it up more than 15db till I get the tactile level I prefer. But I leave dyn eq and Dyn volume off. :)

U can try upping it and see if the bass tactile improves. Are you using any DSP?

I was advised by two bass expert from SVS (Ed Mullen) and JL (Randy Wagner) to keep a balance between trim value and gain knob at subw.
We can up a little gain knob after room correction (but not too much) as sub also needs enough LFE signal (can't be too weak signal due to internal noise, S/N)
Does their advice make sense to you?
 
;)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 13, 2018, 11:36
wah. +15db. that's alot.

you up both sub tgt?

not using any dsp, however planning to get minidsp 2x4hd


Yup both subs tog. I'm using only 1 sub preout on the avr, that goes to my DSP that is connected to my 2 subs.

U won't regret the DSP :)

1 good thing about DSP is it has volume control, so it can be used to 'play' with the overall gain through the the digital chain. So this can be used to free up the digital headroom in a way. And allow setting a higher gain level in the subs knob itself to maximise 'reserves' on the tap e.g. setting subs at 3 o'clock.

When Dyn vol and Dyn eq disabled, we got to adjust it up much more after room eq. Plus my house curve is quite aggressive, so to get the mid bass tactile I need, I got to run the bass much hotter

What do you use 4 your Dyn eq and Dyn vol ?
Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 13, 2018, 14:34
I was advised by two bass expert from SVS (Ed Mullen) and JL (Randy Wagner) to keep a balance between trim value and gain knob at subw.
We can up a little gain knob after room correction (but not too much) as sub also needs enough LFE signal (can't be too weak signal due to internal noise, S/N)
Does their advice make sense to you?
 
;)
how to keep balance between gain knob and avr trim?  what's the ratio?

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Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 13, 2018, 14:35
Yup both subs tog. I'm using only 1 sub preout on the avr, that goes to my DSP that is connected to my 2 subs.

U won't regret the DSP :)

1 good thing about DSP is it has volume control, so it can be used to 'play' with the overall gain through the the digital chain. So this can be used to free up the digital headroom in a way. And allow setting a higher gain level in the subs knob itself to maximise 'reserves' on the tap e.g. setting subs at 3 o'clock.

When Dyn vol and Dyn eq disabled, we got to adjust it up much more after room eq. Plus my house curve is quite aggressive, so to get the mid bass tactile I need, I got to run the bass much hotter

What do you use 4 your Dyn eq and Dyn vol ?
I'm running reference level with DEQ without Dy vol after calibration.

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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 13, 2018, 17:40
I'm running reference level with DEQ without Dy vol after calibration.

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Ah i see. :)  deq engaged - means no need to up sub channel gain by so much as compared to deq off like mine.

Enjoy the tweaking bro. Let us know if you can get the tactile by upping the sub by another few dB. :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 13, 2018, 17:48
I was advised by two bass expert from SVS (Ed Mullen) and JL (Randy Wagner) to keep a balance between trim value and gain knob at subw.
We can up a little gain knob after room correction (but not too much) as sub also needs enough LFE signal (can't be too weak signal due to internal noise, S/N)
Does their advice make sense to you?
 
;)

makes sense generally. I assume their assumption is there is no DSP in the chain.

With a dsp in the chain, because the DSP has volume control, it allows u to 'play with the sub's amp gain' such that it can be at 3 oclock.

But I can't quite understand the purpose of your question. Is there something you wish to clarify bro?
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on October 13, 2018, 19:12
how to keep balance between gain knob and avr trim?  what's the ratio?

Sent from my SM-N950F using Tapatalk

Play around whatever numbers were given by Audy but should not be far away.
Anyway, it is just a suggestion from them... you can decide

 :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 15, 2018, 08:31
For setting up dual sub this thread might help,some very good advice from members n Mark Seaton: https://www.avsforum.com/forum/113-subwoofers-bass-transducers/2935848-paradigm-sub-2-vs-2x-svs-pb-16-ultra-vs-3.html
TS using dual PSA S7201 4X 18" woofers in 1 sub.
Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 15, 2018, 17:42
Yup both subs tog. I'm using only 1 sub preout on the avr, that goes to my DSP that is connected to my 2 subs.

U won't regret the DSP :)

1 good thing about DSP is it has volume control, so it can be used to 'play' with the overall gain through the the digital chain. So this can be used to free up the digital headroom in a way. And allow setting a higher gain level in the subs knob itself to maximise 'reserves' on the tap e.g. setting subs at 3 o'clock.

When Dyn vol and Dyn eq disabled, we got to adjust it up much more after room eq. Plus my house curve is quite aggressive, so to get the mid bass tactile I need, I got to run the bass much hotter

What do you use 4 your Dyn eq and Dyn vol ?

To tune the minidsp 2x4hd for subwoofer, i just need to go through the below guide right will be suffice???

1. https://www.minidsp.com/applications/acoustic-measurements/umik-1-setup-with-rew

2. https://www.minidsp.com/applications/auto-eq-with-rew

3. https://www.minidsp.com/applications/digital-crossovers/minidsp-2x4hd-application/282-2x4-hd-sub-integration
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 16, 2018, 07:54
Sometime room correction sw will do some strange correction to the sub channel: https://www.avsforum.com/forum/113-subwoofers-bass-transducers/2673865-official-jtr-speakers-subwoofer-thread-353.html
Go to post 10574 see what Audyssey/MCACC did to the sub channel. Sub distant tweaking however work great.
Also if u own a Denon or Marnatz avr/avp check that DRC is no engage when playing Dolby audio sound track. Some quotes from avsforum:

Originally Posted by mantaraydesign  View Post
'Anyone notice the bass is much more powerful while watching a DTS-HD Master Audio than the Dolby ATMOS soundtrack?
For example the movie Oblivion with Tom Cruise. When the rope was cut and Jack fell down, there's a huge bass sweep and I can feel the bass moving the furniture and rattling the windows. On the 4K version of this movie at the same scene, the bass was very weak. The furniture did not move and no rattling on the windows.
May have to stop buying Dolby ATMOS movies from now on. DTS-HD Master Audio is still the king of bass movies.'

Quote:
Originally Posted by beastaudio  View Post
'I think I have mentioned it in here before, but some Dolby soundtracks automatically engage DRC on Denon and Marantz units and you have to go into the menu to override it. It's the absolute worst screw up I could ever think of yet it remains in their units year over year, and likely causes 95% of their owners to not even have a clue it's happening.'

'What really sucks is my Marantz 7702 transitions to "Auto" DRC on all TrueHD/or Atmos tracks and doesn't allow it to be disengaged or adjusted at all.
In the words of Bruce Brazos (Dark of the Moon) "WTF to that??!!"
Some tracks it's very easy to hear the garbage results of said DRC (Skyscraper much!!!) and others make you wonder if the DRC is even active. (Sure enough it always is on any TrueHD/Atmos track)'
Just FYI.
New quote:
'On my Marantz SR6012 there's a Loudness Management setting that needs to be turned On before you can access the Dynamic Compression setting. Once I do that I can access Dynamic Compression and change it from Auto to Off. Maybe there's something similar on your pre/pro?'

'Regarding this drc thing with Denon/Marantz I just put in Jupiter Ascending uhd and checked. I have Loudness Management turned off and the dynamic compression is off too thank god.
(It says auto but is "greyed out" so it's off)
I switched between different sound modes as well and it remained off.
So I think as long as you have the Loudness Management off you should be good to go.
This is on my Denon x6200w
Edit: turned on loudness management, turned off dynamic compression, then turned loudness management back off.
Good to go!'
Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 16, 2018, 09:13
https://drive.google.com/file/d/1goKV-89wXGAUz-gnBjH-3Pnhj66DqZP2/view

Download this clip, then be careful, reduce the volume before playing this clip. Its got content down to 1hz. very deep bass, can fry your subs.

Watch timestamp 29 sec in this clip, she will fire the machine gun at the lycan, with speed....... There is a very fast start stop effect from the machine guns, clean rumbling.....

i shifted my f15hp sub directly behind my sofa.

now i can feel every gun shots, making the whole sofa vibrate!!! i have to turn down 2dB.

this was done without calibration, feels too boomy, not clean.

shall calibrate again during the weekend and try again.

as what the gurus here have always been emphasizing on, placement is VERY IMPORTANT!!
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 20, 2018, 18:20
To tune the minidsp 2x4hd for subwoofer, i just need to go through the below guide right will be suffice???

1. https://www.minidsp.com/applications/acoustic-measurements/umik-1-setup-with-rew

2. https://www.minidsp.com/applications/auto-eq-with-rew

3. https://www.minidsp.com/applications/digital-crossovers/minidsp-2x4hd-application/282-2x4-hd-sub-integration

not sure about the 2x4.

But here're some past links that i used for REW that helped me a lot:
https://www.dropbox.com/s/zdhq72a1puyyxpr/REW%20101%20HTS%20Current%20Version.pdf?dl=0
https://www.avsforum.com/forum/91-audio-theory-setup-chat/1449924-simplified-rew-setup-use-usb-mic-hdmi-connection-including-measurement-techniques-how-interpret-graphs.html
https://www.hometheatershack.com/forums/rew-forum/11707-room-eq-wizard-rew-information-index-links-guides-technical-articles-please-read.html

hope this helps for your REW :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 21, 2018, 10:43
not sure about the 2x4.

But here're some past links that i used for REW that helped me a lot:
https://www.dropbox.com/s/zdhq72a1puyyxpr/REW%20101%20HTS%20Current%20Version.pdf?dl=0
https://www.avsforum.com/forum/91-audio-theory-setup-chat/1449924-simplified-rew-setup-use-usb-mic-hdmi-connection-including-measurement-techniques-how-interpret-graphs.html
https://www.hometheatershack.com/forums/rew-forum/11707-room-eq-wizard-rew-information-index-links-guides-technical-articles-please-read.html

hope this helps for your REW :)

Lol... so much information to digest...

Just use the guide posted by Austin jerry in PDF file. Read it in conjunction with minidsp guide, that’s the best. The others are like outdated.... but you can read them when u r free, for better understanding, but doubt you will have the time to read through so many pages, and disorganised... the later versions all come with acoustic timing reference etc, so many things have changed since 2008 guide....

Austin jerry’s guide is very easy to understand, all written in a simple and easy to understand layman terms kind of explanation....
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on October 21, 2018, 12:06
The easiest is to read one of the recommended guides and ask someone to teach you, after you have tried with your own setup.

I’d be happy to teach anyone who requests for a lesson.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 21, 2018, 12:08
The easiest is to read one of the recommended guides and ask someone to teach you, after you have tried with your own setup.

I’d be happy to teach anyone who requests for a lesson.

+1 👍🏻👍🏻👍🏻
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 21, 2018, 14:14
Yea Jerry's one is good
Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on October 23, 2018, 13:58
The easiest is to read one of the recommended guides and ask someone to teach you, after you have tried with your own setup.

I’d be happy to teach anyone who requests for a lesson.

i would love to attend your lesson.  ;D

also, anyone around punggol area able to open their place for short audition? will love to understand how does a proper setup system should sound and feel like.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on October 23, 2018, 23:28
Exclusive, check your PM.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 24, 2018, 18:05
i would love to attend your lesson.  ;D

also, anyone around punggol area able to open their place for short audition? will love to understand how does a proper setup system should sound and feel like.

Exclusive, it’s important to also first read the basics, then try measure them yourself. Once you have covered the basics, go for the lesson, then it’s worth the time. Because then u will be asking meaningful and questions that make sense and this will help you a great deal. Until you try it personally, u will not know.

Put it this way, you can’t be asking questions if u don’t know what to ask. So yes, hands on with some basic first, you will appreciate the lesson better that way....

Some effort is required from our end.

Very nice of jag to offer his time to help, this type of opportunity don’t come knocking on the door all the time, be wise ! All the best in your journey !
Title: Official Rythmik Subwoofer Thread
Post by: Ccyao on October 24, 2018, 22:17
May I know if effective calibration can only be done with a minidsp?
I would love to learn as well but I do not have a minidsp.


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Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on November 01, 2018, 20:51
i shifted my f15hp sub directly behind my sofa.

now i can feel every gun shots, making the whole sofa vibrate!!! i have to turn down 2dB.

this was done without calibration, feels too boomy, not clean.

shall calibrate again during the weekend and try again.

as what the gurus here have always been emphasizing on, placement is VERY IMPORTANT!!
Thumbs up!). Can try BEQ old movies getting back the low basss.))

Sent from my SM-N9005 using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 01, 2018, 23:04
May I know if effective calibration can only be done with a minidsp?
I would love to learn as well but I do not have a minidsp.


Not necessarily Minidsp brand, but yes a DSP would allow u to calibrate your bass to your liking. If user interface and ease-of-learning is important to you, DSpeaker Antimode DC is a very easy-to-use DSP. I recall someone was selling his DC in the used section, quickly check it out to see if available if u keen.

But I would STRONGLY recommend to get DIRAC Live if u can. This is super good, SUPERB room EQ + you can do calibrate house curve etc. Steeper learning curve but it will bring you smiles! I would have moved to DIRAC if not for having a baby at home now which limits my HT time.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 01, 2018, 23:19
Thank you so much for your advice, Bro!
Will do some research on Dirac Live. But I'm quite dumb in this. Now still struggling with REW. If the learning curve is steep, it's going to take me a long long while. Haha


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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 02, 2018, 00:26
Thank you so much for your advice, Bro!
Will do some research on Dirac Live. But I'm quite dumb in this. Now still struggling with REW. If the learning curve is steep, it's going to take me a long long while. Haha



Dirac Live - If u dont wish to change your AVR to a DIRAC enabled one, then u have to get an external DSP like the DDRC DSPs. But which means you will have more 'gear' on your HT rack/ console. I find the NAD AVR a very interesting option as it has DIRAC LIVE inbuilt and dont need additional gear.

Antimode DC, IMO, will be a good start off point to play with if u want a more fuss free user-friendly solution for solely bass management only.

If learning curve is your worry, then my advice would be to quickly grab the used Antimode DC in the used section first, play and try it out. Cos it's rare for a used set to appear. Later on when u dont want it, can always resell it easily, with minimum loss.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 04, 2018, 12:50
Thanks bro, for your kind advice!

Yes, I've gotten the Antimode Dual Core.
Ralfle was very nice to spend some time explaining the basics to me and guided me on the calibration process.

Done the typical calibration followed by Audyssey calibration. Didn't have much chance to play with it as kids are having a lot of tuitions during this exam period.

First impression is that the bass is softer after going through the DC. Before that Audyssey set it to -11db, which I increased subsequently to -8db. With DC, Audyssey set it to -3.5db and I increased it to -0.5db.
Didn't do any tweaking yet.

Low bass is good for me. Slight improvement in the mid bass. But I hope to improve more on the mid bass. Ideally to have a bit of the chest thumping feeling.

Btw, I'm using dual LVX12 placed on the front left and right.


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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 04, 2018, 14:24
Nice nice :) congrats for your purchase! Hehe

Yes, the bass level shld be lower when it pass thru the DC as the  DC has a volume control inbuilt. use it to up it back. Plus the cutting of peaks will make the bass levels sound "softer" too. But u shld find that your bass is more clean and nice as u watch similar scenes. :) Very syok.

Now with DC, your overall calibration steps will kind of "change" a bit. Sharing some steps below in case it can help u.

1) run DC calibration. After DC calibration, do not apply any additional settings on DC yet except for DC volume.

2) Just B4 audyssey calibration, adjust the DC volume and sub's knob volume such that your audyssey calibration result will return -10db to -11db for the AVR's sub channel volume after audyssey calibration. An additional thing i do is I usually set sub's volume knob at 3 o'clock when I have DC in the chain to allow more headroom in digital chain.

3) Run audyssey.

4) (Right after audyssey calibration, at this step, personally I would turn off Dyn eq and Dyn vol as it will affect my house curve)

5) After audyssey calibration, set speakers to SMALL and then set xover freq. Then increase the DC volume and AVR sub channel volume till u get the bass level that will give u the syok mid bass thump using a familiar mid bass scene.

6) Next, use DC's LIFT function to set your house curve such that the lower bass (usually i use 20hz) sound as loud as the mid bass (usually i use 90hz)

7) Then, up the DC's volume and AVR's sub channel vol again till u get good mid bass tactile thump and low rumble tactile. AVR's sub channel volume should not be more than +2db to allow enough digital headroom on AVR.

8) Fine tune

9) if you find your sub bottoming out for the low bass scenes, apply a HP filter on the DC or enable the RUMBLE FILTER on your Rythmik.

This are the usual steps I go thru with DC in the chain that helps me get the bass and house curve i like. =) hope this helps!
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 04, 2018, 14:32
B4 audyssey calibration, adjust the DC volume and sub's knob volume such that your audyssey calibration will return -10 to -11db for the sub channel volume on avr after audyssey calibration. I usually set sub's volume knob at 3 o'clock when I have DC in the chain to allow more headroom in digital chain.

Thank you very much for the step by step instructions!
One question on the point above. Is this trial and error ?
When I run Audyssey, it will ask me to set the sub volume until it shows 75db. Do you mean I sub tune it to 65db and proceed with Audyssey calibration?


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Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on November 04, 2018, 14:41
Sevenz means to adjust the avr's LFE (adjust low) and sub gain knob (adjust high)  such sub gain is around 3pm, and audyssey reports closer to 80dB than 75dB.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 04, 2018, 14:44
I see. My sub knob is already at around 3pm position when I run the calibration.
Thanks


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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 04, 2018, 14:45
One question on the point above. Is this trial and error ? yes. Usually for the first few tries u trial and error. After that you be familiar with what vol levels on DC and your sub's knob to get -11db trim on audyssey calibration result.

When I run Audyssey, it will ask me to set the sub volume until it shows 75db. Do you mean I sub tune it to 65db and proceed with Audyssey calibration? Nono. Don't think you can hit -11db for sub trim using 65db showing on Audyssey. During this step, to get -11db trim on AVR for Audyssey calibration result, the sub loudness (ie. when Audyssey measures the sub volume) I usually use is around 80db. I will play with the sub's gain knob and DC vol to get the 80db. So in my case, e.g. my sub knob is at 3 o'clock and my DC vol is -10

Refined the steps in the previous post to be clearer. Sorry if it was confusing

Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 04, 2018, 22:28
Nice nice :) congrats for your purchase! Hehe

Yes, the bass level shld be lower when it pass thru the DC as the  DC has a volume control inbuilt. use it to up it back. Plus the cutting of peaks will make the bass levels sound "softer" too. But u shld find that your bass is more clean and nice as u watch similar scenes. :) Very syok.

