As has already been stated, the pre-amplifier is as important to the sound of class D. One cannot simply swap out an AB amp for a D. The system must be coherent and matched. I'm fine with my Bel Canto and Wyred monos driven by Modwright tubed pre-amplifier.
Who tried Class D only to return to S/S or Tube
And what were the reason you did a backflip back to S/S or tube.
As there are a few pro Class D threads being hammered at the moment, I thought I'd put this up, to get some perspective.
Cheers George