I think you can get about 10 or 15 watts of class A out of most big Amps before they switch into A/B in solid state.
Is there a way to determine how many watts an A/B amp is biased in Class A? There are instances where you can't ask the manufacturer.
Also, how do you determine how many watts you normally listen to? Not sure I asked the question correctly.
Finally, if an amp continuously see-saws from Class A to Class A/B and you can't tell when that change occurs, then why does Class A supposedly sound superior?