I see. Thanks for answering my question. Many people say that the class D topology is the future of amp designs. I marvel at the compact design and efficiency of those amps though I'm not quite sure how they stack up sound wise to the old designs.
You're welcome, sir. Just like conventional linear amplifiers, there are good ones and there are bad ones.
Mark Levinson, Roksan, Lyngdorf, TaCT, NuForce, NAD, PS Audio, Peachtree, Jeff Rowland, Bel Canto, Vazari Audio, Wyred4Sound, Wadia, Sonneteer, Anthem, Bryston, Spectron, Sonos, Meridian, Primare, Audio Research, Pro-Ject, Cary, and so many others are dabbling with Class D because of the advantages that you mentioned. I don't think many of them would risk their reputation with a poor product. The mainstream Japanese and Korean brands are also onboard for the most part.
Full-range Class D is gathering quite a bit of support in the mobile audio environment. Cars and portable devices don't have much power to spare, and the high efficiency of Class-D devices make the most out of it (plus of course it makes the devices more compact and cooler-running).