Many a/b amps operate in class A for the first 10 or 20 watts only. After that they are in class B only. (some verify this please). If you listen quietly, it may be noticable. The downside of pure class A amps is the heat and usually a lower output rating.
Therefor, if you don't really care about class A, then a class A/B amp won't matter anyway and a Class B is all you need?
Therefor, if you don't really care about class A, then a class A/B amp won't matter anyway and a Class B is all you need?