Now with DC, your overall calibration steps will kind of "change" a bit. Sharing some steps below in case it can help u.

1) run DC calibration. After DC calibration, do not apply any additional settings on DC yet except for DC volume.

2) Just B4 audyssey calibration, adjust the DC volume and sub's knob volume such that your audyssey calibration result will return -10db to -11db for the AVR's sub channel volume after audyssey calibration. An additional thing i do is I usually set sub's volume knob at 3 o'clock when I have DC in the chain to allow more headroom in digital chain.

3) Run audyssey.

4) (Right after audyssey calibration, at this step, personally I would turn off Dyn eq and Dyn vol as it will affect my house curve)

5) After audyssey calibration, set speakers to SMALL and then set xover freq. Then increase the DC volume and AVR sub channel volume till u get the bass level that will give u the syok mid bass thump using a familiar mid bass scene.

6) Next, use DC's LIFT function to set your house curve such that the lower bass (usually i use 20hz) sound as loud as the mid bass (usually i use 90hz)

7) Then, up the DC's volume and AVR's sub channel vol again till u get good mid bass tactile thump and low rumble tactile. AVR's sub channel volume should not be more than +2db to allow enough digital headroom on AVR.

8) Fine tune

9) if you find your sub bottoming out for the low bass scenes, apply a HP filter on the DC or enable the RUMBLE FILTER on your Rythmik.

This are the usual steps I go thru with DC in the chain that helps me get the bass and house curve i like. =) hope this helps!
OK. I did step 1-5. Step 6 is what I need to digest a bit.
During Audyssey calibration, I have to bring the DC volume to -4.0 and my right sub volume knob to 4pm to achieve 80db.
Got -9.5db and -10.5db on left and right respectively after Audyssey calibration.
Then turned up the sub level in avr by 5db.
It sounds much better overall. Enjoyed a lot during my 30 mins of watching 12 Strong. But still feel a bit lacking on the chest thumping feel. Maybe I should consider adding a KK808 for the mid bass...


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Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on November 05, 2018, 09:57
Bro Ccyao have a read on this thread @avsforum especially section 'III-C: Cascading Crossovers:' might help with the mid bass improvement.
https://www.avsforum.com/forum/113-subwoofers-bass-transducers/2958528-guide-subwoofer-calibration-bass-preferences.html
Use the 'LIFT' increase the spl level,the 'TITL' control  @ which frq the 'LIFT' start working.Use 'LIFT' with caution maybe between 3~5,;TITL' can be from 3~6 to taste.

Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 05, 2018, 11:01
Bro Ccyao have a read on this thread @avsforum especially section 'III-C: Cascading Crossovers:' might help with the mid bass improvement.
https://www.avsforum.com/forum/113-subwoofers-bass-transducers/2958528-guide-subwoofer-calibration-bass-preferences.html
Use the 'LIFT' increase the spl level,the 'TITL' control  @ which frq the 'LIFT' start working.Use 'LIFT' with caution maybe between 3~5,;TITL' can be from 3~6 to taste.
Thanks for sharing Bro!
Wow! 760 pages of reading..
Will try to catch up.


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Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on November 05, 2018, 15:30
OK. I did step 1-5. Step 6 is what I need to digest a bit.
During Audyssey calibration, I have to bring the DC volume to -4.0 and my right sub volume knob to 4pm to achieve 80db.
Got -9.5db and -10.5db on left and right respectively after Audyssey calibration.
Then turned up the sub level in avr by 5db.
It sounds much better overall. Enjoyed a lot during my 30 mins of watching 12 Strong. But still feel a bit lacking on the chest thumping feel. Maybe I should consider adding a KK808 for the mid bass...


Hello Bro,
Congrats for your 'new toy'of DC and discovery journey begin;D

By reading on your discovery story, It seems DC can control LFE signal.
When you set (at -4), the LFE signal becomes so weak until you need to amplify it by dialing the gain knob up to 4pm in order to produce desired sound pressure level at 80db (your aim to get trim -11 sub level at your AVR).
At this condition, perhaps it won't burst your subwoofer driver but I wonder whether your amp plate will kaput faster one day?
Hmmm... Why not, you set to ZERO instead of -4 then turn down the gain knob from 4pm to 12n (safer zone).

Comparing to my 8033-SII... (79db for combined two subs, each sub: 74db - showed both subs are in-phase)
W/O : gain knob: 10:00, level sub: -4 (given by audy)
WITH: gain knob: 09:00, level sub: -10 (given by audy)
HT room: half of the Living room (EA type), use curtain to divide the room, becomes a square room.

From the above numbers, I could conclude that my SII is boosting up the LFE signal input to my subwoofers
SII is generating fix calibration ping noise and it depends on the gain knob of combine subs (in my case)...  VERY loud when I dial up to 10.00

(It looks SII and DC works differently)

???
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 05, 2018, 16:49
Hmmm... Why not, you set to ZERO instead of -4 then turn down the gain knob from 4pm to 12n (safer zone).
..
..

From the above numbers, I could conclude that my SII is boosting up the LFE signal input to my subwoofers
SII is generating fix calibration ping noise and it depends on the gain knob of combine subs (in my case)...  VERY loud when I dial up to 10.00

(It looks SII and DC works differently)

???
Thanks for the pointer, Bro!
Didn't cross my mind that I will be driving my sub too hard. Thought as long as end result is the same it will be fine.
Will re-calibrate based on your advice.

Ya, from your results it does seem that your SII is boosting the signal. So far based on what I have read, it seems like most will get a lower signal with Antimode..


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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 05, 2018, 18:33
OK. I did step 1-5. Step 6 is what I need to digest a bit.
During Audyssey calibration, I have to bring the DC volume to -4.0 and my right sub volume knob to 4pm to achieve 80db.
Got -9.5db and -10.5db on left and right respectively after Audyssey calibration.
Then turned up the sub level in avr by 5db.
It sounds much better overall. Enjoyed a lot during my 30 mins of watching 12 Strong. But still feel a bit lacking on the chest thumping feel. Maybe I should consider adding a KK808 for the mid bass...


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Nice! For the chest thump, if u try increasing the avr sub channel volume by few more dB, will u get the thump?

where are your 2 subs placed bro
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 05, 2018, 18:36
My sub is at the front left and right. My front speakers are sitting on top of the sub.


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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 05, 2018, 18:55
Hello Bro,
Congrats for your 'new toy'of DC and discovery journey begin;D

By reading on your discovery story, It seems DC can control LFE signal.
When you set (at -4), the LFE signal becomes so weak until you need to amplify it by dialing the gain knob up to 4pm in order to produce desired sound pressure level at 80db (your aim to get trim -11 sub level at your AVR).
At this condition, perhaps it won't burst your subwoofer driver but I wonder whether your amp plate will kaput faster one day?
Hmmm... Why not, you set to ZERO instead of -4 then turn down the gain knob from 4pm to 12n (safer zone).

Comparing to my 8033-SII... (79db for combined two subs, each sub: 74db - showed both subs are in-phase)
W/O : gain knob: 10:00, level sub: -4 (given by audy)
WITH: gain knob: 09:00, level sub: -10 (given by audy)
HT room: half of the Living room (EA type), use curtain to divide the room, becomes a square room.

From the above numbers, I could conclude that my SII is boosting up the LFE signal input to my subwoofers
SII is generating fix calibration ping noise and it depends on the gain knob of combine subs (in my case)...  VERY loud when I dial up to 10.00

(It looks SII and DC works differently)

???

Bro, can't compare the S2 and DC. Very different beast altogether.

0 is the max volume on DC. Advise not to set at 0 to allow more digital headroom on DC. -4 is better.

Will setting higher gain on sub's volume knob kapuut the sub amp faster? Mmm... I also not sure. :)

But setting sub's amp knob at higher levels closer to its max vol will give  some benefits when the time is called for during very demanding bass scenes ;) which some members articulated earlier in some posts in this thread. :)

Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 05, 2018, 18:58
0 is the max volume on DC. Advise not to set at 0 to allow more digital headroom on DC. -4 is ok.

Setting sub's amp knob at higher levels closer to its max vol will give  some benefits when the time is called for during very demanding bass scenes ;) which is articulated earlier in some posts in this thread.




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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 05, 2018, 19:00
My sub is at the front left and right. My front speakers are sitting on top of the sub.


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I can't remember. Whats the width and depth dimensions of your room ah bro
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 05, 2018, 19:02
3m (W) x 3.5m (L)


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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 05, 2018, 19:24
3m (W) x 3.5m (L)


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Ah got it. U try upping the avr sub channel volume, see if can get the chest thump?

If can't get, try change one sub's placement to a near field position to see if can get the chest thump tactile.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 05, 2018, 19:31
Ah got it. U try upping the avr sub channel volume, see if can get the chest thump?

If can't get, try change one sub's placement to a near field position to see if can get the chest thump tactile.
Thanks bro!
Will try to turn up the sub level later to try.

Unfortunately, my room is too small. Ever put it beside my recliner and the sub was blocking the lever of my recliner.


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Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on November 06, 2018, 10:38
One more thing, just curious to know,
Since DC makes input LFE becomes weak then I wonder whether 'digital and/or analog' noises will easily blend then affect your bass line?
(signal-to-noise ratio becomes small)

That's why I would prefer to make it balance.
Everything unbalance will be no good in this world right....  ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on November 06, 2018, 11:01
Why would a DC result in SNR getting worse? My experiences with DC and all other DSP EQs, LFE does not become weak nor get stronger.

Rather, the LFE is now better with no major room mode induced peaks.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 06, 2018, 21:23
Turned up the sub level by another 4db. That's in total 9db more than what Audyssey has set!!!
I'm not sure if I'm over doing it but I like how it sounds.
My only worry now is that my neighbours will come knocking at my door...


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Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on November 06, 2018, 21:25
Turned up the sub level by another 4db. That's in total 9db more than what Audyssey has set!!!
I'm not sure if I'm over doing it but I like how it sounds.
My only worry now is that my neighbours will come knocking at my door...


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Most important is what you hear and like best to u ears .))))) Cool)

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Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 06, 2018, 21:26
Most important is what you hear and like best to u ears .))))) Cool)

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Thanks bro!


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Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on November 06, 2018, 21:26
Most important is what you hear and like best to u ears .))))) Cool)

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Feel too cheers

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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 06, 2018, 22:02
Turned up the sub level by another 4db. That's in total 9db more than what Audyssey has set!!!
I'm not sure if I'm over doing it but I like how it sounds.
My only worry now is that my neighbours will come knocking at my door...

Woohoo! So nice! Happy that u like your bass better now bro. Syok right haha... Can u feel chest thump sensation now or it's just improved?

haha agreed too with bros here that most impt is how it sounds to u.

Don't worry about 9db. +9db is normal and it sounds about right bro. For me, after Audyssey, I tune up 10-11db on AVR's sub ch vol, and another 6-8db on Antimode DC. My Dyn EQ and Dyn volume is disabled, so have to up it a bit more. ;) plus my house curve is quite steep (once I apply lift, my whole FR will slant downward and this causes the midbass levels to be lowered. Means the midbass sensation would be gone), so i have to "compensate" by increasing the overall sub volume to get back the midbass sensation. So total is like +16-19dB, for me.  ;D ;D Is your Dyn EQ and Dyn vol enabled or disabled?

If u like what u are hearing now, suggest u try this next and see if u like it:
1) remember how your mid bass feels like now
2) apply LIFT (try anywhere between 4 to 6) on your DC to enable house curve so that your low bass will sound as loud as your mid bass in your ears
3) then, increase your sub's overall gain (by DC volume or AVR's sub ch vol) such that the mid bass thump in chest is the same as before you do step 2 above.
4) fine tune

see if u like what u hear/ feel ;)
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 06, 2018, 22:12
Woohoo! So nice! Happy that u like your bass better now bro. Syok right haha... Can u feel chest thump sensation now or it's just improved?

haha agreed too with bros here that most impt is how it sounds to u.

Don't worry about 9db. +9db is normal and it sounds about right bro. For me, after Audyssey, I tune up 10-11db on AVR's sub ch vol, and another 6-8db on Antimode DC. My Dyn EQ and Dyn volume is disabled, so have to up it a bit more. ;) plus my house curve is quite steep (once I apply lift, my whole FR will slant downward and this causes the midbass levels to be lowered), so i have to "compensate" by increasing the overall sub volume. So total is like +16-19dB, for me.  ;D ;D Is your Dyn EQ and Dyn vol enabled or disabled?

If u like what u are hearing now, suggest u try this next and see if u like it:
1) remember how your mid bass feels like now
2) apply LIFT (try anywhere between 4 to 6) on your DC to enable house curve so that your low bass will sound as loud as your mid bass in your ears
3) then, increase your sub's overall gain (by DC volume or AVR's sub ch vol) such that the mid bass thump in chest is the same as before you do step 2 above.
4) fine tune

see if u like what u hear ;)
Thanks Bro!
Feels relieved after hearing that you increased more than me. Haha
I disabled both dyn EQ and Vol after calibration. After testing I still prefer to set dyn Vol as low. Dyn EQ remains disabled.
I will try the next steps. Thanks


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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 06, 2018, 22:19
I disabled both dyn EQ and Vol after calibration. After testing I still prefer to set dyn Vol as low. Dyn EQ remains disabled.

Don't mention! Happy to help and share.

Could u share what made u prefer dyn vol to be LOW? e.g. because the bass sounds stronger, dialogue sound better etc. I used to prefer Dyn Vol LOW in the past too.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 06, 2018, 22:20
Don't mention! Happy to help and share.

Could u share what made u prefer dyn vol to be LOW? e.g. because the bass sounds stronger, dialogue sound better etc. I used to prefer Dyn Vol LOW in the past too.
Main because of the dialogue..


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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 06, 2018, 22:31
Main because of the dialogue..


i see. same same.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 06, 2018, 22:34
i see. same same.

but after i saw what Dyn Vol LOW did to my desired house curve's FR and bass at different main volumes, i decided to turn it off. What worked for me was - i turned it off, then i increased the sub's overall volume, and watched my movies at a higher main volume. That produced the same dialogue i wanted, and yet able to get the bass.
I see.
I have tried your method but feel that the surround and bass will be too loud at the desirable dialogue level...


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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 06, 2018, 22:49
(sorry, removed, wrong graph :)  )
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 06, 2018, 23:15
Thanks for sharing Bro!
Seems like the FR are on dyn EQ instead of dyn Vol..


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Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 06, 2018, 23:26
Oops! Ya, sorry i posted wrong graph and i mixed them up... sorry bro. removed it.

Ignore my previous post #787 too cos I mixed up the two i think. :) Thanks for pointing out.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Ccyao on November 06, 2018, 23:28
Oops! Ya, it's wrong graph and i mixed them up... sorry bro. removed it. :) Thanks for pointing out.
Np Bro!
Really appreciate your guidance!


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Title: Re: Official Rythmik Subwoofer Thread
Post by: exclusive on November 19, 2018, 09:50
Exclusive, check your PM.

i will like to say a big thank you to Bass Master Jag for spending his precious weekend to teach me the basic of REW how to integrate the bass and LCR together. the dialog is really very clear.

also show a demo on how a ideal bass system should sound and feel like. especially the Lone survivor gear up and deployment scene. literally can feel that im in the helicopter, the wind from the sub and vibration of the sofa.

for now, i shall save up for the minidsp ddrc-88a (cost almost the same as my avr :-X) instead of the 2x4hd. get it done right once and for all.

once again, a big thank you to Jag, after this session, i gain more insight and knowledge and in the future gonna disturb him more after i have try out REW and install the minidsp. please don find me a niusance  :P :P :P
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on December 30, 2018, 13:40
yesterday i happened to drop by KEC for some demo, before heading down, dropped by NGSK place, passed him his SMT wings, and then demoed the rythmik 3xF18

WOW!! Absolute beast in that small room, the 18' can slam hard for midbass... Only minor issue is the decay times, ive advised Ng to go with bass trap panels in that room, dihedral mount.... After that, nothing needs to be done. Very good!

Midbass and Deepbass all clean down to at least 8hz min in that room i demoed.

We were listening at Reference volume..... no issues, enjoyable....

Highly recommended the Rythmik F18
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 23, 2019, 12:03
G 25 on it way also.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 23, 2019, 12:19
Your order to be send to you this afternoon,...
(https://i308.photobucket.com/albums/kk329/ckpeng/IMG_5488_zpscogm3gtt.jpg)

Thanks for all your support
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on January 23, 2019, 23:56
Those FV25HP are really top performance subs from all that I have experienced.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on January 24, 2019, 15:08
Another happy owner, :P
http://www.xtremeplace.com/yabbse/index.php?topic=281744.msg1296566#msg1296566
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on January 24, 2019, 15:36
No love for sealed F18/G25hp? ;D ;D ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on February 03, 2019, 21:04
The designer himself explain how the limiter/led light on the HX1000/2000 amp work + why with 2 pin power plug:
'Limiter
I need to explain a bit our limiter. Our limiter is triggered when the output is within say 4 voltages of power rail. It will reduce the gain momentarily for a couple of seconds. This triggering method preserve the amplifier headroom because power rail can change due to load condition and whether the load is constant like music or momentarily like in HT. Some 15 years ago I told John (Stryke Audio) that it will good to put in an indicator like that. His comment was no one will look at it. I hope my customers do look at them. So I designed those HX amps with Hypex modules to have LED serve as a dual purpose indicator. It can blink error code (with amp shuts off and blink repetitively pattern), or it can blink momentarily to indicate amp close to clipping. I also make the LED flash twice when it changes from RED to GREEN because no-one else does that. If someone (or my supplier) copies my microcode, I will immediately know that. Regardless, if the limiter blinks in very short interval, it is best to check we can improve the efficiency of a setup. Maybe adding a second unit, limit the low end extension, or make sure room EQ does not boost room nulls.
If one sees LED blinking every few minutes, it may still be ok. But a lot of times, just back down the master volume a couple of dbs, the LED will stop blinking. In addition, if one plays the same type of music over extended period of time (like 2-4 hours) at high SPL, checking LED at the first half an hour is not enough. Even if the LED does not blink at first, it can possibly start blinking after one hour. This is because of the thermal stress on the voice coil. When voice coil is heated up, the output from the driver will drop. With servo, it will correct the output drop by supplying more power to the driver,... until the amp maxes out and trigger the limiter. In case like this I suggest back down the master volume level until the LED does not blink anymore. That will also prolong the driver's lifetime. Most of times, 1-2db or so will do the trick.'
Quote:
Originally Posted by RichardPryor  View Post
Any reason why the cable that came with them doesn’t provide for ground? Will having the subs grounded mess with something? I will need to get a new cable to run them at 220v so might have to improvise something if I don’t want them to be grounded.

