Competitive class D amp suggestions

BlueSound PowerNode.

2nd and 3rd harmonics pretty much same level.

Well my dealer tells me "soon" that he will be receiving his pr of the Atmasphere Class D amps for his own showroom, then off to interested customers. I've heard this for almost 3 months. I understand production issues but still always the same thing. Time for me to move on sad to say.  

Ralph your tutorials are helpful!  At lease i understanding now better what is or can be happening with the sound delivered by audio equipment (why knows about electronics may also understand why is this happening). I still am not sure about some basic things. Now i suspect that the "higher order harmonics" are not second and third order  harmonics but 4th, 5th etc order harmonics (just to clarify, in my earlier posts i referred to "higher order harmonics" as the second and the third order ones!). Do 4th, 5th etc order harmonics also exist? Is the goal then to suppress 4th, 5th etc order harmonics with the second and third order harmonics, or also suppress the first order harmonics ? Why a high distortion in the first order harmonics cannot suppress the  4th, 5th etc order harmonics?

Independently of what is the answer, it is clear that an average of  some order harmonics and hence THD makes no sense (see my earlier posts) merely because it does not take into account the rules of acoustics.  

This allows greater transparency (since distortion obscures detail) yet the same kind of smooth mids and highs you associate with a really good tube amplifier- IMO, the best of both worlds.

I did not understand that. Are you saying that by obscuring the details greater transparency is reached ? 

@twoleftears this diagram, a proof of a nearly the same behavior of the  second and third harmonics is nice to see.

I still am not sure about some basic things. Now i suspect that the "higher order harmonics" are not second and third order  harmonics but 4th, 5th etc order harmonics (just to clarify, in my earlier posts i referred to "higher order harmonics" as the second and the third order ones!). Do 4th, 5th etc order harmonics also exist? Is the goal then to suppress 4th, 5th etc order harmonics with the second and third order harmonics, or also suppress the first order harmonics ? Why a high distortion in the first order harmonics cannot suppress the  4th, 5th etc order harmonics?

Let's be clear about something: 'masking' is where a louder sound (like a 2nd harmonic) can obscure a quieter sound (like a higher ordered harmonic). "Supress" suggests reducing the harmonic. So the lower orders do no suppress higher orders, but they can mask them if their amplitude is high enough in relation to the higher order(s) to be masked.

The higher orders are the 5th and above.

Are you saying that by obscuring the details greater transparency is reached ? 

No. I am saying that with lower distortion there is greater transparency; distortion obscures detail.

@twoleftears Interesting. That 18th harmonic (9KHz) looks increased. There also appear to be some intermodulations present (inharmonc; not positioned directly on a graticule or directly in the middle of two graticules). 

@niodari The first harmonic is the fundamental frequency of the note itself.  So that's the big spike to the far left.  Thus the other harmonics begin with the second.

The reason why the same note/frequency played on a violin and a clarinet sounds different is--simplistically--because different instruments produce different combinations of harmonics... rather like different models of amplifiers!