ASR list of known class D home audio amplifiers.

[Laserjock]

I have a Red Dragon Audio S500 running my surrounds but it seems the company has finally closed shop.
I believe it’s based on a Pascal module

 

[Old_School_Brad]

IIRC it was decided not to include pro amps in this list, which would exclude all but the MX-D1.

Those power specs are almost as slippery as the ones we see for cheap chip amps. No distortion level is given, and duration is very short:

Okay. I didn't see that.
And yes, Yamaha dropped the ball hard with these specs. Unusual for them.

 

[Count Dacula]

I'm still tracking, and getting ready to leave town. I appreciate the feedback (pun intended)

I'm idealizing a sort of subjective ranking, mostly based on instrumented tests. I know that sounds contradictory, but let's subjectively rank the power claims. I can just throw out some chipsets for consideration....if we're still into it.

 

[Descartes]

It'd be good to have a summary of each chip's know characteristics, like a reasonable guess at the power level, even if it's just relative to each other.

I want something equivalent to a 55w receiver, maybe up to like 90w at 8ohm Old School units. I need to keep going back thru the specs and tests of D class amps I already have here, and comparing them on the fly. I have a few old receivers that are rated at 35 to 55w and they are punchy.

Here's this... View attachment 395997

We need a larger picture of the blue ones with links to Amir’s reviews pleaser!

 

[Count Dacula]

We need a larger picture of the blue ones with links to Amir’s reviews pleaser!

It zooms fine, right from the link. Maybe I'm getting a cached image... but I don't think so. https://www.audiosciencereview.com/forum/index.php?attachments/best-amp-review-png.395997/

Just to expand on the RMS thing though.... I'm not obsessed with amp power, but I do listen loudly. For me, I own a bunchload of different sized speakers. Even if I was a novice, I just want to be able to match up smaller range speakers with mid and small amps. It is actually more acute with a small system, different than a few watts would be with some big overpowered beast!

My larger ones, I know how each amp is rated and performs....not a heck of a big difference, but Amir's testing clarified things. At least I can rank them...

 

[Count Dacula]

I collected some modest receivers to fill different rooms with a small system. I demand a little 2ch action on ANY TV I am exposed to, you know how it is.

Units I would normally cherish, like my 35w Stasis Nakamichi SR-2, can be easily replaced now. I just want to be sure the replacements are just right....

https://www.hifiengine.com/manual_library/nakamichi/sr-2.shtml

Specifications​

Tuning range: FM, MW

Power output: 30 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.1%

Input sensitivity: 2.5mV (MM), 200mV (line)

Signal to noise ratio: 80dB (MM), 105dB (line)

Output: 200mV (line)

Speaker load impedance: 4Ω (minimum)

 

[Descartes]

Wonder how these would test from Amir?

The Classe Audio CA-M600 Mono Amps

The Classe Audio CA-M600 Mono Amps Brawn and Brain October, 2011 Classe’ Audio has been one of the most consistent manufacturers of high-end audio components for so long that when they announce a new component’s arrival it almost elicits a ho-hum response. Yes, another new Classe’ Audio product...

www.stereotimes.com

Saw a couple of used ones for relatively cheap?

 

[Count Dacula]

I just bought this... https://www.ebay.com/itm/295547827838


Yes, I actually do own a passive sub, a rare bird these days. That's probably why the amp was under $40, with variable xover and sub out. My unit is an old Polk down-firing 10" dual voice coil which is nice because I can drive it with a secondary set of <stereo>speaker wires from the Yamaha RS-202 that has decent power, but Yamaha cautions against 4 ohm loads.

I torture it with some 2x6" Polk full range, my "garage" system, so to speak. I even ran it with four speakers plus the sub, lol. I could buy all new equipment, but like the idea of maxing out the usage of my old stuff. This is one way to do it, breathe a little life into an old goofball system. So, next time I visit my place in NC I have a little upgrade. Not expecting much, but I didn't have to sweat finding the right unit/price point, it is what it is. I am cheap and have about ten systems to feed.

