What the hell are you talking about?The class D amp is basically A2D and D2A mayhem. Feeding a class D amp an analog input signal will put it through another A2D conversion then another D2A roughly 10 times worse than 2.8mhz dsd (switching frequency of common class D amps is around 250khz).
Amp manufacturers must be paying the reviewers/advertisers a lot of money to continually praise class D and convert Joe Schmomomododo into a D lover. Cheap China boards sold in mass at the same price of heavy-duty class A and AB designs equals big profit margins for class D manufacturers. Hence, it is the "future",