Buckeye PURIFI 1ET9040BA Amp Review

[marcom22]

is there any European mfg that uses the "Micro Audio PSU" it's seems to be the way to fully utilize the 1ET9040BA module fully ?

Thanks for the question, me too I would ask the same question .....

 

[Buckeye Amps]

Make no mistake, I greatly appreciate this community and all of our customers. None of this would be possible without you.

 

[marcom22]

Make no mistake, I greatly appreciate this community and all of our customers. None of this would be possible without you.

If I may, I'd like to ask you what the substantial differences are between a Micro Audio SMPS power supply and a Hypex one (e.g., the Hypex SMPS1200A180). And if these differences are audible.

Thank you.

 

[tineared]

If I may, I'd like to ask you what the substantial differences are between a Micro Audio SMPS power supply and a Hypex one (e.g., the Hypex SMPS1200A180). And if these differences are audible.

Thank you.

Power supplies don't have an effect on the audio unless they are designed poorly
My understanding of these differences between power supplies are about total power available and efficiency of power utilization

 

[marcom22]

Power supplies don't have an effect on the audio unless they are designed poorly
My understanding of these differences between power supplies are about total power available and efficiency of power utilization

Total power and efficiency are huge differences

 

[Sokel]

Total power

Depends on the needs, we cannot blanket all PSUs on the planet under one rule.
Have a look at this typical Hypex PSU for example:

(link)

While perfectly fine for most cases and home listening, one may find it not adequate for some fringe use as its continuous power is about 1/4 of the one that can achieve for 10 seconds.
And so on, it's wild west out there, we cannot confine things only by our experience.

 

[Matias]

is there any European mfg that uses the "Micro Audio PSU" it's seems to be the way to fully utilize the 1ET9040BA module fully ?

Not Europe but from Australia I think March Audio P801 uses Micro Audio PSU too although they do not fully disclose it.

P801 Mono-Block Power Amplifier – March Audio

The P801 is March Audios new flagship mono block power amplifier. Based on the new Purifi 1ET9040BA module, this simply elegant product is milled from solid aluminium with a tough anodized treatment. Exceptional fit, finish and build quality. Class leading technical and subjective audio...

marchaudio.com

 

[Geert]

If I may, I'd like to ask you what the substantial differences are between a Micro Audio SMPS power supply and a Hypex one (e.g., the Hypex SMPS1200A180). And if these differences are audible.

Thank you.

In that review they measured V1 (with Hypex SMPS1200A180 PSU) and the new version. From these measurements we see the max. output power increased from 450 W to 690 W (@4 ohm).

 

[tineared]

From the Buckeye website:

 

[Buckeye Amps]

Not Europe but from Australia I think March Audio P801 uses Micro Audio PSU too although they do not fully disclose it.

P801 Mono-Block Power Amplifier – March Audio

The P801 is March Audios new flagship mono block power amplifier. Based on the new Purifi 1ET9040BA module, this simply elegant product is milled from solid aluminium with a tough anodized treatment. Exceptional fit, finish and build quality. Class leading technical and subjective audio...

marchaudio.com

P801 Power Amp

Hi everyone We are releasing our new flagship monoblock at the Australian HiFi Show in a few weeks time. Just thought I would share a little test data. Below is a plot of the P801 running at 5 watts as you would typically see on sites such as ASR. Distortion levels beat anything I have seen...

forum.marchaudio.com

They do, but claim it is a "custom" SMPS, maybe so they don't have to give credit where credit is due. Who knows.

 

[Redman43]

Amazing amp with more power than I will ever need. Not for me but bang for the buck is huge here.
To those that like VU meters and stuff get a analog or digital preamp.
This is a power amplifier. They are meant to sing NOT be starred at

 

[Redman43]

I made the mistake last month of reading a post on the Audiogon forums regarding Class D and their lack of "musicality". Oh boy.

I like to up the ante a bit and tell those people that "lack of musicality" is because of their "cheap signal cabels" and then I make myself a drink

 

[dtaylo1066]

Well, what more could one ask for at that price?

93% great, that must be a record or near record! It certainly shows more power than the college football offense of the same name did last week!!!

 

[David_M]

If I may, I'd like to ask you what the substantial differences are between a Micro Audio SMPS power supply and a Hypex one (e.g., the Hypex SMPS1200A180). And if these differences are audible.

Thank you.

I'll answer your question directly (as asked). The main difference is the maximum power output of the supplies. The Hypex supplies have a Pmax of about 1200W, so they cannot fully realize the maximum power output of 1400W of the 9040BA module in 2 ohms. The micro-audio power supply can fully realise the maximum capabilities of the Purifi module (and then some).

As to audibility between the two supplies, the answer is mostly no ... until you reach the clipping point. Beyond 1200W, the Hypex-based amp will clip, and that distortion could be audible. You'd have to exceed 1400W of the microaudio before you reach its clipping point.

 

[quattro98]

IMO "academic" is to understand that these out of band distortions are inaudible, and design the feedback loop based on this knowledge.

Maybe every class D review needs a link to the FAQ.

https://www.audiosciencereview.com/forum/index.php?threads/class-d-faq.19557/

It is possible that that there may be a tradeoff between making the out of band measurements look better at the expense of in band distortion.

https://www.audiosciencereview.com/...ifi-1et400a-amplifier.7984/page-7#post-194984

 

[Imakeller]

These have been wonderful L/C/R amps in my system and it’s gratifying to see testing confirmation from Amir. Dead silent and plenty of power on tap for any dynamic transients or low-ohm loads. These amps run cool and sip power at idle, to the point where I just leave them on. My only regret is not getting the rack mount cases, but Dylan advised me that I could upgrade cases in the future if desired.

 

[G|force]

Based on our sales, I would make a guess that most people care a lot more about performance and value vs. aesthetics, which has always been our approach.

My $.02- I'm not in need of separate power amplifiers, but if I was, I would happily use these based on performance even if all the bits were mounted on pieces of plywood.

 

[Mark609]

Let’s please move on from the aesthetics banter. Buckeye has made a choice and articulated his rationale. Contact him directly if you like, but further opinion posts are not productive.

Thanks!

Hey, we're just a bunch of snooty girlie men with knitting needles beating their bare chests while knitting some fine looney tunes.

 

[Buckeye Amps]

My $.02- I'm not in need of separate power amplifiers, but if I was, I would happily use these based on performance even if all the bits were mounted on pieces of plywood.

I could make a bespoke design mounted on a single piece of reclaimed plywood....

 

[G|force]

I could make a bespoke design mounted on a single piece of reclaimed plywood....

Sign the plywood with a sharpie- Bam! Signature edition.