Unless you listen at very loud levels, say 85dB or higher, your amp will operate in class A most of the time.
The first watts
Okay, let's see if I can ask this question correctly. If you have an class A/B amp and the first 10 Watts is class A and after that it's all class B what happens if you have an inefficient speaker, do the first 10 W get used up real quick so that you're almost never hearing class A amplification, or does it work differently than that?