Originally Posted by djPerfectTrip
By what you said here, I don't see any reason why you would dislike class D...Why is class A/B better?
Class D, an old design from the late 50's or early 60's which was for the most part rejected from the hi-fi world and relegated to lo-fi applications only (but has recently been much more common and has improved, some), doesn't have a well defined and nearly fixed frequency response, regardless of the speaker load it sees, as class A/B does.
Some class D amplifiers acknowledge this deficiency, er, "variability", by giving the owner a selectable filter which compensates for the expected high frequency alteration, often with crude and rudimentary positions labeled, "4 ohm", "8 ohm", etc, however this is to pacify the user into thinking it is as simple as that. It isn't (always).