CLASS D MONO AMPS buy ATMASPHERE MUSIC SYSTEMS

@kuribo In most class D designs, the distortion sources in the design are caused by dead time and non-linearities in the encoding scheme. In our design these result in lower ordered harmonics- its not been tailored.
 

There are many sources of distortion in class d amps, not only those you have mentioned, but also in the output filter. Do you use post filter feedback?

Please share some measurements of the frequency response with load, THD+N with power and frequency, FFT's and IM. Also, can you share the switching frequency used? Lots of claims made here (not all by you) so it would be enlightening to see a more complete picture of how this amp performs in actuality, not how it sounds to those who haven’t heard it yet.

@kuribo a large segment of the market likes state of the art design, excellent objective performance, as well as a neutral and transparent sound.

Slightly circular I think, because those words define the "market" as being those who like state of the art design, excellent objective performance, as well as a neutral and transparent sound. That is actually quite narrow, by my reading, and so large segment is correct but moot.

My own definition of "market" would be substantially wider, and would include other variables, without necessarily excluding those mentioned. Perhaps a different weighting scheme, for as is conceded, everyone has different tastes.

Perhaps by choice like yourself, or for other reasons.  Irrelevant.

Slightly circular I think, because those words define the "market" as being those who like state of the art design, excellent objective performance, as well as a neutral and transparent sound. That is actually quite narrow, by my reading, and so large segment is correct but moot.

My own definition of "market" would be substantially wider, and would include other variables, without necessarily excluding those mentioned. Perhaps a different weighting scheme, for as is conceded, everyone has different tastes.

Perhaps by choice like yourself, or for other reasons.  Irrelevant.

 

My comments don't define the market in its entirety- I am simply noting that there is a great number of people in the market who like state of the art design, excellent objective performance, as well as a neutral and transparent sound- in other words, objective and subjective criteria are of importance, not just one or the other. The success of Hypex and Purifi, both commercially and critically, attests to this market dynamic.

I couldn't care less what others think of the sound of this or any other amp. What matters to me is my own opinion, in my room, in my system. The rest is simply noise. I want an amp that outputs a signal as true to the input as possible, only larger. I appreciate good design as verified and vetted by measurements as do others.

@kuribo From the website -

The Class D amp has the same kind of distortion signature {as tube amps}, but at a much lower level.

This, to me, is reasonably unambiguous. From what I understand of Hypex and Purifi (and others, of course) amplifiers, they make no such claim about harmonics. I suspect measurements may confirm this. I’d bet on it.

I’m as concerned about the definition of the market as you are with your amplifier preference. "in the market" would be the worldwide production and sale and availability of stereo amplifiers. Within this there are many other more narrowly defined markets like an overlapping mess of circles on a page, each with their own and overlapping characteristics.

So the "great number of people" must be taken in this context.

People, forget about Hypex, Purifi, et al.

The obvious point of comparison/competition here is the AGD Tempo di Gan.

Consider this.

Atmasphere: proprietary GaNFET module, 100W into 8, 200W into 4, $5400.

AGD: proprietary GaNFET module, 100W into 8, 200W into 4, $5500.

If anybody could get both amps in the same room at the same time, then they would really have my attention.