Who tried Class D only to return to S/S or Tube

2nd generation is already here. Ableteck, Pascal and Hypex are all making 2nd generation class d amps that are competitive with nearly anything ss or tube based at less than ridiculous prices.

There is no issue with the switching frequency nor the filtering in these modules. None of these produce any audible distortion products at the tweeter. I have heard all three. They are all excellent and have been well reviewed.

Have you heard an Ncore, Pascal, or Abletech based amp? I have. They have all been reviewed very positively with no complaints about switching frequency artifacts. Perhaps future products will operate at high switching frequencies, but that is no panacea as high rates introduce other issues. Read Putzey’s papers on class d design. He addresses switching frequency. With the audio quality attained with these modules, your switching frequency concerns are a solution in search of a problem....

I have answered your question already. Reread above...