'It does not have ground pin because it is class-2 compliant. We made this change in HX1000/HX2000 and we receive no calls about ground loop anymore. Most AVRs these days are also class-2 compliant.'
According to this post on avsforum a dual 18" sub from Rythmik 'is coming':
Quote:
Originally Posted by javan robinson  View Post
......
Enrico, when will the FV28HP be ready!?

'A few months back I would have said, not a chance that a FV28HP would happen, well as of today I can’t say the same.'
Enrico Castagnetti @ Rythmik Audio

Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on February 03, 2019, 22:25
Wow dual 18s Fv28  :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on February 04, 2019, 08:18
Hmmmm.............
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on February 04, 2019, 09:26
This dual fv28hp with servo looks like it’s gonna be the real deal !!

This Will provide all the headroom one will ever need in HDB homes !
Title: Re: Official Rythmik Subwoofer Thread
Post by: rayleh on February 04, 2019, 09:53
This dual fv28hp with servo looks like it’s gonna be the real deal !!

This Will provide all the headroom one will ever need in HDB homes !

Really? Can’t imagine if this beast is being cranked up. The whole flat and the neighboring unit will shake. I am curious how much the neighbors can take it. I was cranking up my dual SW12 over the weekend and felt it may be quite disturbing to the neighbors. Maybe I am not used to loud bass.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on February 04, 2019, 10:13
This dual fv28hp with servo looks like it’s gonna be the real deal !!

This Will provide all the headroom one will ever need in HDB homes !

I think they've make the right move to provide a dual 18" sub as in my experience stacking 2 F18s provide way more tactile respond n mid bass slam then a single 1 at the same spot. The only issue is the ported 1 will be huge n heavy but if u're serious about ulf this is worth waiting if it's really coming.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on February 04, 2019, 10:31
Guys, big subs is not meant for ear drum busting SPLs.

It’s meant for pushing <16hz SPLs. 12” & 15” is enough to give good headroom for mid bass slam in typical HDB.

Dual 15” FV25HP is more than enough to meet 115dBC @12hz in a 6m x 3.5m room.

Title: Re: Official Rythmik Subwoofer Thread
Post by: desray on February 04, 2019, 15:40
Guys, big subs is not meant for ear drum busting SPLs.

It’s meant for pushing <16hz SPLs. 12” & 15” is enough to give good headroom for mid bass slam in typical HDB.

Dual 15” FV25HP is more than enough to meet 115dBC @12hz in a 6m x 3.5m room.



+1.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on February 06, 2019, 09:44
Bros, IMO going for bigger woofers main focus should be efficiency on ulf playback rather than 'for more spl' this u guys already covered. ;)
Timing to play ht is the main factor when come to complaint for neighbors,for the past 5+yrs I got only 1 complaint which is due to never stick to my own restriction on ht playing timing,yes I restricted the timing to be only during weekends/holidays afternoon 12~5pm,morning/night only music listening.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on February 07, 2019, 10:13
Here is a thread on avsforum where they compare subs from different makers in their own room,from there can have a idea about what sub best suit what room/hall layout.
https://www.avsforum.com/forum/113-subwoofers-bass-transducers/3018282-subwoofer-comparisons-impressions.html
Happy reading!
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on February 07, 2019, 16:54
Here is a thread on avsforum where they compare subs from different makers in their own room,from there can have a idea about what sub best suit what room/hall layout.
https://www.avsforum.com/forum/113-subwoofers-bass-transducers/3018282-subwoofer-comparisons-impressions.html
Happy reading!

very good read up thks so m NGSK Bro.
I got the same experience too when i got the FV18 vs the PSA V1811. ( got the chance) The PSA V1811 r v well compact built with solid MID bass slam.

PS : I just got used to " Rythmik" Sound Signature.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 07, 2019, 20:12
very good read up thks so m NGSK Bro.
I got the same experience too when i got the FV18 vs the PSA V1811. ( got the chance) The PSA V1811 r v well compact built with solid MID bass slam.

PS : I just got used to " Rythmik" Sound Signature.

Ooo nice. Thanks for sharing your impressions! :) Seems like the v1811 is designed more for midbass slam

If possible, could u share further impressions of the fv18hp Vs v1811?
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on February 07, 2019, 21:16
Ooo nice. Thanks for sharing your impressions! :) Seems like the v1811 is designed more for midbass slam

If possible, could u share further impressions of the fv18hp Vs v1811?

Sure bro my pleasure.

Physical size:
Fv18 is very tall, almost double of V1811
V1811 enclosure is like FV15HP size
Review is here:
http://www.xtremeplace.com/yabbse/index.php?topic=280606.0

Both got it strength.
FV18 Punchiness > V1811 ( Which I really love the " Rythmik" Sound Signature)
Mid bass well is SOLID and PUNCH A*S
It can go very deep , clean and Loud within almost no heard port distortion

PSA Mid Bass is  full , thicker and can can go low too which it can rumble solid too.
Cannot under estimate the MId bass SPLS levels of this Sub AWesome.
It's 1 of the most compact size 18 Vented\Ported Sub out there in the market
 Have consulted TOM from PSA:
The V1811 is not designed to go down to 10hz.
14-16hz (in room) is the usally deep bass extension

There should be upcoming demo of Dual PSA V1811 soon by a fellow member here.
Welcome for Sub demo if interested :)
Enjoy HT bros.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on February 07, 2019, 22:22
Sure bro my pleasure.

Physical size:
Fv18 is very tall, almost double of V1811
V1811 enclosure is like FV15HP size
Review is here:
http://www.xtremeplace.com/yabbse/index.php?topic=280606.0

Both got it strength.
FV18 Punchiness > V1811 ( Which I really love the " Rythmik" Sound Signature)
Mid bass well is SOLID and PUNCH A*S
It can go very deep , clean and Loud within almost no heard port distortion

PSA Mid Bass is  full , thicker and can can go low too which it can rumble solid too.
Cannot under estimate the MId bass SPLS levels of this Sub AWesome.
It's 1 of the most compact size 18 Vented\Ported Sub out there in the market
 Have consulted TOM from PSA:
The V1811 is not designed to go down to 10hz.
14-16hz (in room) is the usally deep bass extension

There should be upcoming demo of Dual PSA V1811 soon by a fellow member here.
Welcome for Sub demo if interested :)
Enjoy HT bros.

so good, thanks bro!
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on February 28, 2019, 08:15
Explanation of how Rythmik sub servo works from Brain Ding himself:

'First, servo subs address memory effects of spider and surround material. The memory effect is one of the reasons bassline is blurred (or less rhythm, not rythmik enough). When you play a sequence of notes, how does the previous note change the "state of the driver" and how that affect the next note is called memory effect. The ideal transducer is zero memory effect. Today there is no test to reliably test memory effect. For electronics, there has been staircase waveform or other proposed methods. But none of that works for subwoofers because subwoofer distortion is so high that one cannot separate harmonic distortion from memory distortion. So how do I know the memory effect is reduced in our servo subwoofers? Because I have a mathematical model to calculate the factor.
Second, less boxy sound. Drivers produce sound on both sides of cone. Where does the energy from back of the cone go? If the back energy can bounce back and hit the cone and cause the cone to move even minutely, that back wave energy (we call re-radiation) will be mixed with the next note. Now the cone is being moved and energy is now on the cone and that energy can again produce a yet more minute back wave into the box. Servo addresses this problem. When the first back wave comes back to the cone, servo feedback detects the cone movement and exerts an opposite "damping force" to counteract the cone movement. So two things happen. The first is the cone movement is reduced by a factor of 3x. Second, the amplifier force produced by the servo feedback is a "damping" force so it dissipates more energy during this counteraction process. That leads to even faster decay of boxy sound.
Third, servo corrects the low frequency response without calibration. How many manufacturers assemble their subwoofers next to an anechoic room? If they do, how much would that subwoofer be? This is important because wavelength is longer at the low end and any anomaly will be audible "over time" and that is also where all the EQ and curve correction happens with non-servo subs. We all can send a unit to Josh to test. But what is the mechanism to ensure the production units are 95% or even 99% close to that unit? This is called product consistency. Servo has absolutely huge advantage over DSP EQ because the variability of T/S parameters are in the feedback loop. DSP EQ cannot possibly know the T/S parameters of the driver.
The above are just some reasons that go beyond what Josh has tested. But that does not mean we think Josh test is less important. What good does servo do if we cannot even perform better with Josh's tests. But again science is relative to knowledge. We know there are other factors affecting the sound quality. What kind of objective and repeatable tests we can come up? Unfortunately most of are infatuated with DSP and think DSP can address everything. DSP is just as smart as we are. If we don't have the model for the problem that we want to address, DSP is not gonna solve it for us.'
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on March 12, 2019, 08:35
Explanation of how Rythmik sub servo works from Brain Ding himself:

'First, servo subs address memory effects of spider and surround material. The memory effect is one of the reasons bassline is blurred (or less rhythm, not rythmik enough). When you play a sequence of notes, how does the previous note change the "state of the driver" and how that affect the next note is called memory effect. The ideal transducer is zero memory effect. Today there is no test to reliably test memory effect. For electronics, there has been staircase waveform or other proposed methods. But none of that works for subwoofers because subwoofer distortion is so high that one cannot separate harmonic distortion from memory distortion. So how do I know the memory effect is reduced in our servo subwoofers? Because I have a mathematical model to calculate the factor.
Second, less boxy sound. Drivers produce sound on both sides of cone. Where does the energy from back of the cone go? If the back energy can bounce back and hit the cone and cause the cone to move even minutely, that back wave energy (we call re-radiation) will be mixed with the next note. Now the cone is being moved and energy is now on the cone and that energy can again produce a yet more minute back wave into the box. Servo addresses this problem. When the first back wave comes back to the cone, servo feedback detects the cone movement and exerts an opposite "damping force" to counteract the cone movement. So two things happen. The first is the cone movement is reduced by a factor of 3x. Second, the amplifier force produced by the servo feedback is a "damping" force so it dissipates more energy during this counteraction process. That leads to even faster decay of boxy sound.
Third, servo corrects the low frequency response without calibration. How many manufacturers assemble their subwoofers next to an anechoic room? If they do, how much would that subwoofer be? This is important because wavelength is longer at the low end and any anomaly will be audible "over time" and that is also where all the EQ and curve correction happens with non-servo subs. We all can send a unit to Josh to test. But what is the mechanism to ensure the production units are 95% or even 99% close to that unit? This is called product consistency. Servo has absolutely huge advantage over DSP EQ because the variability of T/S parameters are in the feedback loop. DSP EQ cannot possibly know the T/S parameters of the driver.
The above are just some reasons that go beyond what Josh has tested. But that does not mean we think Josh test is less important. What good does servo do if we cannot even perform better with Josh's tests. But again science is relative to knowledge. We know there are other factors affecting the sound quality. What kind of objective and repeatable tests we can come up? Unfortunately most of are infatuated with DSP and think DSP can address everything. DSP is just as smart as we are. If we don't have the model for the problem that we want to address, DSP is not gonna solve it for us.'

Nice sharing bro, the F18 rythmik is just absolute class, among all the rythmik, this is one of my favourite subs! Superb extension deep Low with intense SPLs and very clean sounding and dynamic , perfect choice, very Low distortion, great stuff

G28 will be an absolute beast !
Title: Re: Official Rythmik Subwoofer Thread
Post by: dc71 on March 17, 2019, 09:19
@econav can you give me a price and lead time for one or two pieces of Rythmik L12 in white?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 17, 2019, 12:18
Sorry , we not bring in this model for local market.
you can goto our dealer’s shop,
EARTH SOUND at 02-33 The adelphi to see another model LVX 12 for local .
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on June 27, 2019, 12:59
As there're some exchange on how the gain/volume knob on sub work n their position to the actual sub max output,I found this article from PSA website that better explain it: https://www.powersoundaudio.com/pages/gain-control
Another thread to share is regarding gain match multiple identical subs b4 room correction eq them:  https://www.avsforum.com/forum/113-subwoofers-bass-transducers/3075314-calibrating-dual-subwoofers-w-audyssey.html
Post 6 show the whole process with measurements.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on June 27, 2019, 13:27
As there're some exchange on how the gain/volume knob on sub work n their position to the actual sub max output,I found this article from PSA website that better explain it: https://www.powersoundaudio.com/pages/gain-control
Another thread to share is regarding gain match multiple identical subs b4 room correction eq them:  https://www.avsforum.com/forum/113-subwoofers-bass-transducers/3075314-calibrating-dual-subwoofers-w-audyssey.html
Post 6 show the whole process with measurements.

Great sharing ! I would second that gain matching technique, this is the technique I deploy when using the seatons quad f18, I prefer this approach to level matching
Title: Re: Official Rythmik Subwoofer Thread
Post by: Djblackfm on June 27, 2019, 13:56
As there're some exchange on how the gain/volume knob on sub work n their position to the actual sub max output,I found this article from PSA website that better explain it: https://www.powersoundaudio.com/pages/gain-control
Another thread to share is regarding gain match multiple identical subs b4 room correction eq them:  https://www.avsforum.com/forum/113-subwoofers-bass-transducers/3075314-calibrating-dual-subwoofers-w-audyssey.html
Post 6 show the whole process with measurements.
Wow good read. Thanks for the information sharing bro.

Sent from my SM-G965F using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 15, 2019, 16:44
You want stack........
You want small size.........
You want hair standing bass........

We will release this model L22 for the local market, demo is ready ,text 96387418 to arrange.
http://www.rythmikaudio.com/L22.html
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 17, 2019, 20:21
Ready for action next week...
(https://uploads.tapatalk-cdn.com/20190817/69d03bbabc6846dcaab92d01e224dd8e.jpg)
(https://uploads.tapatalk-cdn.com/20190817/e0acb20c559c3294480b3c4595e7bacb.jpg)
(https://uploads.tapatalk-cdn.com/20190817/5815a990844f98319c6306b468a15b95.jpg)(https://uploads.tapatalk-cdn.com/20190817/9e972c13f1c3fc6a69e80733b5731cc4.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 20, 2019, 21:20
Rythmik F15HP , F18 , FV18 and G25 also ready for demo .
For those already tested the F18 , look out of the follow shipment coming out on sales post

Whatsapp 96387418 for a demo at night with your very own test disc ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on August 24, 2019, 20:03
'G22 and FVX12 Status!!
OK. I need to make an amendment. The G22 is in the works. In fact, enclosures are already in production and waiting just for the amps to be ready. The big change is that the "Quick Guide" that mentions the G22 won't apply as the amp would be the HX800XLR3, same amp used on the F25. Driver used in the G22 is DS1204. The dimensions are similar to the LVX12 and the G22 would be available in Black Oak and Piano Gloss. Price for the G22 Black Oak would be around $1399 shipped and for the Piano Gloss a bit more, more than $1499 shipped for sure. The G22 should arrive in Nov container, right for the holidays. Also, in the Sep 3rd container we have FVX12s coming as well. Same box as LVX12 with aluminum cone driver. Price would be $100 more than LVX12. Also, for another $100, you can get the FVX12 with A370XLR3 amp. That is all I have to share for now!! In about two weeks, I may have another "BIG" announcement'

According to the Rythmik guy post @avsforum,2 new models coming: dual opposed 12" G22 n FVX12 with aluminum cone. That 'BIG' announcement could be the dual opposed 18" G28 as currently there're 2 under custom built by Salk Sound @USA,it's said to have same carbinet size as FV25hp,but they might surprise everyone with the 'FV28' ported. Personally would like to see the sealed F28 been release as dual opposed need much more floor space.
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on August 24, 2019, 20:12
'G22 and FVX12 Status!!
OK. I need to make an amendment. The G22 is in the works. In fact, enclosures are already in production and waiting just for the amps to be ready. The big change is that the "Quick Guide" that mentions the G22 won't apply as the amp would be the HX800XLR3, same amp used on the F25. Driver used in the G22 is DS1204. The dimensions are similar to the LVX12 and the G22 would be available in Black Oak and Piano Gloss. Price for the G22 Black Oak would be around $1399 shipped and for the Piano Gloss a bit more, more than $1499 shipped for sure. The G22 should arrive in Nov container, right for the holidays. Also, in the Sep 3rd container we have FVX12s coming as well. Same box as LVX12 with aluminum cone driver. Price would be $100 more than LVX12. Also, for another $100, you can get the FVX12 with A370XLR3 amp. That is all I have to share for now!! In about two weeks, I may have another "BIG" announcement'

According to the Rythmik guy post @avsforum,2 new models coming: dual opposed 12" G22 n FVX12 with aluminum cone. That 'BIG' announcement could be the dual opposed 18" G28 as currently there're 2 under custom built by Salk Sound @USA,it's said to have same carbinet size as FV25hp,but they might surprise everyone with the 'FV28' ported. Personally would like to see the sealed F28 been release as dual opposed need much more floor space.


Wow endgame endgame lai lai. )
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 24, 2019, 20:37
you all will have the first hand to play with , who want to open house first ...!
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on August 24, 2019, 21:00
High chance G28HP and FV28HP
Dual opposed sealed 18’s and dual ported 18’s.

Hopefully a good preorder pricing... :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on September 20, 2019, 19:23
Sep stock started deliver and collection for small F12 ,Lv212 from tomorow onward.
Thanks for your support

(https://uploads.tapatalk-cdn.com/20190920/d0161dc5b735618f6cc62626ea3139ba.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 05, 2019, 09:43
'FV28 Part 1 Status!!
Hi guys!!!
Sorry for the delay but I was waiting for the boss authorization to post these pictures. These are the 3D renderings I had since a couple of months ago. The FV28 is happening for real as you will see on Part 2 coming in a few mins.'

