Why do I like Class AB better than Class A?


So I just purchased a Plinius SA 100 MKIII, and have had 2 listening sessions comparing both with the toggle switch. To me clearly the AB is more detailed and focused, the A is warm but a little fuzzy and bloated, although I would give it a slight nod on just vocal songs. Am I just not use to the sound as this is my first A amp or have I not let it properly warm up for class A (1hour or so).
Don't get me wrong, i love the amp, great bottom end slam but I don't hear the holy grail from Class A. Thanks in advance for the input guys.
barfbag

Showing 1 response by unsound

FWIW, when comparing Threshold model amps that had similar chassis, though with differing bias, etc., that were sold as different models with either Class A or Class A/AB (Class AB) output; other than running hotter and with lower total power output, the Class A amps were smoother and more laid back, while the Class A/AB (Class AB) amps ran cooler, had more total power output, were more dynamic and more upfront, though not as suave.
Depending on the speakers, the room, preferred live musical event seating, sonic priorities, and of course budget, I could imagine different people having different preferences.
FWIW, I'd prefer the best of both worlds, cool running, dynamic, neither laid back nor forward, suave sounding, Class W hatever. So far it's typically been high powered Class A amps that have come closet to most of those ideals (except of course for the heat, which I could most easily make an exception for), unfortunately the costs of such amps have just as typically escaped me. High biased Class AB amps have so far become the prudent choice, at least for me. YMMV.
Class D might change all that, we shall see.