How do Digital Amps Mfrs. compare in sound?

I doubt very much that in two yrs ,that so much of an improvement has been made in dig. amps that all of a sudden they have improved that much if any and just how much of a improvement was made.2 years ago there was just as much hype as now.

Of course I empathize with you Coffeey. . . it is really sad how things have the habit of being. . . and even more of changing and evolving. . . in spite of our better doubts, nostalgia for the safety of olden days, or tradition abiding skepticism. . . It's like we don't matter any longer to this mad mad World. . . 'Fore long we'll have to get out of the house and listen by wesselves to what's good with this hobby. . . because even the old tried and true "I truly believe it therefore it's true" does not sound so hot any longer among far too many young whippersnappers. . . there's no more Religion no more, I tell ya.

My very last refuge is in the stern wisdom of one of the greatest sages of our Age:

"Just don't fall into the category of those whose minds, like concrete, are thoroughly mixed up and permanently set"
RODMAN99999

Regards, G.

Guidocorona, you're a piece of work. You hear angels don't you? I know the "Consciously Guided" when I hear it. I'm going to start calling you "YODA of HIFI." ;)

hmmm, me thinks last time I heard 'em voices I was 16. . . right in the middle of the Sturm und Drang of adolescence. . . now I'm only a crotchety old prankster foolin' 'round with words and audio components.

Hi Coffeey, small design improvements can make large changes in sound quality in any design. Class D amps have always been good, maybe not great but good. UCD in the last year and a half has redesigned their boards and have chosen some better components. Class D amps use allot of surface mount parts and that is the reason most companies buy modules from B&O (ICE) or Hypex (UCD) and then design and build their own power supply. Now that class D production has picked up, many surface mount component manufacturers are willing to set aside the better parts for these designs. Most, if not all of the sound differences between tube and solid state amps are the parts and power supply. The same applies to Class D. Circuit topology for tube and solid state haven't changed much in decades. So how is it possible for a manufacturer of these amps to make their product sound better then last years or even 10 years ago? Parts, board layout, isolation and power supply.