This come out today @avsforum,yes a dual 18" FV28 with paper cone drivers is coming for sure this time! For pics n more info refer to post #40272 onward of this thread: https://www.avsforum.com/forum/113-subwoofers-bass-transducers/1214550-official-rythmik-audio-subwoofer-thread-1343.html
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 05, 2019, 11:54
The g25 dual oppose from rythmik looks really promising. If they ever come out with the G28 dual oppose design with servo, then this one has to be contender for end game for subwoofer...
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 05, 2019, 13:34
WOW

30% taller than my FV18...
Look like a Paper Cone Dual 18"s FV28 Monster to be unleased cheers

4 Ports , massive winder. :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 05, 2019, 14:01
Last shipment on SEP , we deliver few G25HP .
F18 will soon be demo in the retail again.
FV28 and G28 , should be here for Xmas.....
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on October 05, 2019, 15:04
The FV28hps are 2-3dBs higher headroom than the FV25HPs from AVS. Judging from my FV25HP performance, the 28s will be a top performer in most aspects.... except the WAF.

With so much headroom and power from FV25HP, the FV28HP will no doubt be a top performer in terms of power and control.

Those entertaining the idea of dual FV28HPs (or even FV25HP twins), I can 99% guarantee you will be 100% satisfied.....cos I know I am.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 05, 2019, 16:47
Wow! Very nice ! Looking forward to the arrival of the fv28hp and g28 come Christmas!

I believe it’s the end game for subs
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 05, 2019, 19:41
Wow!G28 also coming liao,for bros with big space n prefer sealed sub this is the top choice from Rythmik sealed subs.
Title: Re: Official Rythmik Subwoofer Thread
Post by: kaydee6 on October 05, 2019, 19:45
A pertinent question is how much?
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on October 05, 2019, 21:37
Definitely more than the fv25.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 05, 2019, 22:29
A pertinent question is how much?

bro, u poisoned BEQ d huh? lol

Go straight with 18' if have the space..... Hoot, clean, nice and detailed with lotsa weight.... the Rythmik G28 dual oppose with servo will be no slouch ...... or wait for the F18 on sales thread  ;D ;D...  :o

As you have experienced also, its not about bringing the building or block down, its the sheer class of tonal balance with details when the subs dig deep enough for the feeling, very immersive with ULF.....

cant wait to check out the G28 myself... hahaha.... ownself poison ownself....
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 06, 2019, 08:43
A pertinent question is how much?

'Size is definitely a challenge. Earlier today I want to haul it (with package box in place) to my test room with carpet and etc (where I measure and design the servo network) , I ran into the first problem: it can barely go through a regular door like between garage and laundry room. So I had to take alternative route to go through my front door.
Some have asked about the price, the price will be just a tad cheaper than 2x FV18. Building large enclosures and handling them is a bit challenging.
darthray, rossandwendy, jsc79 and 2 others like this.
Last edited by Rythmik; Today at 07:59 AM.'

From the 'horse mouth' himself,not going to be 'cheap' when landed,but most likely this will be the endgame sub for Rythmik ported subs users.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 06, 2019, 09:05
bro, u poisoned BEQ d huh? lol

Go straight with 18' if have the space..... Hoot, clean, nice and detailed with lotsa weight.... the Rythmik G28 dual oppose with servo will be no slouch ...... or wait for the F18 on sales thread  ;D ;D...  :o

As you have experienced also, its not about bringing the building or block down, its the sheer class of tonal balance with details when the subs dig deep enough for the feeling, very immersive with ULF.....

cant wait to check out the G28 myself... hahaha.... ownself poison ownself....

I think I'm going to keep my F18s n add more if 'needed'  ;D ;D ;D. G28 is definitely attractive but in my small room it's not going to be @ it best n imagine lay 2xFV25HP on their side in a small room like my. @ your hall I believe a pair of G28 will be perfect liao.  :D :D
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 06, 2019, 12:11
For Dual FV18 price around $8K+

Let me predict a single FV28 pricing should be around $6.5k-7k range..

Always have a doubt about the paper cone drivers - will it be lasting usage for SG weather?
Cheers.




Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 06, 2019, 13:42
Some updates on Rythmik Audio FV28 Status!!!

The FV28 dimensions are: 23"(W) x 47.25"(H) x 24"(D). Weight is around 265lbs. With four ports open is 12Hz and 3 ports open is close to 9.5Hz. Brian will be taking measurements this weekend but we do have plans to send this prototype to Josh Ricci (Data-Bass) most likely when he resumes measurements next year as we are already entering the cold season up north. The FV28 will have the same amp as the FV25HP (HX2000XLR3) and the driver is the paper cone driver we use on the FV18 paper cone Rev 2. Output wise, the FV28 would have +5dB more output than FV18 and +2dB to +3dB more than FV25HP.

The price would be a tap cheaper than 2 x FV18s.

Here are the real photos taken yesterday by Brian. This is a fully finished FV28 but still is a prototype. It could change a little bit before going into production:

(https://uploads.tapatalk-cdn.com/20191006/d8a4a339f9eff9eafed4ed55ff141c72.jpg)

(https://uploads.tapatalk-cdn.com/20191006/7c1b63805413250227a0eeb24178fea8.jpg)

(https://uploads.tapatalk-cdn.com/20191006/1fe79102a82d5cd942ce11fd6a3db8dc.jpg)

(https://uploads.tapatalk-cdn.com/20191006/190434bc3eaae4a757b84b7ed7eb9abe.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on October 06, 2019, 14:17
Ronildoq, go for FV28 duals or triplets!

Perhaps ported subs may sound different from sealed.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 06, 2019, 14:36
Some updates on Rythmik Audio FV28 Status!!!

The FV28 dimensions are: 23"(W) x 47.25"(H) x 24"(D). Weight is around 265lbs. With four ports open is 12Hz and 3 ports open is close to 9.5Hz. Brian will be taking measurements this weekend but we do have plans to send this prototype to Josh Ricci (Data-Bass) most likely when he resumes measurements next year as we are already entering the cold season up north. The FV28 will have the same amp as the FV25HP (HX2000XLR3) and the driver is the paper cone driver we use on the FV18 paper cone Rev 2. Output wise, the FV28 would have +5dB more output than FV18 and +2dB to +3dB more than FV25HP.

The price would be a tap cheaper than 2 x FV18s.

Here are the real photos taken yesterday by Brian. This is a fully finished FV28 but still is a prototype. It could change a little bit before going into production:

(https://uploads.tapatalk-cdn.com/20191006/d8a4a339f9eff9eafed4ed55ff141c72.jpg)

(https://uploads.tapatalk-cdn.com/20191006/7c1b63805413250227a0eeb24178fea8.jpg)

(https://uploads.tapatalk-cdn.com/20191006/1fe79102a82d5cd942ce11fd6a3db8dc.jpg)

(https://uploads.tapatalk-cdn.com/20191006/190434bc3eaae4a757b84b7ed7eb9abe.jpg)

Wow the fv28 looks muscular ! Must sound and FEEL super good man.

need a very chin chye spouse haha...
Title: Re: Official Rythmik Subwoofer Thread
Post by: desray on October 06, 2019, 14:43
Ronildoq, go for FV28 duals or triplets!

Perhaps ported subs may sound different from sealed.

Which begs the question. Which one is better for HT? Ported or sealed? The latter is widely accepted by most audiophile as the most ideal for music. Porter higher SPL but more noisy (chuffing) compared to sealed ones.


Sent from my iPhone using Tapatalk
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 06, 2019, 15:00
Personally after various experiments , I tend to prefer sealed subs, even for HT, compared to passive radiator or ported subs.

The g28 with its push pull design with servo looks impressive. The main benefits with the sealed design lies in the timing response of the subwoofer together with extension,  with ported subs we will have this timing issues to deal with below port tune

I went with a fully sealed system, including mains and surrounds, all ports sealed , as I found timing to be the holy grail for a good sounding HT system

So given a choice to upgrade, if ever, I’d still go for the g28 ( personal preference )
Title: Re: Official Rythmik Subwoofer Thread
Post by: desray on October 06, 2019, 16:34
Personally after various experiments , I tend to prefer sealed subs, even for HT, compared to passive radiator or ported subs.

The g28 with its push pull design with servo looks impressive. The main benefits with the sealed design lies in the timing response of the subwoofer together with extension,  with ported subs we will have this timing issues to deal with below port tune

I went with a fully sealed system, including mains and surrounds, all ports sealed , as I found timing to be the holy grail for a good sounding HT system

So given a choice to upgrade, if ever, I’d still go for the g28 ( personal preference )

Same as you, I preferred sealed sub.


Sent from my iPhone using Tapatalk
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 15, 2019, 19:19
'The FV28 would be out by the end of 1Q 2020. Brian is still fine tuning it. After a few tweaks and measurements taken this past weekend, port tune is 11Hz with 4 ports open, not 12Hz like I mentioned before.'
According to this post on avsforum,Q1 2020 for FV28,as for the Salk Sound custom built G28,it's canceled due to size too big for that guy space.
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 15, 2019, 23:02
For HT rely lookin forward liao.
 Low tuned Dual 18s Ported for headroom and tactile feel. :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 22, 2019, 18:39
Your order in here , ready to collect.(https://uploads.tapatalk-cdn.com/20191022/7ea44fdf4b8fcf57228acaa8910799b7.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 27, 2019, 09:08
For anyone who's interested there's a new thread @avsforum,the TS directly comparing a JTR Cap4000ulf with a FV25hp in his place @ the same spot with REW measurements on both,the FV25hp give the Cap4000ulf a good run from >15hz up in his place,the below 15hz output partly due to different in port tune frq(10hz vs 12hz),the Cap4000ulf is the current 'king' of ulf for ID sub. Link: https://www.avsforum.com/forum/113-subwoofers-bass-transducers/3098362-comparing-jtr-captivator-4000ulf-rythmik-fv25hp.html
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 27, 2019, 09:20
For anyone who's interested there's a new thread @avsforum,the TS directly comparing a JTR Cap4000ulf with a FV25hp in his place @ the same spot with REW measurements on both,the FV25hp give the Cap4000ulf a good run from >15hz up in his place,the below 15hz output partly due to different in port tune frq(10hz vs 12hz),the Cap4000ulf is the current 'king' of ulf for ID sub. Link: https://www.avsforum.com/forum/113-subwoofers-bass-transducers/3098362-comparing-jtr-captivator-4000ulf-rythmik-fv25hp.html


Nice, see the extension on the ULF on the cap vs the fv25hp

(https://uploads.tapatalk-cdn.com/20191027/b7f4fe599cc628fc09318bb2a8d75d71.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 27, 2019, 09:41
Yes till date the Cap4000ulf is the only ID sub tested n measured @data-bass.com with 100~db output(108db) @10hz. Link to review: https://data-bass.com/#/systems/5c1c0617eae7a300040baca0?_k=pf5a7m
The TS set the rumble filter on the FV25hp to on which roll off additional 18db/octave @12hz aside from the below port tune 24db/octave,it's a good move to protect the FV25hp as this sub not belong to him,he help to store it for another member.



Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 27, 2019, 10:20
Yes till date the Cap4000ulf is the only ID sub tested n measured @data-bass.com with 100~db output(108db) @10hz. Link to review: https://data-bass.com/#/systems/5c1c0617eae7a300040baca0?_k=pf5a7m
The TS set the rumble filter on the FV25hp to on which roll off additional 18db/octave @12hz aside from the below port tune 24db/octave,it's a good move to protect the FV25hp as this sub not belong to him,he help to store it for another member.

I see, responsible chap! I would switch off the rumble filter if actually playing with it. But nowadays it’s safe, don’t really need rumble filter , all the movies cut off <30hz... nothing below that, all filtered by sound mix Engineers... don’t even need ulf subs... lol

Unless we have BEQ, we probably only need a sub that can handle down to 20hz, that would suffice actually
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on October 27, 2019, 11:47
Both FV25HP and Cap-4000ULF are very respectable subs. Powerhouses.

In our Singapore HT context, I would choose the FV25HP over the JTR Caps for many practical reasons.

Size - Did you know the JTR4000 footprint is twice that of the FV25HP? Imagine having a sub with a 1mx1m footprint.

Service & support - Did you know SG offers after sales support?

SPL - IMO, no need for more than 115dB at 12Hz. If you listen to 20dB below Reference levels, the loudest possible bass is only going to be about 105dB.

WAF - Good luck going by pics...

Circuit Breakers - If you really listen to levels that need full output from the sub,you will need 20A circuit breakers for 1 sub. IF you are serious about HT, you will know you'll need 2 subs. 40A circuit breakers.....

There are many other technical reasons  beyond the scope of this thread....

 
 
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 27, 2019, 12:25
Have to agree that FV25hp is more suitable for SGP ht uses,other than size,finishing n spl another factor to consider is to what I read on avsforum JTR ported subs needs bigger space to shines n perform @ its best,few reported that the Cap2400ulf (Cap4000ulf smaller 'brother' singler 18" woofer with 2.4kw amp) ulf sound was overwhelming in smaller space n don't sounds good,for big ht space no such problem.
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 27, 2019, 14:48
It's always the big guys on Rythmik, JTR and PSA.
https://www.avsforum.com/forum/113-subwoofers-bass-transducers/3096120-fv25-vs-v3611-vs-jtr-cap2400.html
Personal preference for me is Rythmik - Punchy, clean and Powerful, all I need for HT.

Most claim JTR can run deep and violent - think it's need big space to perform.
Wonder if ever there is any local dealer carry JTR?


Title: Official Rythmik Subwoofer Thread
Post by: econav on October 27, 2019, 14:57
yes, there are , if you want to listen .
they dont look good for the eyes , most are hiden behide , they do sound real raw and need a good trainer , space is what need most, to house it and its power . you cant even move this into a lift i think .

there are few user of JTR smaller Sub and horn spk i know in Xp .
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on October 27, 2019, 17:18
From what i read on the US forums, JTR brought many smiles to US HT lovers. And vfm too.

But IMO, in SG where houses have a smaller average cubic space which translates into much smaller listening rooms compared to ang mo countries, with the exception of landed properties, probably the FV25 and F18 would be more than suffice and more fitting because of limited floor space.

Can't imagine having a sub that's SOO BIG in the house. Will kenna thrown out of the house lol and maybe banned from having HT in the den  ;D

Service & support - Did you know SG offers after sales support?

And +1 that there is local agent. An impt factor to consider :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 28, 2019, 08:18
https://www.avsforum.com/forum/113-subwoofers-bass-transducers/3098362-comparing-jtr-captivator-4000ulf-rythmik-fv25hp.html
This thread is getting interesting! A pair of Seaton F18+ was added! Only the 'angmo' can make this happened.;D Listening impression coming next.
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 29, 2019, 21:04
Seem like the listener is impressed by the seaton F18i Combo.
Solid subs there)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 30, 2019, 08:34
Haha,not surprisingly @ all,as the Seaton F18+ master/slave pair is a great sounding sub with outstanding ulf capability.
One has to get used to the Rythmik sub sounds signatures otherwise u won't appreciate it. This happened when i bought the f12 based on a friend recommendation 7~8 yrs ago,after setting up the sub i was like wtf how come a 12" sub sounds like this so lean sounding but less than 3 weeks later i bought another 1 as i discovered this sound signature is what i preferred and now i end up with the F18s. They're lean/'fast'/tight won't causes unnecessarily attention to themselves as 1 of the poster said n perhaps too 'clean' to some which feels no 'kick'.😅
Another thing is the FV25hp with dual 15" woofer only n half the power of the Seaton n JTR actually do quite well liao.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 30, 2019, 08:57
Haha,not surprisingly @ all,as the Seaton F18+ master/slave pair is a great sounding sub with outstanding ulf capability.
One has to get used to the Rythmik sub sounds signatures otherwise u won't appreciate it. This happened when i bought the f12 based on a friend recommendation 7~8 yrs ago,after setting up the sub i was like wtf how come a 12" sub sounds like this so lean sounding but less than 3 weeks later i bought another 1 as i discovered this sound signature is what i preferred and now i end up with the F18s. They're lean/'fast'/tight won't causes unnecessarily attention to themselves as 1 of the poster said n perhaps too 'clean' to some which feels no 'kick'.😅
Another thing is the FV25hp with dual 15" woofer only n half the power of the Seaton n JTR actually do quite well liao.

This guy only used 4 clicks and they are already loving the seatons, when pushed the LF to 7 clicks, the goosebumps are ever present . That’s what made me buy the seatons back then when I experienced it at one of the members place while doing the eq for this set up

A lot of the seaton magic lies in the amplifiers, not just the Drivers , driver is only 1/4 the story
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 30, 2019, 09:07
Interesting to know Marc’s thoughts  on disconnecting servo when playback, the servo seems to be limiting driver excursion ? That makes it sound clean, thin and lean ?

I noticed the same effect when I demoed your F18, but that’s before the full EQ. Need to pop by again to confirm . It’s quite different feeling the ulf from the seatons f18 vs The rythmik f18

I reckon a dual rythmik f18 for comparison would be a better choice in that room, then we have all 18” Drivers sealed in that room
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 30, 2019, 19:42
Interesting to know Marc’s thoughts  on disconnecting servo when playback, the servo seems to be limiting driver excursion ? That makes it sound clean, thin and lean ?

I noticed the same effect when I demoed your F18, but that’s before the full EQ. Need to pop by again to confirm . It’s quite different feeling the ulf from the seatons f18 vs The rythmik f18

I reckon a dual rythmik f18 for comparison would be a better choice in that room, then we have all 18” Drivers sealed in that room

Sure bro anytime,this time should be able to give u a 'proper' demo as last few rounds mainly focus on tuning the system.
As for the sound signature of Seaton F18+ pair i borrow this from that thread TS:
'We were expecting the sound signature to go back to 'sealed like' when we switched over to the Seaton F18 combo (LF Adjust @ 4/10). That didn't happen. The Seaton F18+ combo and the Cap 4000ULF sounded more similar than different. It also had a fuller sound and the presence. In fact, if not for the 4000ULF's port wind, we might not have been able to tell them apart. I was very impressed with the Seaton F18+ combo. I think bulls was happier because he has the Seaton F18+ combo and the Cap 1400 in his HT.'
This was similar to my thought as well after demoed your system when u done all the EQ/fine tune,the 2 pairs of Seaton F18s got a fuller/thicker sound signature,the ulf presentation were more 'voilent' compared to the Rythmik F18s i owned.
Looking forward to your visit. :D
Title: Official Rythmik Subwoofer Thread
Post by: Tiktokape on October 30, 2019, 19:48
This was similar to my thought as well after demoed your system when u done all the EQ/fine tune,the 2 pairs of Seaton F18s got a fuller/thicker sound signature,the ulf presentation is more 'voilent' compared to the Rythmik F18s i owned.
F18 is more polite? Have you compared between F18 vs FV25HP in term of politeness?


