Class D Technology

Somehow people cannot comprehend that class D amp is purely analog and switching itself is inaudible. Switching is present all the time - even without input signal. Place ear against the tweeter and you will hear very low typical amp’s hiss - likely much less than with any class AB amp.

That wasn’t my experience between a Spectron Musician III mk2 (Class D) versus a Sanders Magtech (Class AB). Although the Spectron is quiet, it’s not as quiet as the Magtech. Both are inaudible at the listening position though.

I think I can tell if the amp I’m hearing is Class-D or Class A.

In my experience, Class-D always makes me think, "hmm, nothing wrong. great sound!", and a good Class A makes me think "how you can do this? what’s going on here!". Cheap class AB’s has a typical glassy haze, but I have never heard the same thing with cheap Class-D.

I own Class-D from Spec corporation, it sounds clean, plenty power for 50 watts, taut bass, smooth high, compact size........, however I just  don't get connected to the music as opposed to 'tubes' amps
The magical sound is only from 'tubes' ... that for my ears

Great discussion and lots of valid points. I agree with those who feel Class D is not ready for prime time - great for PA and subwoofers but perhaps a few more years are needed for them to become viable to the majority of critical audiophile listeners. The black background many listeners can hear with Class D indeed suggests the heavy filtering is in some way affecting the audible sound. 

Class A particularly when no NFB used tends to have a somewhat warmer sound.

I have not heard Class D that I would call an inherent warm  sound, in fact not warm at all, however if a touch of warmth  is what one seeks a tube pre-amp upstream can help accomplish the goal.   The ARC sp16 I use with BC ref1000m amps does this to perfection through my very neutral sounding OHM Walsh speakers.   Tweaking of ICs and such can even make a useful difference here.

Hifi is like making soup.   You gotta toss all the right ingredients in the pot together to make it tasty for you.    Class D is a very good base to make your soup with IMHO.    Where it goes from there YMMV.