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Review and Measurements of Purifi 1ET400A Amplifier

Krunok

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That's one of the best strawman arguments I've seen in a long time.

Dave.

What impresses me most, up to the point of feeling envy, is that I would need to take some shrooms or similar stuff to notice "the great depth of clarity, texture and dimensionality presented by via Amp 'A', but not Amp ''B'. " while he can tell the difference between amps just like that.
 

maty

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It was an idea. If a new DIY PCB input board is designed, in addition to the two changes noted, some additional functionality would be interesting or not.
 

maty

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About Purifi patents: https://www.diyaudio.com/forums/class-d/339838-purifi-1et400a-measurements-post5869710.html
  1. https://register.epo.org/application?number=EP18740251
  2. https://register.epo.org/application?number=EP18740859
  3. https://register.epo.org/application?number=EP18740252

Screenshot from 2019-08-01 14-25-27.png


Screenshot from 2019-08-01 14-40-34.png
 

Joachim Herbert

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Matias

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This first batch of modules is more expensive, later this year the mass volume ones will be available, let's see how prices are then.
 

grobalt

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Other brands will cost same, purify design / board is more expensive. I received some estimates weeks ago for Apollon purify Amps.
 

Labjr

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Other brands will cost same, purify design / board is more expensive. I received some estimates weeks ago for Apollon purify Amps.

Over $3,000 US for a stereo amp? That price is insane for what it is. Slightly better specs than Hypex. If DIY is anything close to that nobody will bite.
 

headshake

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@Matias touched on this about the nord purifi amp.

Limited Edition
The first ten customers to order will be able to get these limited edition amps with the pre-production boards from Denmark, contact Nord for prices. Full production models will be available from October. Monoblock and dual-mono stereo versions available.

https://hifipig.com/nord-three-se-purifi-1et400a-power-amplifiers/

Seems like $1500USD-1000USD a channel is what some folks are shooting for. The 3c Nord 1ET400A is $1272USD a channel to my door.

Two Hypex NC400 + SMPS1200A400 2ch connector kit + SMPS1200A400 is $850USD. I would still need a case, wires, and plugs. Ghent audio has them for around $250. So $550USD a channel for a DIY nc400 amp. The hypex DIY mono kit is $638USD a channel.

One can hope a DIY 1ET400A + PS + input board is under $350USD a channel. Bruno did say he'd be competitive.

 

Matias

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The mass volume prices are probably going to be priced slightly higher than Hypex.
 

Labjr

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Evidently, the price for DIY isn't going to be anywhere near the NC400 kit.
 

carlob

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The price from Nord is really good IMO. It cost £920 less than AHB2 and is a much more powerful amp (in watts).

Hi, random new user/old lurker here. Check your math: AHB2 is £3,199 (inc VAT), the Nord one is £2,279 exc VAT, which means £2,735 VAT included (is VAT at 20% in UK?) so it cost £464 less.
 

Cortes

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Hi, random new user/old lurker here. Check your math: AHB2 is £3,199 (inc VAT), the Nord one is £2,279 exc VAT, which means £2,735 VAT included (is VAT at 20% in UK?) so it cost £464 less.

I'd prefer to expend £464 more and get something with non marginal resell value in five years, as will happen with the Nord/Apollon amps.
 

Labjr

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I'm thinking the guys designing all these super value DACs will start getting amplifiers correct at some point.
 

orangejello

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You should also consider that if you need a bit of power, you will might need two AHB2's. If so, then you are looking at more like £6400 compared to £2,735. And this does not seem to be an uncommon occurrence if you look about the Internets. It seems that a large number of AHB2 owners bridge to mono.

I could not get into the AHB2 when I had it for a month on trial. It did not seem to deliver the power I needed, and I could not afford to double my expenditure. My speakers are nominal 4 ohm load and rated at 89dB efficiency. They also have a very benign impedance swing across the spectrum (don't dip much below 3 ohms). And I also do not listen to head-banger music or home theater. I primarily list to Classical, Jazz, Blues, etc. So I was surprised that the AHB2 didn't do it for me.

On the other hand, in order to stress out my my Hypex nc400-based stereo amp (which puts out 300w/channel into 8 ohms) I listened to some Bach organ music at loud volumes the other day to see how it would do. I cranked it up. The sound was magnificent. No, it is not like being in German cathedral, but you certainly get the gist.

The AHB2 may sound great in bridged mono mode. I don't know. But the ncore sounds fantastic and the Purifi module is a more powerful refinement of it. As far as measurements go, the Purifi module and the AHB2 are both closing in on the "straight wire with gain" category. But their ability to powers speakers is quite different in my experience.
 

maty

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