Sent from my iPhone using Tapatalk
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 30, 2019, 19:51
F18 is more polite? Have you compared between F18 vs FV25HP in term of politeness?


Sent from my iPhone using Tapatalk

I'm more a sealed sub guy,never heard the FV25hp in person so can't comment on it.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on October 30, 2019, 19:58
I'm more a sealed sub guy,never heard the FV25hp in person so can't comment on it.
No problem, I’m also sealed subwoofer guy. I have not heard F18 before so I’m curious over your comment re Seaton is more violent


Sent from my iPhone using Tapatalk
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 30, 2019, 21:48
For me using FV18 as compared to FV25 ( Heard at Jag place )

FV25 have the Power and deep clean bass.
Both FV18 & FV25 gun shots machinery scene can release the punchy TR shiokness.
Instruments playback are impactful.

Cheers Enjoy the bass. 
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on October 31, 2019, 00:01
I would like to listen to ronildoq system. But he has got soooo many people in the queue that I’m gonna have to wait till next year to reach my turn.

I might be able to form a good comparison since I’ve been using BEQ for a Long time to spot differences easily.

Ronildoq, got a slot for me?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 31, 2019, 07:42
No problem, I’m also sealed subwoofer guy. I have not heard F18 before so I’m curious over your comment re Seaton is more violent


Sen :Dt from my iPhone using Tapatalk

Haha,same same,if u're interested to have a listen can pm to arrange.😄
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on October 31, 2019, 08:15
'Anyways, I own a FV25HP, and while I really really really like it, it's almost too articulate and smooth for my tastes which is why I'm moving up to one of PSA's offerings, but it sounds like you would love that tight accurate, clean, bass of what Rythmik or any of these other companies has to offer. Good luck!'

This quote is from another avsforum thread,as u can see Rythmik sub is not everyone cup of tea,everyone got different preferences. Rythmik sub are known to be SQ first output 2nd.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 31, 2019, 08:17
I would like to listen to ronildoq system. But he has got soooo many people in the queue that I’m gonna have to wait till next year to reach my turn.

I might be able to form a good comparison since I’ve been using BEQ for a Long time to spot differences easily.

Ronildoq, got a slot for me?

Yes yes bro, paiseh. So full all the way till December. As soon as I get an available slot I’ll pm u, no worries, need to catch up too after a Long time . I’d prefer to have 1 to 1 session with u. I’m still waiting for the perfect opportunity, will get in touch
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 31, 2019, 09:11
Sure bro anytime,this time should be able to give u a 'proper' demo as last few rounds mainly focus on tuning the system.
As for the sound signature of Seaton F18+ pair i borrow this from that thread TS:
'We were expecting the sound signature to go back to 'sealed like' when we switched over to the Seaton F18 combo (LF Adjust @ 4/10). That didn't happen. The Seaton F18+ combo and the Cap 4000ULF sounded more similar than different. It also had a fuller sound and the presence. In fact, if not for the 4000ULF's port wind, we might not have been able to tell them apart. I was very impressed with the Seaton F18+ combo. I think bulls was happier because he has the Seaton F18+ combo and the Cap 1400 in his HT.'
This was similar to my thought as well after demoed your system when u done all the EQ/fine tune,the 2 pairs of Seaton F18s got a fuller/thicker sound signature,the ulf presentation were more 'voilent' compared to the Rythmik F18s i owned.
Looking forward to your visit. :D

I think that beginning bomber scene unbroken using BEQ, we can tell easily the sound characteristics between the rythmik vs seaton. I suspect mainly due to the amplifier and servo. Next we can compare psa v1811, too bad not many jtr 4000 users here

On a separate note, I noticed that all the diy subs using crown amplifier had more or less the same sound signature. So I’m guessing a lot of the sound signature from the subs has to do with the amplifier of choice

 Maybe for tactile feedback the Drivers play a different role, but as far as sound signature goes, they sound quite similar

Anyway, nice to see feedbacks from users on avs, I enjoy reading these type of reviews and comparisons vs those from the magazine
Title: Re: Official Rythmik Subwoofer Thread
Post by: Tiktokape on October 31, 2019, 12:30
Haha,same same,if u're interested to have a listen can pm to arrange.
Thanks for the invite, will get in touch with you soon.


Sent from my iPhone using Tapatalk
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on October 31, 2019, 12:53
Yes yes bro, paiseh. So full all the way till December. As soon as I get an available slot I’ll pm u, no worries, need to catch up too after a Long time . I’d prefer to have 1 to 1 session with u. I’m still waiting for the perfect opportunity, will get in touch

Definitely.  I will be able to spot differences between FV25HP and F18s.

Who knows I might switch over to seatons after that.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 31, 2019, 15:45
Definitely.  I will be able to spot differences between FV25HP and F18s.

Who knows I might switch over to seatons after that.

honestly i wouldnt recommend the seatons in Singapore, my personal experience. Not because the subs are not good, but a bit worried as we dont have local support. Last round i had this air leak issue, turns out it was leaking through the footers, i unscrew the footers to stack the subs, then noticed both subs sitting on top having air leak. prior to that, Mark was about to send me the replacement drivers, and guide me with assembly (after i have sent him the video of the air leak), he promised to send me the replacement driver, but false promises. the wait, lasted like from 2 weeks, to 1 month to 3 months. in the end i gave up. Luckily bro synthesis popped by, and he fixed the issue. he was my saviour!! Thanks Synthesis again! so we affixed the original footers, and voila, it was working like a charm again. it was a scary experience with no local support. As you have rightfully pointed out above, local support is important. Lotsa stories in AVS, another guy in australia was like waiting for his replacement amp for more than a year or so.... quite scary really, as we are not in USA, we dont get the customer service priority like those who reside there

Anyway, the ULF weight on the seatons are fantastic with BEQ turned on.different beast when its playing down to infrasonics. never really fully realised the potential of the seatons until i started BEQ. The shootout done by the guys in AVS is good thread
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 31, 2019, 15:57
if we can have our own singapore shootout will be nice...

Dual Seaton F18
Dual Rythmik F18
Dual PSA 18
Dual JTR 18
Dual DIY 18'

Then its game on shootout session!! Bring it on session.... (with BEQ of course)
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 31, 2019, 16:07
if we can have our own singapore shootout will be nice...

Dual Seaton F18
Dual Rythmik F18
Dual PSA 18
Dual JTR 18
Dual DIY 18'

Then its game on shootout session!! Bring it on session.... (with BEQ of course)

V good signature test
Will be good for consumers to know which to buy what they like best. :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 31, 2019, 18:12
if we can have our own singapore shootout will be nice...

Dual Seaton F18
Dual Rythmik F18
Dual PSA 18
Dual JTR 18
Dual DIY 18'

Then its game on shootout session!! Bring it on session.... (with BEQ of course)

This can be arrange.....
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on October 31, 2019, 18:33
This can be arrange.....

That will be nice, I’ll gladly volunteer to put the seatons up for the shootout

Anyone else interested? Maybe we can organise and schedule for year 2020  for the shootout

Do u know anyone who owns the JTR captivator? Then it will be complete
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on October 31, 2019, 20:13

More more.
The new Captivator RS1   ::)& Captivator 4000ULF-TL (tall)
@ https://www.facebook.com/JTR-Speakers-305310779622400/?ref=page_internal
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 31, 2019, 20:21
That will be nice, I’ll gladly volunteer to put the seatons up for the shootout
Use your room ?
Do u know anyone who owns the JTR captivator? Then it will be complete
4000lp and some 210
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on October 31, 2019, 20:22
More more.
The new Captivator RS1   ::)& Captivator 4000ULF-TL (tall)
@ https://www.facebook.com/JTR-Speakers-305310779622400/?ref=page_internal

RS1 should be here for Xmas....
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on November 01, 2019, 07:55


My place is ok, your place also ok ! Can have all the competitor sub at the corner location for the ULF

Maybe 9th Feb 2020 get together session , Sunday

But I’ll need to get Mrs approval if it’s my place. But should be ok. We get the goods ready. So seatons will already be there if at my place

So what we will need is the

Rythmik - econav
Seatons - Ronildoq
Psa - ? Win win ?
JTR - ?
DIY ? Kenny ? Wechnivag?

After this we will all know the sound signature of each sub brand
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on November 01, 2019, 08:47
if we can have our own singapore shootout will be nice...

Dual Seaton F18
Dual Rythmik F18
Dual PSA 18
Dual JTR 18
Dual DIY 18'

Then its game on shootout session!! Bring it on session.... (with BEQ of course)

This sounds exciting ;D

I think we should include the FV25 hehe
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 01, 2019, 10:53
This sounds exciting ;D

I think we should include the FV25 hehe

include a pair of FV25Hp ? i dont think any normal hall can house 10 18” sub   yet still hv space for seating and further more if all sub are in the same location they will inter-act with each driver and no good for calibration and sound .
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 01, 2019, 10:55
My place is ok, your place also ok ! Can have all the competitor sub at the corner location for the ULF

Maybe 9th Feb 2020 get together session , Sunday

But I’ll need to get Mrs approval if it’s my place. But should be ok. We get the goods ready. So seatons will already be there if at my place

So what we will need is the

Rythmik - econav
Seatons - Ronildoq
Psa - ? Win win ?
JTR - ?
DIY ? Kenny ? Wechnivag?

After this we will all know the sound signature of each sub brand
Think use JTR RS 1 for this sealed shoot out will be better ....
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on November 01, 2019, 12:22
include a pair of FV25Hp ? i dont think any normal hall can house 10 18” sub   yet still hv space for seating and further more if all sub are in the same location they will inter-act with each driver and no good for calibration and sound .

Too many will spoil it, I agree with u. Keep it simple, with all 18” sealed. Single is fine

Purpose we wanna get a feel of the “house signature” from each brand, what type of sonic characteristics down Low frequency or even lower midbass, type of weight and impact, from then on we can form an opinion

I reckon we focus on content 8-40hz type, with BEQ, this will be the perfect shootout
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on November 02, 2019, 10:09
Those subs are gong to sounds differently for sure as each has their own sound signature,further 'proven' by a guy which is well known on avsforum: Marc Alexander,quote from him @that thread today as he visited the TS:

'Subwoofer signature has been of interest since I hosted a GTG in early 2017. At that time, tactile feel was the focus. Sound signature was not a consideration. At that time I assumed that a subwoofer's sound signature was a function of its amplitude response and distortion profile. However, there seems to be more to it.
I was never aware of any obvious differences in sound signatures between subs before distortion began to rise. I like to listen to burst tones in room before demo tracks as they are much safer than continuous tones (very good for finding and fixing sympatheric vibration noises). In the past I compared the PSA S3000i vs Seaton Submersive HP & F18+ and they all sounded identical at moderate levels. I also compared the Rythmik FV15HP and Monolith 15 which performed quite closely. When I compared the Rythmik FV18, JTR Cap1400 (2015) & Cap118 (2017) the focus was on decay and tactile feel.
Reading reports of a "tonal" difference with the Audyssey burst tones surprised me. I paid @chucky7 a visit Wednesday to investigate. There were indeed noticeable differences in both sound signature and tactile feel. We both percieved that the JTR dug deeper (I was using tones between 20-50Hz). However, the microphone was not revealing any significant differences. This was surprising. Vibsensor results also didn't directly correspond to the differences in tactile feel we both experienced (concrete slab). I do have an RPI but I have yet to try the new version of Viberry.
Differences were noticeable during the Audyssey bursts, REW generated tones, and demo clips of well known scenes. I expected the differences to disappear with continuous tones but they did not. I'm beginning to suspect the room(s). I have always felt that the JTRs energized a space more effectively than comparable Rythmiks. @imureh 's experienced with the JTRs seem to show that there can be too much energy.
I'm going to fire up my FV18 and Cap2400ULF and see if I percieve the same tonal difference in my large space. Then I can move them into a smaller space and observe.
More dedicated analysis and further testing will be necessary to fully unravel the why's of this. I have access to everything needed [except time] to investigate further. I just have other priorities that take precedence.'

Can see that even the test tone from avr/avp also sounds differently.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on November 02, 2019, 11:07
Yes, that is why we are organising the shootout. ULF feeling is different with different subs, the focus is on the “house signature”

Exactly my findings with DIY subs...  the spec is only one side of the story, the amplifier other, the driver other, box size, material, etc, but when it comes to actual listening, that sound and feel is very different

I have a lot of respect for Marc, a lot of my findings concur to his observations, and he is very impartial , even on the lyngdorf thread, very experienced guy indeed. I like to read his comments and hear his thoughts on avs
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on November 02, 2019, 12:40
Those subs are gong to sounds differently for sure as each has their own sound signature,further 'proven' by a guy which is well known on avsforum: Marc Alexander,quote from him @that thread today as he visited the TS:



'Subwoofer signature has been of interest since I hosted a GTG in early 2017. At that time, tactile feel was the focus. Sound signature was not a consideration. At that time I assumed that a subwoofer's sound signature was a function of its amplitude response and distortion profile. However, there seems to be more to it.
I was never aware of any obvious differences in sound signatures between subs before distortion began to rise. I like to listen to burst tones in room before demo tracks as they are much safer than continuous tones (very good for finding and fixing sympatheric vibration noises). In the past I compared the PSA S3000i vs Seaton Submersive HP & F18+ and they all sounded identical at moderate levels. I also compared the Rythmik FV15HP and Monolith 15 which performed quite closely. When I compared the Rythmik FV18, JTR Cap1400 (2015) & Cap118 (2017) the focus was on decay and tactile feel.
Reading reports of a "tonal" difference with the Audyssey burst tones surprised me. I paid @chucky7 a visit Wednesday to investigate. There were indeed noticeable differences in both sound signature and tactile feel. We both percieved that the JTR dug deeper (I was using tones between 20-50Hz). However, the microphone was not revealing any significant differences. This was surprising. Vibsensor results also didn't directly correspond to the differences in tactile feel we both experienced (concrete slab). I do have an RPI but I have yet to try the new version of Viberry.
Differences were noticeable during the Audyssey bursts, REW generated tones, and demo clips of well known scenes. I expected the differences to disappear with continuous tones but they did not. I'm beginning to suspect the room(s). I have always felt that the JTRs energized a space more effectively than comparable Rythmiks. @imureh 's experienced with the JTRs seem to show that there can be too much energy.
I'm going to fire up my FV18 and Cap2400ULF and see if I percieve the same tonal difference in my large space. Then I can move them into a smaller space and observe.
More dedicated analysis and further testing will be necessary to fully unravel the why's of this. I have access to everything needed [except time] to investigate further. I just have other priorities that take precedence.'

Can see that even the test tone from avr/avp also sounds differently.

Nice sharing bros,  passion driven bros in the HT scene.
I think in the market trend now there basically 2 groups of consumers.
Regardless of brands. Below are some suggested factors.
Do consider the resale value factor if you buy, use and sell forget type. :)

First time sub buyer
1.Price
2.Performance\Size\Looks (WAF)
3. Sound Signature

Experienced subs buyer
1. Quantity
2. Sound Signature
3. ULF, TR ,tactile feel
4. Lastly Price lol..

Just my inputs as above. :)

Am excited to feel how the JTR, Seatons and lastly the " DIY Sub" signature perform in the same room.
Always a DIY guy in the PC era but not DIY subs.
Maybe 1 day will switch to "DIY" subs ? :)

PS : Maybe Peng can remain that front stack of "bonus" KK DXD 1K in the room for bros to feel ...
Never forget that intensified "air drift" pressure mid bass. Awesome :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 02, 2019, 14:26
All along i have say every sub sounded dif and feel is very dif and that is what application is all abt.

18” , we have lot of headroom to play with under home setting, this round i will like to showcase each of their signature then loudness and let all to understand what actual sound good and feel good for them , there should not be any winner or so , just which suit your taste and need .

Is not just pure SPL and how linear the grap is , but how the velocity in a given room and how the air was be pressure , lot of time is actually too much un-control low spoli the show , unbalance phase build up ring.

For Rythmik and KK ( comsumer range ) are for home use . We use the JTR mainly for our custom install need , as look is not the consent in install market , but price vs performance is .
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on November 02, 2019, 14:36

PS : Maybe Peng can remain that front stack of "bonus" KK DXD 1K in the room for bros to feel ...
Never forget that intensified "air drift" pressure mid bass. Awesome :)
[/quote]

The setup in the Test room , is going to change to a 150-170  60% reflection and 40% transmition and house a 20 channel setting with Nxxx projection , coming Jan .
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on November 02, 2019, 19:06
All along i have say every sub sounded dif and feel is very dif and that is what application is all abt.

18” , we have lot of headroom to play with under home setting, this round i will like to showcase each of their signature then loudness and let all to understand what actual sound good and feel good for them , there should not be any winner or so , just which suit your taste and need .

Is not just pure SPL and how linear the grap is , but how the velocity in a given room and how the air was be pressure , lot of time is actually too much un-control low spoli the show , unbalance phase build up ring.

For Rythmik and KK ( comsumer range ) are for home use . We use the JTR mainly for our custom install need , as look is not the consent in install market , but price vs performance is .

+1 well said. Everyone preference sub is a 'winner' as so there're different brand subs with different sound signature to suit individual taste.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on November 03, 2019, 10:41
Well mentioned points guys, there is no one winner and it’s definitely not a race for the best SPLs producing subs. Everyone’s taste will be different, even levels for individual will be different. Some listen at -5, some listen at -20 to be comfortable

I think it’s more on the sound signature, and the feeling of what each sub is capable of. It’s nice to have comments from individuals who have actually heard it. We get an overall idea. But it’s never the same with actually listening and experiencing it. That’s where we grow in experience on what is possible what not and form our opinion and taste for certain stuff
Title: Re: Official Rythmik Subwoofer Thread
Post by: SiaOLiaO on November 12, 2019, 22:15
Would love to join the shootout too. Just upgraded to a single F18. So happy with the sound. Turns out I really like sealed better than ported.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on November 13, 2019, 19:23

Would love to join the shootout too. Just upgraded to a single F18. So happy with the sound. Turns out I really like sealed better than ported.

