Copy/paste of my opinion when asked on diyAudio:
I do not know why the Veritas amps sound so good, my NC400 amps were put together very basically and still sounded the best I had heard.
As far as the snickering about price and subtle differences, perhaps I should put my opinion in context. I do NOT hear the differences (improvements?) from things like connectors, metals, pebbles and so many of the other tweeks that I read about. I remember a rather uncomfortable time when a fellow was demonstrating Shakti Hallographs in my living room, exclaiming "Hear that??? Do you hear that?!!!". I didn't. While curious I also remain VERY skeptical of processes like quantum tunneling using 2,000,000 volts tesla coils for fuses.
That said, the Veritas amps completely redefine my ideas of what my speakers are capable of. I listened to everything from internet radio streaming to SACDs directly from the BD player to the amps. Add the efficiency and other attributes and I am thrilled.
Oh, other amps I've recently owned were Parasound JC-1, CJ LP276M and the NC400s.
So, the sound... All the buzzwords, I guess. Deathly quiet, palpable room loading, unbelievable low end control, amazing detail extraction without stridency, terrific separation of musical lines while still naturally blended, etc.
I also want to say how impressed I am with the physical construction, feels like a solid slab of aluminum, internal layout is clean and gives the modules the best possible environment.
Finally, I do plan to see if I can tell the difference when I install Quantum SR20 fuses next week, currently the amps have stock NC400 fuses in them. I almost hope I don't (I wonder if that sentiment will affect my perception?).