Originally Posted by Erod
My two cents.
Today, AB is better than D, especially if you have a medium to large dedicated theater and need true theatrical sound, or you're trying to drive authoritative 2-channel music at high volume.
In a living room setup or small room, the good Class D amps work very well from what I've heard. But if you try to drive big speakers for big sound, they get very "digital" sounding. They aren't musical enough in those applications.
I much prefer the beefy, heavy and musical sound of a good AB amp. There will be a day when Class D, or some other class, can match them in performance, but not today. They're about 90% of what a good AB amp is, in my humble opinion.
Is there any basis for these statements? Amp topology and design doesnt matter - all amps are going to sound the same when within their operating margins, i.e. before they clip.
There's no such thing as 'digital' or 'musical', all these terms are audiophile nonsense
An amp has one job - to amplify the input signal. its not supposed to change the Fr or color the sound, but some (like tube amps) do because they don't handle full range, and people start liking this sound, its no different from a DSP mode in a processor.
A digital class D amp will be lighter, consume less power, generate less heat and be be far more efficient - in other words, better in every respect. What it will not be is heavy and big - and those things are seen as a sign of 'quality', again due to all kinds of audiophile bias.
The industry is very heavily invested in selling the traditional products and any technical advances are ridiculed because they threaten the usual companies.