Nice! Straight jump to 18". If fund/space allow consider add a 2nd 1 in future.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on November 14, 2019, 09:21
Would love to join the shootout too. Just upgraded to a single F18. So happy with the sound. Turns out I really like sealed better than ported.

congrats! sometimes it requires time, to understand what you really like. And this liking, will also change over time. Some went from sealed to ported and vice versa.

End of the day, remember to enjoy!! Im sure you will be very pleased with the F18, music will also sound different with the F18, that weight down lower freq will add something into the mix... "feeling".... Good choice really!!
Title: Re: Official Rythmik Subwoofer Thread
Post by: SiaOLiaO on November 14, 2019, 13:43
Nice! Straight jump to 18". If fund/space allow consider add a 2nd 1 in future.

Thanks! Actually I did play with 1xLVX12 + KK808 before, did not had the time to properly calibrate it with REW then sold the 808 away.
Whilst I was really wanting the mid bass kick, I felt the need to pursue deeper bass, which was the reason why I went straight to 18".
Of course, the space was a big consideration. The footprint for F18 was just slightly larger than LVX12, which was very important as my room is puny..
Title: Re: Official Rythmik Subwoofer Thread
Post by: SiaOLiaO on November 14, 2019, 13:47
Yeah I do agree our taste do change. Maybe I haven grown tired with ported sound cos throughout my HT journey, my subs were all ported..  ;D ;D ;D
One point to notice though, although I feel ported is loud, I feel the rumbling sensation is enhanced with the sealed subs, which was what I was looking for. Noticed it in other demo showrooms as well. Not sure if it is just me.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on November 14, 2019, 20:12
Thanks! Actually I did play with 1xLVX12 + KK808 before, did not had the time to properly calibrate it with REW then sold the 808 away.
Whilst I was really wanting the mid bass kick, I felt the need to pursue deeper bass, which was the reason why I went straight to 18".
Of course, the space was a big consideration. The footprint for F18 was just slightly larger than LVX12, which was very important as my room is puny..

No choice 1 as living space is getting smaller n smaller nowadays,but after sometime the F18 will become 'smaller' also. ;D ;D ;D
After dial in the sub can start to explore BEQ as well to enhance movie watching enjoyment with restored ulf. Info can be found @ post 3 n 4 of this avsforum thread: https://www.avsforum.com/forum/113-subwoofers-bass-transducers/2995212-bass-eq-filtered-movies.html
Title: Re: Official Rythmik Subwoofer Thread
Post by: SiaOLiaO on November 15, 2019, 11:25
No choice 1 as living space is getting smaller n smaller nowadays,but after sometime the F18 will become 'smaller' also. ;D ;D ;D
After dial in the sub can start to explore BEQ as well to enhance movie watching enjoyment with restored ulf. Info can be found @ post 3 n 4 of this avsforum thread: https://www.avsforum.com/forum/113-subwoofers-bass-transducers/2995212-bass-eq-filtered-movies.html
No choice 1 as living space is getting smaller n smaller nowadays,but after sometime the F18 will become 'smaller' also. ;D ;D ;D
After dial in the sub can start to explore BEQ as well to enhance movie watching enjoyment with restored ulf. Info can be found @ post 3 n 4 of this avsforum thread: https://www.avsforum.com/forum/113-subwoofers-bass-transducers/2995212-bass-eq-filtered-movies.html

Ya lor, exactly. I hope the F18 don't shrink on me too soon if not upgraditis will set in. ;D
Wah this BEQ is complicated sia.. I thought calibrating the room is difficult, this requires ripping of movies to the PC.. bleah.. no time ahhh..
But thanks for sharing! It is interesting to know that the lost bass can be retrieved and knowing me, I would certainly be tempted if I hear a setup with BEQ.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on November 15, 2019, 12:08
Ya lor, exactly. I hope the F18 don't shrink on me too soon if not upgraditis will set in. ;D
Wah this BEQ is complicated sia.. I thought calibrating the room is difficult, this requires ripping of movies to the PC.. bleah.. no time ahhh..
But thanks for sharing! It is interesting to know that the lost bass can be retrieved and knowing me, I would certainly be tempted if I hear a setup with BEQ.

not really complicated, u need a minidsp 2x4hd, then use BEQ designer, load in the configuration each time before u watch a movie. thats it. done.....

https://www.avforums.com/threads/making-movies-sound-better-with-bass-eq.2212871/

read this instead, straight to the point., the AVS one is much more detailed, but its essentially the same thing,just more info. Read the AV forum one, straight to the point., for choice, use the BEQ designer app, plug in, load the filters, sit back and enjoy!!
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on November 15, 2019, 14:36
Ya lor, exactly. I hope the F18 don't shrink on me too soon if not upgraditis will set in. ;D
Wah this BEQ is complicated sia.. I thought calibrating the room is difficult, this requires ripping of movies to the PC.. bleah.. no time ahhh..
But thanks for sharing! It is interesting to know that the lost bass can be retrieved and knowing me, I would certainly be tempted if I hear a setup with BEQ.

As bro ronildoq said BEQ is not so complicated n don't need to rip your bd/uhd also. I'm happy to host u for a demo on BEQ,pm me to arrange if u're interested. In a good way BEQ had changed my movie watching experience. 😄
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on November 17, 2019, 10:40
Bass Myths
May 1, 2019
Josh

Introduction
The following list represents commonly held myths about bass, subwoofers and sound in general. The list by no means covers all of the myths that have accumulated over the decades, there are too many to list them all here, but many of the most prevalent and persistent ones are covered. It is hoped that by briefly explaining the faults underlying these myths, we will help to keep them from spreading further.

Simple answers to complex questions
There are no simple answers to complex questions. Especially when there are many interlinked variables as is true for audio systems. Audio involves interconnected behaviors in the acoustic, electric and mechanical domains. Nothing happens in a vacuum. Everything is a trade-off of some sort. Every change has interrelated effects further down the line. It would be nice if things were as simple as we want them to be, but they never really are.

Xmax Myths
Higher Xmax Rating = More SPL Capability

In theory this statement is true. In practice it is not that simple. So yes, more xmax does mean more SPL, but only for very low frequencies where driver excursion is the limitation on output. There are generally 3 limitations on output. Driver excursion, driver power handling and the amplifier. Which of these limitations caps the output varies depending on the particular sub design and the frequency bandwidth. Excursion limitations occur in the deep bass frequencies. The amplifier would typically set the limits in the design at a point that makes use of the drivers useful excursion capabilities in the deep bass. Typically the amplifier will run out of capability in the upper bass range long before the driver runs out of excursion. The amount of "amplifier" required to push a driver to 25mm one way excursion at 50Hz, even in free air is immense.
Sub drivers can really be broken down in two categories: Mass controlled drivers and compliance controlled drivers. Mass controlled tends have lower Xmax and higher efficiency. These tend to be punchy and very loud and mostly used in live concerts for sound reinforcement, or even car SPL competitions. Compliance controlled subs, which tend to be the majority of home and car audio subs, have higher xmax, more moving mass, lower efficiency, but more SPL capability in the lower frequency spectrum due to higher displacement potential. A driver from either end of these categories can perform well, but it largely depends on the required bandwidth and application. Using a low xmax pro-woofer for high level <30Hz playback is probably not ideal. It does not have the Xmax to move the required amount of air for high SPL in that frequency bandwidth. Likewise using a high Xmax, low efficiency driver for a sound reinforcement application where the playback is primarily really loud >40Hz bass is also not going to be very effective. Despite having much higher Xmax, it is not needed and unused in that type of application. Designing a driver for extremely large Xmax typically incurs increases in voice coil inductance, moving mass, larger gap tolerances, which decrease motor force on the coil and stiffer heavier suspension components. That type of driver will usually have less output over a large portion of the upper bass bandwidth vs a shorter Xmax more efficient driver. As a rule of thumb...The deeper in frequency that the sub design will be operating, the greater the emphasis that should be placed on a large Xmax.

All Xmax ratings are created equal

Xmax is a complicated subject. In an ideal scenario a consumer could compare the rating from 2 different brands and assume that they were directly comparable. Unfortunately it is not that simple. Xmax is generally understood to be the one-way excursion that the driver can produce while still being relatively clean. The way that Xmax is rated is all over the map. The most reliable ratings are those derived from Klippel testing or from the gap specs.
Klippel testing sets limitations on the variation in the motor force (BL), suspension compliance (Kms) and inductance (Le) as measured from the driver. However even this has been shown to have some variation in the reporting of results from different manufacturers. Some may only use the BL curve, others may use BL and Kms and another may use all 3 parameters for defining Xmax (Using all 3 criteria for defining Xmax is extremely stringent and a driver that exceeds even 20mm one way using this method is a very rare thing).

Gap and coil specs do not give any insight into the performance of the suspension components, or the inductance variation of the coil and motor system, but they are hard data points that can be used to get a pretty good guess at the useful Xmax barring any truly bad inductance, or suspension issues. Even with gap and coil specs provided, the way that manufacturers spec the Xmax varies. Some use a simple equation of coil wind height, minus the gap height, divided by 2. This gives the mathematical coil overhang. Some manufacturers add an additional 1/4 of the gap height back in for the Xmax rating, others add 1/3 of the gap or even 1/2. This makes it hard to truly compare these without using the same calculation across all of the drivers.

Sometimes Xmax is rated as the excursion level at which the driver is producing 10% distortion, but typically this is at resonance which is a best case scenario for the driver, or the manner in which this is measured and at what frequency with what cabinet loading the driver is completely unknown.

Then there are the driver manufacturers who provide no information at all about how the Xmax is rated. It could be any of the above methods or something else entirely or nothing at all. Some companies seem to make up a rating out of this air. The worst of all are the companies that give no information about how their Xmax rating is derived and they market the product using a peak to peak rating which makes the excursion potential seem huge to consumers who do not know any better. Do not assume that mfg A's 30mm Xmax rating is equivalent or directly comparable to mfg B's 30mm Xmax rating. You may be comparing apples and oranges.


Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on November 17, 2019, 10:42
Power Myths
More Power = More SPL

This one is very common especially in the car audio scene where customers will ask "How many watts is it?" when evaluating a sub or amp. The assumption is that the sub with the higher power rating will be louder. This cannot be determined by something like a power handling rating since it depends on so many factors including: The efficiency and sensitivity of the driver, its linearity at high output, the cabinet it is loaded into, the signal it is reproducing, the capabilities of the amplifier driving it and its power handling and compression.
Power Handling

Most would assume that the "rms" or "continuous" power rating of a speaker means that it could never be damaged by this amount of power or less and will be "safe" under any circumstances as long as the rated amount of power is not exceeded. False. The truth is that even a relatively small amount of continuous or average power applied at a worst case frequency will eventually exceed the cooling ability of the voice coil. You see plenty of big subs rated at over 1000 watts these days. This is not truly a continuous power rating. Remember most subs are < 1% efficient meaning that 99% of the power applied to the coil is turned into heat. A voice coil that can survive dissipating 990 watts of heat buildup over a long period is going to be very rare indeed. Duration of the signal is key. Most subs will handle many times more than their power rating for a brief moment such as a kick drum hit. That same amount of power applied for 30sec continuously could burn the coil out easily. What the manufacturers typically mean when they specify a power handling figure is: When used with appropriate filtering, in a suitable cabinet, with typical music content / crest factor and an amplifier of the specified power rating. This is a far far cry from a true 100% duty cycle signal applied at a frequency which causes minimum cooling of the coil. Most music approximates 1/8th to 1/4 duty cycle at worst. What this means is that when you are playing your sub and the 1000w rated amplifier is at clipping this does not mean that the sub is getting "1000 watts" It might be on certain peaks, but the average power as the music signal varies is far lower and this must be considered against the impedance vs frequency of the sub as well. Maximum power is only applied into the frequencies with the lowest impedances. In this typical scenario the true average power is more likely to be <200 watts.
To complicate things even further the way power ratings are specified is all over the map depending on which manufacturer it is. The better ones use AES, Klippel, or CEA-2031 developed ratings. Some of them appear to pull a number out of thin air.

Big Subs need Bigger Amps

This is another widespread myth. The fact is that bigger subs will often be more efficient, more sensitive and have higher power handling and total displacement. Larger drivers with more cone area will usually improve efficiency and sensitivity. A bigger or more powerful motor system will often result in increases as well. A larger cabinet gives more airspace for the drivers to work in which increases low end efficiency and sensitivity also. Bigger drivers with more cone area, power handling and xmax can have better linearity and less output compression. All of this adds up to more output from a fixed amount of power. It may be true that a larger amp is needed to push the bigger more powerful subs to their maximum output potential, but in a lot of cases a bigger sub will also produce more output than a lesser/smaller sub with equivalent power. The bigger sub actually needs less amplifier to produce the same output as a smaller sub in many cases.
With the way that power increases translate into SPL, system efficiency becomes very important for things like professional sound reinforcement and car audio SPL competitions. A doubling of power only translates into a 3dB increase in SPL IF the speaker system is not compressing, which would result in a less than 3dB increase. At some point worthwhile increases in power will become impractical due to these factors. If you can pick up a 3dB increase in efficiency from your speaker system it can halve the amount of power needed to hit a specific SPL.


Sensitivity and Efficiency Myths
Sensitivity is Efficiency

This is a common mistake even for those who are experienced and educated about speaker design and audio. Voltage sensitivity is NOT efficiency. Voltage sensitivity is the frequency response of the system when stimulated with a fixed amount of voltage. The vast majority of amplifiers are constant voltage devices, which is why this type of information is important. Voltage sensitivity represents the response shape of the speaker and the amount of output it produces with a specified amount of voltage.

Efficiency is a measure of the devices output vs a fixed amount of power. There are a few ways to indicate this. Drivers will typically have a N0 or REF efficiency rating which is usually expressed as a %. Efficiency can also be expressed as a speakers SPL vs frequency with a constant amount of power. Amplifiers are not constant power devices, so this type of graph is rare, but very useful. The impedance of a loudspeaker varies with frequency so the amount of power applied from the amplifier varies with frequency and impedance regardless of whether it is constant voltage or constant current. The efficiency information can be backed out using Ohm's law. Speakers having the highest sensitivity are not necessarily the most efficient.

An obvious example of the difference between sensitivity and efficiency can be done theoretically. Take any woofer and double the BL product and compare it to the original in a simulated sealed box design. The driver with double the BL has a 6dB advantage in upper range sensitivity, but it will roll off much quicker towards the deep bass, thus making it appear to make less bass. This is not exactly true. The voltage sensitivity of the woofer has indeed decreased in the deep bass, but if the impedance curve is examined it will be noted that the impedance has gone way up as well. If a driver has a very strong motor it will have very high dampening and higher overall impedance with greatly increased impedance peaks with a much wider base. The high impedance reduces the current from the amplifier while receiving the same amount of voltage and while the driver is extremely efficient, it also pulls less current and power when provided with the same voltage. The driver with a weaker motor and less true efficiency will require more current from the amplifier and produce more output in the deep bass from the same voltage input but with lower dampening and more power being input. The take-away here is that extremely efficient drivers often have a voltage sensitivity that is worse in the deep bass range than a less efficient driver, but they actually produce more deep bass output when provided with the same amount of power. Extremely efficient systems will often not have the best constant voltage response shape and may require some signal shaping to change the response into a more traditional shape. Don't assume the voltage response is the final say in the systems performance.

Sensitivity / Efficiency do not matter for Subs

Sensitivity is important for subwoofers. Not all frequencies are limited by xmax. In fact most of the bass frequencies for music are really limited by sensitivity, or efficiency rather than driver displacement. Drivers with very high xmax are unlikely to run out of excursion above the 30-40Hz region in most cases. The "meat" of the music bass range is above 30Hz, so the limitation on output becomes the power handling of the driver in the cabinet and the capabilities of the amplifier driving it. Higher sensitivity and / or efficiency means more SPL with less voltage and power and ultimately better performance especially for upper range bass output through the crossover region.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on November 17, 2019, 10:44
Myth: Inductance does not matter for Subs
Traditionally it used to be thought that inductance did not matter in the bass range and that the effects of it were primarily above the sub range and could be ignored. As bass drivers have gotten more and more powerful with higher power handling and greater Xmax they have also increased the inductance effects of their coil / motor systems. Anyone who has analyzed measurements of subwoofers and compared them against simulations of the same subwoofers inside of modeling software can see that this is false.

The easiest way to see the effects of inductance on the subwoofers behavior is to model any subwoofer that has real world measurements taken of it, including measured driver parameters and then compare the results of the simulation against the measurements both with and without complex inductance effects included. The results of the modeling using complex inductance will match far more closely to the measured results from the real system. Without the drivers inductance factored into the simulation many of the higher inductance drivers will in no way match the measured results from the actual subwoofer at all. Inductance affects all aspects of the driver and cabinet systems behavior. Voltage sensitivity, response shape, distortion, group delay, excursion vs frequency, etc...The more complex the system is the larger these effects can become. For a sealed, OB or IB type system it may not be a big deal, but for more complex systems such as horns and band-pass subs it can radically affect the behavior.

Unfortunately very few manufacturers list complex inductance parameters for use in modeling their drivers. Many only list a 1kHz static Le rating which is well outside of a subwoofer or woofers bandwidth and inadequate to describe what is a complex behavior that varies with frequency and excursion. Some companies do not even list the simple 1kHz Le. Additionally some enclosure modeling programs do not account for complex inductance either.

Myth: Bass Speed
Subwoofers are Fast / Slow

It is a common misconception that sound quality is related to the woofers speed or quickness, but in fact the woofer's speed is related to the frequency it is producing and the SPL. There are two ways to change a woofer's speed. 1. Change the frequency of the signal it is reproducing or 2. increase the output / excursion. It may sound counter-intuitive, but it is true. There are many other factors that go into making a subwoofer sound fast, or slow, or boomy, tight, airy, or whatever subjective terminology is applied, but that divulges into system design and room acoustics primarily, rather the driver itself. Bass wavelengths by definition are slow to develop. Try listening to a subwoofer operating by itself sometime.

Another important concept along this line of thinking is that a subwoofer with deeper extension will tend to sound slower than a unit with less extension. This should not be surprising. The deepest frequencies are the longest and slowest to develop. If you are not used to very deep frequencies being reproduced it may sound less accurate or slow, but in reality the sub with deeper extension is reproducing content that the less extended unit is simply not producing well or at all. The fastest sounding bass is when there is no bass.

