The difference if fairly simple. Class A amps run at full power all the time. Class B amps run 'on demand'.
Class AB amps usually run in class A at lowest power, then switch to class B at higher power.
Whether one is better than the other is hard to say, largely it depends on the individual design.
Personally I use 30wpc Class A tubes and it, to me, is far superior to anything I've owned in an AB design. But that's just my opinion.
Class AB amps usually run in class A at lowest power, then switch to class B at higher power.
Whether one is better than the other is hard to say, largely it depends on the individual design.
Personally I use 30wpc Class A tubes and it, to me, is far superior to anything I've owned in an AB design. But that's just my opinion.