verdict on class D amps?

PHD - do you call Switching power supply (SMPS) "Digital Power Supply"?

Proper term for these amps is "Switching" or "Class D" (there is nothing digital inside)

It depends on your taste which will be determined by your ears and what your brain's sonic preferences are. I have listened to tube amps (Music Reference), hybrid (Audio VanAlstine 250 wpc Fetvalve 550, and class A solid state monblocks (300 wpc Sheng Ya). I also have listened to the Wyred 4 Sound 125 wpc amplifier.

Here is what my ears said to me when I switched out the Music Reference tube amp for thw W4S amp. The W4S amp is smooth, very smooth, silky smooth - almost unnaturally smooth. The sound is very clean but not as big hipped as the Music Reference. Can't say much about the bass as I was running a subwoofer on a pair of bass shy speakers, the Spica Angelus. It is just a very different musical presentation that my solid state, hybird or tube amps and since it has, to my ears, a distinct sonic signature it won't be flick everyones bic.

I like the W4S sonic signature. My amp is not fully broken in so it may get better. It is pleasing to listen to though different.

Jaymark - that was my impression. SS integrated, I had before class D amp, sounded in comparison "brassy". I'm not sure, with my limited experience, how best amp should sound, but I have very liquid smooth sound now. Sibilants, I had before, disappeared and clarity/transparency got better. One thing I noticed was that sound got leaner at lower midrange. I replaced speaker cable (AQ Indigo) with better one (AZ Satori) and the lower midrange got much fuller.

Kijanki, lean in the mid-bass is, I think, what I was getting at when I said that is was not as big-hipped as the Music Reference tube amp. My W4S amp is not fully borken in but it is on the silky, clean, but lean side of musical presentation......

I hesitated between AZ Satori and some other cable until I found few reviews that complained about a little fuller lower midrange - that was exactly what I needed. AQ Indigo was, in comparison, very thin sounding. Satori is not only more refined (clarity) but has very pleasant silkiness on the top.

As for breaking in - it goes thru "stages" (as any break-in) for very long time. My small Rowland 102 stopped at about 500hrs or at least I was unable to detect anything - so be patient. It becomes a little less "forward" and more refined/musical.