The concepts of overshoot, difficulties overcoming inertia, or ringing after the note ends also fall into this category. These terms indicate smearing in time of the signal. Fortunately it is relatively simple to look at a few things to determine if there is a problem. The driver or system "Q" or damping is one way. There is also group delay, energy decay, etc. Most studies show that the people are insensitive to even moderate amounts of energy delay in the bass range. Generally what causes these types of subjective terms to be used are differences in frequency response, rapid changes in response vs frequency and issues due to room or vehicle acoustics. In most cases the effect that the room has on the subwoofer response and energy decay rates dwarf those inherent to the design, unless the sub exhibits some truly bad issues. What's most important about this myth is that speed is an inappropriate concept of sound quality.

Smaller woofers sound faster than larger woofers

One of the biggest myths about woofers is that smaller units like 8's and 10's sound "tighter" and "faster" than 15's or 18's. Even bigger drivers such as 21's and 24's are supposedly worse than 15's or 18's. This can be true in some specific cases, but as a blanket statement of all drivers this is factually incorrect.

This subjective impression is often caused by factors other than the simple size of the driver. What tends to happen is that the smaller drivers have a lower Qts because manufacturers tend to share one motor design across many different sizes of drivers in the series. They may have the same motor on the 10" driver that they have on the 15 or 18". Unless the motor can compensate for the extra mass it has to push, then the Qts will not be the same as the smaller drivers. Ultimately the larger driver may not be suited for the same kinds of alignments as the smaller driver and ends up requiring a much larger air volume for the same system "Q" and response shape. Typically the larger driver will end up in a higher "Q" undersized system with a less linear response shape that may cause it to sound more uneven or "one note". It may also end up being tuned much deeper in frequency and the increased low frequency output may also cause it to sound "slower" or "heavier". Smaller subs and those using smaller driver sizes are often not asked to go as low and will not have the same low frequency extension in their design. When comparing subs the one with more low frequency extension and output will sound quite different. Having said that, high Qts drivers are not inherently inferior sounding when compared to more efficient, highly damped drivers, but they require larger boxes and less internal pressure to prevent response peaking and increased group delay.

Large sub drivers can be made to have the same motor to cone ratio as smaller drivers. The larger woofers also have more room for bigger suspension components and voice coils which can allow higher power handling, more excursion capability and larger mechanical clearances that simply cannot fit on an 8 or 10" driver frame. It is more expensive to make larger driver sizes in this way, but not impossible. There are a number of good examples on the market. It's just a matter of picking the right driver for the job.

Impulse Response Indicates Subwoofer Speed or Tightness

This goes back to the myth that some subs are fast / slow. An impulse response represents a ton of condensed information. Too much to compare them directly against each other at a glance and make determinations about performance. The quickest way to make a very short, abrupt, impulse response graph, is to remove all of the bass from the speaker being measured. Bass frequencies require a long time to develop and will extend out the impulse response by their very presence. Simply changing the frequency response balance of the system, or changing the frequency range covered by the measurement will change the way the impulse response looks. For these reasons it is almost impossible to eyeball a pair of impulse responses from units having dissimilar frequency response shapes, or measurement bandwidths and make a direct comparison.

Myth: Cone Material Affects the "Timbre" of Subwoofers
At low frequencies, in the bass region below 125Hz, the cone material has no effect on the sound. If it did it would only be because of peripheral side effects such as a large change in the moving mass of the driver, or a cone who's strength and stiffness is deficient for the application allowing a lot of flex and distortion. A subwoofers cone or diaphragm should be stiff enough to not flex appreciably even when under heavy air loads. Any sufficiently stiff subwoofer cone would have resonances or breakup modes which are well beyond the bass range and should be inaudible with a typical low pass filter applied. If we have 3 identical sub drivers with different cone materials, one with an aluminum cone, one with a carbon fiber cone and another with a pressed paper cone and all are adequately stiff and the total moving mass of the driver is within a few percent of each other they will be indistinguishable from each other in a blind listening test.

The main take away here is that subwoofer cone material choice is primarily a consideration of strength/stiffness/durability/cosmetics/cost and weight. Sound is not one of those considerations.

© data-bass.com 2019
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on November 17, 2019, 10:49
The above article best explain some of the commom myths regarding subwoofer,the writer is the owner of data-bass.com which have been doing subwoofer testing & measurement for years. Can read more other article as well as all the subs testing report & measurement here: https://data-bass.com/#/?_k=om2vog
Happy reading.
Title: Re: Official Rythmik Subwoofer Thread
Post by: SiaOLiaO on November 17, 2019, 17:15
As bro ronildoq said BEQ is not so complicated n don't need to rip your bd/uhd also. I'm happy to host u for a demo on BEQ,pm me to arrange if u're interested. In a good way BEQ had changed my movie watching experience. 😄


Thats generous of you! Sure let’s link up!
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on November 17, 2019, 19:01
Thats generous of you! Sure let’s link up!

👍🏻 Good job! Go for it man, it’s free! It’s worth it, trust me. No turning back once you BEQ
Title: Re: Official Rythmik Subwoofer Thread
Post by: SiaOLiaO on November 18, 2019, 09:47
👍🏻 Good job! Go for it man, it’s free! It’s worth it, trust me. No turning back once you BEQ

Yeah man, no harm trying, the only thing that could happen is... Bass no enough.. LOL
But the upgrade from LVX12 to F18 is phenomenal.. sheesh..
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on November 18, 2019, 12:18
Yeah man, no harm trying, the only thing that could happen is... Bass no enough.. LOL
But the upgrade from LVX12 to F18 is phenomenal.. sheesh..

Yes, very clean sounding, fast, accurate, has got the ULF weight, very satisfying. Very good choice. its a big step up from the LVX12. The subs are also not too big, so still can accommodate.

I personally highly recommend this sub, the design is also good, very good transient response, superb for music as well. All rounder indeed.

Great choice! next just get some help from NGSK, load in BEQ, then start enjoying your system. If you must, try and run in the subs with Brown noise. once its fully run in, then you can proceed with EQ and calibration.

All the best, sit back and enjoy !
Title: Re: Official Rythmik Subwoofer Thread
Post by: rayleh on November 18, 2019, 12:26
Yes, very clean sounding, fast, accurate, has got the ULF weight, very satisfying. Very good choice. its a big step up from the LVX12. The subs are also not too big, so still can accommodate.

I personally highly recommend this sub, the design is also good, very good transient response, superb for music as well. All rounder indeed.

Great choice! next just get some help from NGSK, load in BEQ, then start enjoying your system. If you must, try and run in the subs with Brown noise. once its fully run in, then you can proceed with EQ and calibration.

All the best, sit back and enjoy !

Although the foot print of this sub is not really huge but if to use at least dual subs then it will be a challenge. :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on November 18, 2019, 12:33
Although the foot print of this sub is not really huge but if to use at least dual subs then it will be a challenge. :)

yes it will be, but no pain no gain! hahaha.....

the servo is very good.....personally i would get this sub also if not for the seatons F18, or probably a G28 in the near future, if they had one... i am personally a big fan of the 18' subs and the ULF feeling it brings to the set-up, especially fantastic for movies when it comes to Bass EQ, nothing beats that satisfaction for me now......
Title: Re: Official Rythmik Subwoofer Thread
Post by: SiaOLiaO on November 18, 2019, 17:11
Yes, very clean sounding, fast, accurate, has got the ULF weight, very satisfying. Very good choice. its a big step up from the LVX12. The subs are also not too big, so still can accommodate.

I personally highly recommend this sub, the design is also good, very good transient response, superb for music as well. All rounder indeed.

Great choice! next just get some help from NGSK, load in BEQ, then start enjoying your system. If you must, try and run in the subs with Brown noise. once its fully run in, then you can proceed with EQ and calibration.

All the best, sit back and enjoy !

Yeah I did not expect it to sound so much tighter than the 12". I thought the bass would be less tight due to the size, but it turned out to be totally opposite.
Don't get me started on the ULF, now I can hear my partition wall rattling against the cabinet. Really earthquake-like.. and i barely turn it up. Best investment ever.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on November 18, 2019, 19:10
Power Myths
More Power = More SPL

This one is very common especially in the car audio scene where customers will ask "How many watts is it?" when evaluating a sub or amp. The assumption is that the sub with the higher power rating will be louder. This cannot be determined by something like a power handling rating since it depends on so many factors including: The efficiency and sensitivity of the driver, its linearity at high output, the cabinet it is loaded into, the signal it is reproducing, the capabilities of the amplifier driving it and its power handling and compression.
Power Handling

Most would assume that the "rms" or "continuous" power rating of a speaker means that it could never be damaged by this amount of power or less and will be "safe" under any circumstances as long as the rated amount of power is not exceeded. False. The truth is that even a relatively small amount of continuous or average power applied at a worst case frequency will eventually exceed the cooling ability of the voice coil. You see plenty of big subs rated at over 1000 watts these days. This is not truly a continuous power rating. Remember most subs are < 1% efficient meaning that 99% of the power applied to the coil is turned into heat. A voice coil that can survive dissipating 990 watts of heat buildup over a long period is going to be very rare indeed. Duration of the signal is key. Most subs will handle many times more than their power rating for a brief moment such as a kick drum hit. That same amount of power applied for 30sec continuously could burn the coil out easily. What the manufacturers typically mean when they specify a power handling figure is: When used with appropriate filtering, in a suitable cabinet, with typical music content / crest factor and an amplifier of the specified power rating. This is a far far cry from a true 100% duty cycle signal applied at a frequency which causes minimum cooling of the coil. Most music approximates 1/8th to 1/4 duty cycle at worst. What this means is that when you are playing your sub and the 1000w rated amplifier is at clipping this does not mean that the sub is getting "1000 watts" It might be on certain peaks, but the average power as the music signal varies is far lower and this must be considered against the impedance vs frequency of the sub as well. Maximum power is only applied into the frequencies with the lowest impedances. In this typical scenario the true average power is more likely to be <200 watts.
To complicate things even further the way power ratings are specified is all over the map depending on which manufacturer it is. The better ones use AES, Klippel, or CEA-2031 developed ratings. Some of them appear to pull a number out of thin air.

Big Subs need Bigger Amps

This is another widespread myth. The fact is that bigger subs will often be more efficient, more sensitive and have higher power handling and total displacement. Larger drivers with more cone area will usually improve efficiency and sensitivity. A bigger or more powerful motor system will often result in increases as well. A larger cabinet gives more airspace for the drivers to work in which increases low end efficiency and sensitivity also. Bigger drivers with more cone area, power handling and xmax can have better linearity and less output compression. All of this adds up to more output from a fixed amount of power. It may be true that a larger amp is needed to push the bigger more powerful subs to their maximum output potential, but in a lot of cases a bigger sub will also produce more output than a lesser/smaller sub with equivalent power. The bigger sub actually needs less amplifier to produce the same output as a smaller sub in many cases.
With the way that power increases translate into SPL, system efficiency becomes very important for things like professional sound reinforcement and car audio SPL competitions. A doubling of power only translates into a 3dB increase in SPL IF the speaker system is not compressing, which would result in a less than 3dB increase. At some point worthwhile increases in power will become impractical due to these factors. If you can pick up a 3dB increase in efficiency from your speaker system it can halve the amount of power needed to hit a specific SPL.


Sensitivity and Efficiency Myths
Sensitivity is Efficiency

This is a common mistake even for those who are experienced and educated about speaker design and audio. Voltage sensitivity is NOT efficiency. Voltage sensitivity is the frequency response of the system when stimulated with a fixed amount of voltage. The vast majority of amplifiers are constant voltage devices, which is why this type of information is important. Voltage sensitivity represents the response shape of the speaker and the amount of output it produces with a specified amount of voltage.

Efficiency is a measure of the devices output vs a fixed amount of power. There are a few ways to indicate this. Drivers will typically have a N0 or REF efficiency rating which is usually expressed as a %. Efficiency can also be expressed as a speakers SPL vs frequency with a constant amount of power. Amplifiers are not constant power devices, so this type of graph is rare, but very useful. The impedance of a loudspeaker varies with frequency so the amount of power applied from the amplifier varies with frequency and impedance regardless of whether it is constant voltage or constant current. The efficiency information can be backed out using Ohm's law. Speakers having the highest sensitivity are not necessarily the most efficient.

An obvious example of the difference between sensitivity and efficiency can be done theoretically. Take any woofer and double the BL product and compare it to the original in a simulated sealed box design. The driver with double the BL has a 6dB advantage in upper range sensitivity, but it will roll off much quicker towards the deep bass, thus making it appear to make less bass. This is not exactly true. The voltage sensitivity of the woofer has indeed decreased in the deep bass, but if the impedance curve is examined it will be noted that the impedance has gone way up as well. If a driver has a very strong motor it will have very high dampening and higher overall impedance with greatly increased impedance peaks with a much wider base. The high impedance reduces the current from the amplifier while receiving the same amount of voltage and while the driver is extremely efficient, it also pulls less current and power when provided with the same voltage. The driver with a weaker motor and less true efficiency will require more current from the amplifier and produce more output in the deep bass from the same voltage input but with lower dampening and more power being input. The take-away here is that extremely efficient drivers often have a voltage sensitivity that is worse in the deep bass range than a less efficient driver, but they actually produce more deep bass output when provided with the same amount of power. Extremely efficient systems will often not have the best constant voltage response shape and may require some signal shaping to change the response into a more traditional shape. Don't assume the voltage response is the final say in the systems performance.

Sensitivity / Efficiency do not matter for Subs

Sensitivity is important for subwoofers. Not all frequencies are limited by xmax. In fact most of the bass frequencies for music are really limited by sensitivity, or efficiency rather than driver displacement. Drivers with very high xmax are unlikely to run out of excursion above the 30-40Hz region in most cases. The "meat" of the music bass range is above 30Hz, so the limitation on output becomes the power handling of the driver in the cabinet and the capabilities of the amplifier driving it. Higher sensitivity and / or efficiency means more SPL with less voltage and power and ultimately better performance especially for upper range bass output through the crossover region.

Fantastic sharing ! Some of these were shared by Mark seaton to me 2 years ago, when I was bombarding him with tons of bass questions. I didn’t believe much, or rather found it hard to believe, not until the later stages with measurements, I finally confirmed many things and my understanding

Good information, clears all the doubt.
Title: Re: Official Rythmik Subwoofer Thread
Post by: kenshin07 on December 23, 2019, 18:45
Just gotten my rythmik f18 from peng. Just nice can start run in till christmas and start to do my calibration.

First impression, super heavy. The enclosure is just nice not too big as i thought. Run thru some bass demo clips just to try out, really nice the deep bass. Will try to align the f18 with my dual sub36 and see how it can perform.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Djblackfm on December 23, 2019, 18:51
Congrats! Definitely a good sub.
Title: Re: Official Rythmik Subwoofer Thread
Post by: keai on December 23, 2019, 23:51
Just gotten my rythmik f18 from peng. Just nice can start run in till christmas and start to do my calibration.

First impression, super heavy. The enclosure is just nice not too big as i thought. Run thru some bass demo clips just to try out, really nice the deep bass. Will try to align the f18 with my dual sub36 and see how it can perform.

Congras Ken! seems I might pay you another visit after F18 is well integrated into your system, enjoy! :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on December 24, 2019, 08:54
Congrats ken ! Very good choice with the f18 there.

Some challenges there with integration of different model and design, but I believe you will get there !

Definitely, a must have is BEQ. I assure u there is no turning back once u BEQ on the f18

When u time align the servo subs with the starke passive radiator, the approach will be slightly different because of the design on the subs itself.

Ideally I would use higher sweeps from 30hz onwards to maximum available , in case servo somewhere along the signal path is having an effect. I noticed it when dialing in NGSK f18s. But his is easier because all are identical

Yours will be challenging, but don’t worry, Should be able to blend. Will get in touch with u in the approach for this
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on December 24, 2019, 10:05
Just gotten my rythmik f18 from peng. Just nice can start run in till christmas and start to do my calibration.

First impression, super heavy. The enclosure is just nice not too big as i thought. Run thru some bass demo clips just to try out, really nice the deep bass. Will try to align the f18 with my dual sub36 and see how it can perform.

Bro Enjoy your happy Festive toy. :) Welcome back to the Rythmik club again :) this time all seal nice. :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on December 24, 2019, 11:03
Kenshin, what made you go the F18 route?
Title: Re: Official Rythmik Subwoofer Thread
Post by: keai on December 24, 2019, 13:24
Kenshin, what made you go the F18 route?

craving for ULF/BEQ, :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on December 24, 2019, 14:06
Just gotten my rythmik f18 from peng. Just nice can start run in till christmas and start to do my calibration.

First impression, super heavy. The enclosure is just nice not too big as i thought. Run thru some bass demo clips just to try out, really nice the deep bass. Will try to align the f18 with my dual sub36 and see how it can perform.

Wah someone poisoned deep deep Liao huh Hahahaha  ;D

If you like it, go for dual f18 easier to get one coherent bass note
Title: Re: Official Rythmik Subwoofer Thread
Post by: kenshin07 on December 24, 2019, 14:51
Kenshin, what made you go the F18 route?

After measuring my area i decide to go for seal due to it compact size, secondly i have another 2 seal sub maybe for easier integration just try out.
Title: Re: Official Rythmik Subwoofer Thread
Post by: kenshin07 on December 24, 2019, 20:49
Wah someone poisoned deep deep Liao huh Hahahaha  ;D

If you like it, go for dual f18 easier to get one coherent bass note

Haha, went to jag place and got poisoned but my place cannot accommodate ported sub.
Title: Re: Official Rythmik Subwoofer Thread
Post by: whitesox on December 24, 2019, 21:17
Congras Ken! seems I might pay you another visit after F18 is well integrated into your system, enjoy! :)

Wow..... shake shake huh bro? congrats.

New year eve...
Perhaps we can visit him and kan-pei also to welcome a new year 2020
 ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: keai on December 24, 2019, 21:20
Wow..... shake shake huh bro? congrats.

New year eve...
Perhaps we can visit him and kan-pei also to welcome a new year 2020
 ;D

overseas now so not able to celebrate new year together this year....:(
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on December 26, 2019, 18:36
Haha, went to jag place and got poisoned but my place cannot accommodate ported sub.

dual f18 will be great bro. Easier to integrate and have coherent bass note and signature.

