Above I said the performance of even the best of class D amps will vary widely depending on associated components.
In my own system, my sound has run from dark and moody, to extra warm and bold, to spacious and airy, to now, well balanced throughout the frequency range of 20 to 20k, detailed, delicate, powerful, sweet; just where I want my sound to be. Imagine, that variation using the same amps all the time.
That is why I want to know every wire, tweak, and component any negative reviewer has before I believe he is giving a class D amp a fair hearing.