Author Topic: Official Rythmik Subwoofer Thread  (Read 210502 times)

Offline sevenz

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Re: Official Rythmik Subwoofer Thread
« Reply #930 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

Offline ngsk

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Re: Official Rythmik Subwoofer Thread
« Reply #931 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
« Last Edit: December 30, 2019, 10:27 by ngsk »

Offline Djblackfm

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Re: Official Rythmik Subwoofer Thread
« Reply #932 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.

Sent from my SM-G965F using Tapatalk

If we don't share or exchange knowledge we won't grow & understand. Be more open, Share & Learn.

Offline ngsk

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Re: Official Rythmik Subwoofer Thread
« Reply #933 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.

Offline rock123

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Re: Official Rythmik Subwoofer Thread
« Reply #934 on: January 01, 2020, 12:25 »
Looks good!
Not sure if peng have any estimated pricing for G22.

Thanks
100% HT Lover 6.2.4  2.35:1 150' CYRUS Phantom Grey MK II 4k/UHD
BenQ W2700 4K HDR   Source: Oppo 203 & Egreat A5
1996 Sunfire Cinema Grand l Flagship Onkyo RZ-3100 11.2 THX® Select2™
M&K Sound LCR950 THX Select2 Series
Sub 1: Rythmik FV18 @900WRMS
Sub 2: SVS PB12-Plus/2 @900WRMS down-firing dual 12.3" three 4" Ports

Offline kenshin07

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Re: Official Rythmik Subwoofer Thread
« Reply #935 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



AVR: Denon AVC 8500
Power amp: Aragon 8008BB, Proceed 2/3
speaker: Front/Center/Surround/SurrBack:Dynaudio contour s1.4, dynaudio 210C | PSB imagine s surround | PSB Imagine mini | Atmos spk AG diva SE
Sub: starke dual sub36
EQ: Minidsp DDRC-24 dirca live
Player: Oppo 203
Cable: AFA Zeus II PC (SUB), ESP reference PC (pwr amp, AVR, Oppo 203), AFA Zeus II speaker cable, oyaide MTB 6 with AFA Zeus II PC

Offline ronildoq

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Re: Official Rythmik Subwoofer Thread
« Reply #936 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

Offline rayleh

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Re: Official Rythmik Subwoofer Thread
« Reply #937 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?

Offline ronildoq

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Re: Official Rythmik Subwoofer Thread
« Reply #938 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

Offline ronildoq

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Re: Official Rythmik Subwoofer Thread
« Reply #939 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


Offline rayleh

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Re: Official Rythmik Subwoofer Thread
« Reply #940 on: January 12, 2020, 22:59 »
Thanks bro. I assume Audyessy needs to be turned off when taking the measurements?

Offline ronildoq

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Re: Official Rythmik Subwoofer Thread
« Reply #941 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

Offline ngsk

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Re: Official Rythmik Subwoofer Thread
« Reply #942 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.
« Last Edit: February 09, 2020, 10:07 by ngsk »