It helps that this F18 is quite compact for a 18" sub! Impressed
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on December 30, 2019, 10:07
Just gotten my rythmik f18 from peng. Just nice can start run in till christmas and start to do my calibration.

First impression, super heavy. The enclosure is just nice not too big as i thought. Run thru some bass demo clips just to try out, really nice the deep bass. Will try to align the f18 with my dual sub36 and see how it can perform.

Congrats bro! As ron said start BEQ,restore what's 'missing' b4 n enjoy!!!
As i said to another bro here,u might found the f18 gettig smaller in no time also! ;D ;D ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: Djblackfm on December 31, 2019, 07:47
Caught this in FB.

Here is the G22, baby brother of the G25HP. Dual 12" opposed aluminum cone drivers in a sealed cabinet with HX800XLR3 amp.(https://uploads.tapatalk-cdn.com/20191230/9118442783b5af7b4962349b5eb31345.jpg)(https://uploads.tapatalk-cdn.com/20191230/69e9e2cda26840f79b24ee4d5bd9d49b.jpg)(https://uploads.tapatalk-cdn.com/20191230/2cbe610ea41aa124540c985adf4ffee9.jpg)(https://uploads.tapatalk-cdn.com/20191230/540ef4f3dc8de305692873c6b0e6f6bc.jpg)

Sent from my SM-G965F using Tapatalk

Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on January 01, 2020, 08:22
This G22 is coming to SGP soon. Other than the already mentioned FV28/G28 a sealed F25hp might be in planning also with same driver/amp as the FV25hp,an upgrade version of F25. So many choices now from Rythmik: saeled,ported,dual opposed with 12",15",18" drivers.
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on January 01, 2020, 12:25
Looks good!
Not sure if peng have any estimated pricing for G22.

Thanks
Title: Re: Official Rythmik Subwoofer Thread
Post by: kenshin07 on January 12, 2020, 12:23
After running in for couple of weeks, finally managed to align the 3 subs together. :)
This is only time align, not with audysee yet. :)

Placement of the subs,
Rythmik F18 -> Front Left
1st Starke Sub36 -> Sofa Left
2nd Starke Sub36 -> Sofa Right

(https://i1244.photobucket.com/albums/gg574/wuipinho/20200105_130853_zps5alnzgb2.jpg) (https://s1244.photobucket.com/user/wuipinho/media/20200105_130853_zps5alnzgb2.jpg.html)

Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 12, 2020, 15:41
Great job bro, the left starke can have 0.2ms delay and rythmik 0.3ms delay for a perfect sum at MLP. Both first and second impulse aligned, they will sum in phase perfectly

Overall very good.

Next u can run audyssey now with all 3 subs as 1 , using single preout from avr

Then blend again mains + subs post audyssey , with XO engaged

Once ready, time for BEQ
Title: Re: Official Rythmik Subwoofer Thread
Post by: rayleh on January 12, 2020, 15:53
Great job bro, the left starke can have 0.2ms delay and rythmik 0.3ms delay for a perfect sum at MLP. Both first and second impulse aligned, they will sum in phase perfectly

Overall very good.

Next u can run audyssey now with all 3 subs as 1 , using single preout from avr

Then blend again mains + subs post audyssey , with XO engaged

Once ready, time for BEQ

Bro, can elaborate on how to align the subs and main post Audyessy. Able to share the steps?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 12, 2020, 19:19
Bro, can elaborate on how to align the subs and main post Audyessy. Able to share the steps?

First gotta identify the mains roll off. Measure mains alone with everything off. If it rolls off at 40hz, then your ideal XO or a good starting point will be one octave above that, ie 80hz. Once u have this ready, overlay then with your subwoofer measurements

Remember don’t use channel 4, use channel 3 to measure your subs, with channel 3 amplifier muted , then u know bass management working as intended

Overlay subs and mains

Use surround backs or surround as the acoustic timing reference speaker. Measure centre with subs muted, then measure sub with centre muted, overlay the impulse this time.

The second impulse from the speakers relate to the woofer. Align this woofer to your subwoofer, like the above done by ken . Use a sweep from 20-300hz, with subwoofers set to maximum LPF, 160hz or 200hz. The higher the better and more accurate

Alternatively, sweep from 60-300hz, overlay again, for the speaker impulse, look at the second rise

Once they are aligned, u will see that they will sum up at the XO point
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 12, 2020, 19:26
When u have identified that a 5ms delay is required, this will need to adjusted for all subs. Meaning all subs will have 5ms delay. Because u have already aligned the delays between the subs previously. Now u are only adjusting for all subs against the speakers

Only adjust the delays on the subs, do not adjust the delays on the speakers.

Do look at the rest of the speakers as well, use a higher xo if necessary. If they are well integrated, u will not be able to localise the subs

Title: Re: Official Rythmik Subwoofer Thread
Post by: rayleh on January 12, 2020, 22:59
Thanks bro. I assume Audyessy needs to be turned off when taking the measurements?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on January 13, 2020, 08:29
Thanks bro. I assume Audyessy needs to be turned off when taking the measurements?

No no, it should be turned on at this stage. The whole idea is to test and see if the mains and subs blend, so if it blends, when u watch your movies, they will sound good

That is why at this stage, crossover to mains from subs should be engaged, because each time you introduce a filter, they will introduce delays. This delay causes a phase shift

So u want to blend it in with these filters turned on and engaged. so u can see what they do and how to set it right, once set right, it will mirror your actual listening experience.

As for the initial  stage to switch off audyssey, it is to check what the individual subs response are at its location, the purpose is the excite their modes in your room, to find a spot where they blend and help each other. (Dual subs). That’s the main goal. At that stage, then yes, audyssey turned off. Once u find they help each other, u affix the subs to those positions. Only then u proceed with EQ
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on February 09, 2020, 10:01
There's no review/measurement on the 12" Rythmik sub on data-bass.com but a guy posted a link on his review/measurement on the F12G @avsforum,this 1 with GR Research/Rythmik co-development 12" SW-12-04 paper cone driver, here's the link: https://www.erinsaudiocorner.com/loudspeakers/rythmik-f12g-direct-servo-subwoofer/
Although it's from 2013 but to what i know till date this sub is still the same as the reviewed 1.
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on March 08, 2020, 17:47
Updated info thread for Rythmik Fans :)

https://www.avsforum.com/forum/113-subwoofers-bass-transducers/3128182-rythmik-subwoofer-faq.html
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on March 21, 2020, 09:17
https://www.audiosciencereview.com/forum/index.php?threads/rythmik-l12-subwoofer-review.12140/
Review on the 'cheapest' Rythmik sub: L12 on audiosciencereview,first subwoofer Amir reviewed,not as details as data-bass.com but it's good to see smaller subwoofer get measured,the L12 is 599usd shipped in USA,the output/freq response is solid & distortion is also low @ the tested level.
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on March 21, 2020, 13:42
https://www.audiosciencereview.com/forum/index.php?threads/rythmik-l12-subwoofer-review.12140/
Review on the 'cheapest' Rythmik sub: L12 on audiosciencereview,first subwoofer Amir reviewed,not as details as data-bass.com but it's good to see smaller subwoofer get measured,the L12 is 599usd shipped in USA,the output/freq response is solid & distortion is also low @ the tested level.

Very good readup @review.

Been trying 12" , 15" and never find the type of bass I want for Home Theatre.
Once on Rythmik 18s, just love the superb punchiness & meaty weight of the mid bass no turn back!
 
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on March 21, 2020, 16:14
https://www.audiosciencereview.com/forum/index.php?threads/rythmik-l12-subwoofer-review.12140/
Review on the 'cheapest' Rythmik sub: L12 on audiosciencereview,first subwoofer Amir reviewed,not as details as data-bass.com but it's good to see smaller subwoofer get measured,the L12 is 599usd shipped in USA,the output/freq response is solid & distortion is also low @ the tested level.

The L12 is a VFM sub. This model seems quite popular in the USA.

Hope this model can be brought in to SG one day as it can be a good option for those of us who don't prefer to have a high expenditure for HT. And very small footprint!

Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on March 21, 2020, 16:35
any news on the G22 and G25?

This 2 dual opposed subs footprint and performance seems something to beat for equivalent subs.
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on March 21, 2020, 17:31
https://www.audiosciencereview.com/forum/index.php?threads/rythmik-l12-subwoofer-review.12140/
Review on the 'cheapest' Rythmik sub: L12 on audiosciencereview,first subwoofer Amir reviewed,not as details as data-bass.com but it's good to see smaller subwoofer get measured,the L12 is 599usd shipped in USA,the output/freq response is solid & distortion is also low @ the tested level.


Yea I thought the databass review is a better one to follow for subwoofers review. What’s missing from Amir’s sub review is the CEA-2010 distortion test, nicely covered by josh . That’s quite an important measurement that tells u lots of things

But his amplifier & AVR reviews TOP notch

 
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on March 23, 2020, 22:08
Did ask for an update update launch for FV28HP or G28
seem like G28 is on the roll.

Quote:

G28 should be available in fall this year. FV28 has been postponed indefinitely. The reason is the tooling for port cap and port elbow is prohibitively expensive. The prototypes with 4 ports is simply too difficult for production. I need to use larger ports, and hence new tooling. Secondly, FV28 is simply too heavy even for us to handle. Thirdly, Cost wise, the final cost will be just a bit less than 2x FV18. It is not a huge saving. For these reasons, we will go ahead with G28 only.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on March 23, 2020, 22:16
you need lot of open space , so not to block both side of the driver else no point using G22 ,G25,G28 in a normal size hall that most cant even put in a F18. :'(
most of the G25 in SG are using in the dedicated Ht room that we install behide the screen or along both side wall.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on July 23, 2020, 18:51
Some will receive your F18 tonight, before midnight.
Thanks for all your support
(https://uploads.tapatalk-cdn.com/20200723/071237dfb415e80a7b46793f417924ad.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on July 25, 2020, 15:29
G22 , G25 or .....

(https://uploads.tapatalk-cdn.com/20200725/3a267b58b58ced6c51a0f76b6453e383.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on July 25, 2020, 19:38
G22 , G25 or .....

(https://uploads.tapatalk-cdn.com/20200725/3a267b58b58ced6c51a0f76b6453e383.jpg)
G28 la!!! ;D ;D ;D ;D Any news?
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on July 25, 2020, 19:39
G28 la!!! ;D ;D ;D ;D Any news?
I send to your place ....
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on July 25, 2020, 19:40
Pic from a customer

(https://uploads.tapatalk-cdn.com/20200725/2506d2a094b31de5679374a38c2d86af.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on July 25, 2020, 19:50
I send to your place ....
No problem but have to know the price first otherwise come in no go out 'die' liao! : ;D ;D
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on July 25, 2020, 19:58
No problem but have to know the price first otherwise come in no go out 'die' liao! : ;D ;D
then you must find me some space in the room first , if not really in liao can’t go out too heavy to carry and the size ......
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on July 25, 2020, 20:02
Another work in progress...
twin 18” front and ..... and ....
(https://uploads.tapatalk-cdn.com/20200725/49a7fd15dc2c3bd1d1f5bb861de8b435.jpg)
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on July 25, 2020, 20:06
then you must find me some space in the room first , if not really in liao can’t go out too heavy to carry and the size ......
This 1 easy la just behind the seat drivers 'fire' to both sides can liao or on the rear F18 spot,last i read the G28 is 'only' 26" long so not a problem,only problem is..... :D
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on July 25, 2020, 20:19
This 1 easy la just behind the seat drivers 'fire' to both sides can liao or on the rear F18 spot,last i read the G28 is 'only' 26" long so not a problem,only problem is..... :D
to carry in a 100kg.....
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on July 25, 2020, 20:30
to carry in a 100kg.....
Got so heavy meh? F18 'only' 52kg.
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on July 25, 2020, 22:13
No problem but have to know the price first otherwise come in no go out 'die' liao! : ;D ;D

3 F18s + Crowsons + G28 ? lollll
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on July 25, 2020, 22:23
G28 should be heavier than a fv25. And that’s already almost 100kg.
Title: Re: Official Rythmik Subwoofer Thread
Post by: rock123 on July 25, 2020, 22:46
Pic from a customer

(https://uploads.tapatalk-cdn.com/20200725/2506d2a094b31de5679374a38c2d86af.jpg)

wow look like Kenshin and Alvin got their Dual F18s liao. Enjoy!
Title: Re: Official Rythmik Subwoofer Thread
Post by: ngsk on July 26, 2020, 08:52
3 F18s + Crowsons + G28 ? lollll
;D ;D ;D ULF is damn 'additive' more headroom is always 'welcome' 1 but no la i gotta 'home trial' the G28 if possible first to decide,anyway it'll remain as 3xF18s+Crowson MAs or 2xF18s+G28+Crowson MAs depends on the performance/price as main consideration factor. Either combination will take out all 4x minidsp output liao so no more extra sub.
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on July 26, 2020, 12:28
Wow more bros upgrading to 18". So good

Envy u guys whose family and space allow u to take 18" subs.

I can only admire with eye power ha
Title: Re: Official Rythmik Subwoofer Thread
Post by: rayleh on July 26, 2020, 14:11
Wow more upgrades to 18". So good

Envy u guys whose family and space allow u to take 18" subs.


I can only admire with eye power ha

Me too, only can envy until I have my own dedicated HT room.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on July 26, 2020, 14:28
lot of time more is no good , if you are not prepare to do something or rearrange the layout , adding more is also adding more problem , if you don’t understand your actual need and what your room can take and no proper tools to set it up .
Title: Re: Official Rythmik Subwoofer Thread
Post by: kenshin07 on July 26, 2020, 16:07
Actually is true, more doesnt mean good if you dont know how to control. Even running in the second f18, you already feel that there more head room. Hopefully by next week i am able to recalibrate.
Title: Official Rythmik Subwoofer Thread
Post by: econav on July 26, 2020, 16:53
it took me most of the time non STOP 24/2 days to find out the capability of each new Sub with a proper sound track with freq mix and heat sensing control software to monitor and control the playback signal and a pre define SPL for each driver to start the burnt in processor .

A proper run in driver vs a normal/ casual used for a year driver the sound is still dif on the low extension and smoothness......
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on July 27, 2020, 13:50
Very good choice going for the f18s, congrats 🥳 those of you who have just received the f18, definitely run them in, the smoothness can be felt, as mentioned by econav, most often after a 50hr break in period

Try and use brown noise To break them in, there will be a difference once it breaks in, the most obvious will be the smoothness

Start off with intervals of 1hr break in using the clip here , at MV-20, as you approach the last hours, try with louder volumes shorter runs, amplifier gets hot too. So intervals help, this should be good exercise for the Drivers

http://www.youtube.com/v/RqzGzwTY-6w&fs=1

Remember to BEQ the movies once finished dialing in the system, enjoy !! No turning back for those who stacked, having the headroom is always welcomed :)
Title: Re: Official Rythmik Subwoofer Thread
Post by: kenshin07 on August 04, 2020, 16:35
Thanks ron for the tips.
Just finished the calibrition with all the subs not with mains yet, already can feel a big different. The ulf is getting more additive. One more thing the f18 integration with sub36 is just nice for me.
Title: Re: Official Rythmik Subwoofer Thread
Post by: Jag on August 04, 2020, 18:37
Looks like the bottom trawlers are now growing. The ULF appeal is very strong once you’ve grown into it. I remember getting sucked into ULF when LOTR was released. Fast forward to today, ULF subs MUST be accompanied with BEQ and a good tactile transducer( Crowsons or butt kicker).

There are just TOO MANY  movies that are AMAZING when used with a true full range sub and tactile transducers.
Title: Re: Official Rythmik Subwoofer Thread
Post by: econav on August 04, 2020, 18:54
One more thing the f18 integration with sub36 is just nice for me.
send you a file, chk mid to ul .......
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on August 04, 2020, 22:48
Very good choice going for the f18s, congrats 🥳 those of you who have just received the f18, definitely run them in, the smoothness can be felt, as mentioned by econav, most often after a 50hr break in period

Try and use brown noise To break them in, there will be a difference once it breaks in, the most obvious will be the smoothness

Start off with intervals of 1hr break in using the clip here , at MV-20, as you approach the last hours, try with louder volumes shorter runs, amplifier gets hot too. So intervals help, this should be good exercise for the Drivers

http://www.youtube.com/v/RqzGzwTY-6w&fs=1

Remember to BEQ the movies once finished dialing in the system, enjoy !! No turning back for those who stacked, having the headroom is always welcomed :)

Wow brown noise. Thx for the new learning point hehe

How many hz is the brown noise? Anyone knows...
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on August 05, 2020, 19:00
(https://uploads.tapatalk-cdn.com/20200805/f91181827ad8851a808e6f72f72c089f.jpg)

Brown noise is ideal for breaking in the Drivers, gives the drivers good exercise ! They go down easily to 10hz  and below and It has lotsa Low frequency energy, and as you can see the chart above, there is significantly more energy down lower frequencies . It is also ideal for sleep. Some infants sleep better with this noise playing. I got to know this when my sister played it for her baby 5 years ago. She had to play this (at Low volumes) so her baby sleeps through the night well.

(https://uploads.tapatalk-cdn.com/20200805/02b462748638860b550a30830f517918.jpg)

Above in this pic here is white noise, the energies are much more even, looking at the plot of frequency bandwidth . It is used mainly for frequency response of electronics. I never find the need to use this at all

(https://uploads.tapatalk-cdn.com/20200805/433ca8b6bf4868f7af6867cf4fbab19b.jpg)

This one above, is pink noise

This is what we normally use in AVR test tones. Notice it carries more energy at higher frequencies compared to brown noise . I use REW’s tone generator feature to generate pink periodic noise (pink noise that plays continuously) when phase matching multiple subs using RTA


Sent from my iPhone using Tapatalk Pro
Title: Re: Official Rythmik Subwoofer Thread
Post by: sevenz on August 05, 2020, 19:16
Wah go down to 10hz

In this case, Will it be risky for subs that are smaller woofer like 12" and below to play this brown noise?
Title: Re: Official Rythmik Subwoofer Thread
Post by: ronildoq on August 05, 2020, 19:21
Wah go down to 10hz

In this case, Will it be risky for subs that are smaller woofer like 12" and below to play this brown noise?

Nope, no worries at all. Play at lower levels , what you wanna see is the drivers flexing its muscles, flex few times and it getS better and better

Once it’s fully run in, bass will sound very smooth , that’s my experience so far
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