 

[tom_tom]

Topping MX5 is missing

 

[Vhond]

Nice listing (and hey they also mention my Mueta ; ):

Class D for home application

 

[theREALdotnet]

I just bought this... https://www.ebay.com/itm/295547827838
View attachment 396253 View attachment 396250

Yes, I actually do own a passive sub, a rare bird these days.

I've got a similar one (Nobsound G2 Pro with TPA3255D2 chip), it revived a Velodyne subwoofer with a dead plate amp. Better than ever.

 

[syswei]

Bryston BD-225 and BD-325

https://support.bryston.com/downloads/Brochures/Bryston_Class_D_Brochure.pdf

hefty peak power, according to the specs at least

 

[Vhond]

Very curious why they have chosen for a digital variant instead of an analog technology?

 

[VMAT4]

Very curious why they have chosen for a digital variant instead of an analog technology?

Class D amplifiers are analogue. The D does not stand for Digital. Class D amplifiers work through Pulse Width Modulation.
Just check WIkipedia to get started on the topic.

 

[Vhond]

Class D amplifiers are analogue. The D does not stand for Digital. Class D amplifiers work through Pulse Width Modulation.
Just check WIkipedia to get started on the topic.

I know as long as Class D amplifiers exist... But from the Bryston Brochure:

The audio signal is first converted into a digital format by an ana-
log-to-digital converter (ADC). The digital signal is then pro-
cessed by a digital signal processor (DSP), which generates the
PWM signal based on the input signal.

 

[mhardy6647]

Class D amplifiers are analogue. The D does not stand for Digital. Class D amplifiers work through Pulse Width Modulation.
Just check WIkipedia to get started on the topic.

Actually, I'd encourage Class D neophytes to go back to early literature, which should make it all easier to understand (at least it does for me).
Not that it's all that hard to understand, though!

I - ahem - collected a list of pertinent references a while back, mostly because I like history and context (and I have too much spare time -- sometimes).

Class D (PWM) amplifier archaeology

So, I'm a scientist, not a historian, but I am still fascinated by history... and I crave context. You all know that the late Sir Clive Sinclair is regarded as the purveyor of the first significant PWM amplifier products for audio. https://www.vintage-radio.net/forum/showthread.php?t=81139 A...

www.audiosciencereview.com

 

[jeroboam]

The list of known class D amplifiers is fairly complete without listing every pro amp or models on Alibaba or wherever those things are. If you can look over the list and see if anything comes to mind that is not on the list that would be great. Thanks.

ASR list of known class D home audio amplifiers.

Any suggestions are welcome. Post suggestions here. I will gather the details and add them. Thanks. :D This will be organized as results come in. So give me brand names and model numbers of class D amps and I'll create the list just like the EQ/PEQ webpage @ ASR is done. 3E Audio 260-2-29A PFFB...

www.audiosciencereview.com

Thanks for your continuing hard work in compiling this list Doodski. I would suggest adding Rouge Audio Design to the list. They are based in Italy and build some gorgeous amps using Hypex, Icepower, Purify, Powersoft and Pascal modules. The range includes a cheaper Studio series and a more upmarket and pricier Alauda series of power amps.

 

[pogo]

Marantz Model 10
Adapted Purifi 2nd generation, based on 1ET9040BA

 

[MoreWatts]

Axiom Audio in Canada, generally known as a speaker-maker (and the owner of/is owned by Bryston?) lists 3 class D amps on their site. They don't list the modules used, and they all use a toroidal power supply, so they are all >20kg. The 2 cheaper amps put out 125W into 8R, while the more expensive one is 225W. The prices (U$) are shown for 2-channels. All 3 amps can be configured for up to 8 channels. I don't know how these compare to Bryston amp models. The design seems like ATI amps (Class D + toroidal PS).

The cheapest amp:

The priciest amp:

 

[Vhond]

Is it correct I didn't see the Elipson A2700 (https://en.elipson.com/product-page/a2700) in your listing?