Author Topic: Purifi 1ET400A Class-D amplifier  (Read 723 times)

Offline hyper

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Offline nihaoluc

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Re: Purifi 1ET400A Class-D amplifier
« Reply #1 on: January 13, 2020, 16:06 »
Hi Hyper!
I'm currently working on a dac-amp box with the Purifi dual mono kit
Luc

Offline nihaoluc

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Re: Purifi 1ET400A Class-D amplifier
« Reply #2 on: January 13, 2020, 16:13 »
I originally planned to use a dual mono NC500, but it looks like the Purifi goes one step further in audio quality and ease of integration

Offline hyper

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Re: Purifi 1ET400A Class-D amplifier
« Reply #3 on: January 13, 2020, 23:31 »
I heard Gentaudio is planning a full kit for it... I am gonna wait a while to see what he is offering. The evaluation kit is less than 1K and if u add the SMPS we are looking at 1.5k for a top end 2 ch 400w stereo amp.

I initially wanted to get from Nord but decided to wait after hearing Gent is offering a full DIY kit.

Offline hyper

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Re: Purifi 1ET400A Class-D amplifier
« Reply #4 on: January 13, 2020, 23:33 »
Hi Hyper!
I'm currently working on a dac-amp box with the Purifi dual mono kit
Luc

Wah so adventurous.... which DAC module are u using and what power supply?

Offline nihaoluc

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Re: Purifi 1ET400A Class-D amplifier
« Reply #5 on: January 14, 2020, 01:29 »
I heard Gentaudio is planning a full kit for it... I am gonna wait a while to see what he is offering. The evaluation kit is less than 1K and if u add the SMPS we are looking at 1.5k for a top end 2 ch 400w stereo amp.

i bought the purifi amp kit (dual mono + buffer) and an hypex smps3ka400 for less than 1k €

Offline nihaoluc

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Re: Purifi 1ET400A Class-D amplifier
« Reply #6 on: January 14, 2020, 01:32 »
Wah so adventurous.... which DAC module are u using and what power supply?

planning for the Soekris R2R dam1941 dac
power supply, i've already purchased the hypex smps3ka400, but i may change my plan. thinking.
maybe the cresnet, using 2 of them

Offline jaffrie

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Re: Purifi 1ET400A Class-D amplifier
« Reply #7 on: January 14, 2020, 08:47 »
Everyone likes different flavors. I would recommend that you go with linear ps. Have played with hypex for a while including 2 versions of the smps & at the end of the day the linear ps wins, ps caps used where Mundorf Mlytic & Shindengen rectifiers.

Offline hyper

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Re: Purifi 1ET400A Class-D amplifier
« Reply #8 on: January 14, 2020, 10:06 »
What’s the diff between SMPS3KA and SMPS1200A400? Hypex recommend to pair the NC400 and 500 with the latter one.

As for DAC, I just bought iFi Zen for MQA decoding and would leave the amp separate. I use my old IPad 2 as source streaming from Tidal. Best thing that happen since Spotify. Tears for Fears in Master quality is just sedap.... Vivaldi, Bach. 👍😬

I stream in my car with Tidal and the sound is also very good.
« Last Edit: January 14, 2020, 18:37 by hyper »

Offline nihaoluc

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Re: Purifi 1ET400A Class-D amplifier
« Reply #9 on: January 14, 2020, 20:08 »
Everyone likes different flavors. I would recommend that you go with linear ps. Have played with hypex for a while including 2 versions of the smps & at the end of the day the linear ps wins, ps caps used where Mundorf Mlytic & Shindengen rectifiers.

Hi Jaffrie,
Thanks for your info!
What model of linear ps did you use?

Offline nihaoluc

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Re: Purifi 1ET400A Class-D amplifier
« Reply #10 on: January 14, 2020, 20:11 »
What’s the diff between SMPS3KA and SMPS1200A400? Hypex recommend to pair the NC400 and 500 with the latter one.

just the power.
Nord uses one smps1200 per channel in some of their amps. The 3k can replace two 1200

Offline jaffrie

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Re: Purifi 1ET400A Class-D amplifier
« Reply #11 on: January 15, 2020, 18:36 »
Hi Nihaoluc,
Just simple EI trafos, I like to build my amps in mono mono hence seperate PS. If you can, look for split bobbin type.

Offline hyper

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Re: Purifi 1ET400A Class-D amplifier
« Reply #12 on: January 16, 2020, 18:39 »
just the power.
Nord uses one smps1200 per channel in some of their amps. The 3k can replace two 1200

I am leaning towards individual SMPS to power the modules. Likely be using smps1200 on each modules base on mono block footprint. I gonna stack them to reduce space 😂

Offline nihaoluc

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Re: Purifi 1ET400A Class-D amplifier
« Reply #13 on: January 21, 2020, 16:54 »
Micro-Audio are currently finishing the development of an SMPS specific for the Purifi amp module. Soon expected.
Their ps are recognized especially for component quality and low heating. And price is good too.
Usually evaluated better than Hypex'.

https://www.micro-audio.com/index.php?route=product/category&path=59

Waiting for the release...

Offline hyper

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Re: Purifi 1ET400A Class-D amplifier
« Reply #14 on: January 23, 2020, 14:17 »
Micro-Audio are currently finishing the development of an SMPS specific for the Purifi amp module. Soon expected.
Their ps are recognized especially for component quality and low heating. And price is good too.
Usually evaluated better than Hypex'.

https://www.micro-audio.com/index.php?route=product/category&path=59

Waiting for the release...

The 600W SMPS looks to be a good form factor to squeeze for dual mono in a small chassis... unless u put in those additional input buffers.

When are u going to start ops... can I join u? :)