Class A Power in A/B amplifiers?


Is there a general industry standard for the amount of Class A power in Class A/B amplifiers?For instance SimAudio has always touted that they run Class A for the first 5 watts.Curious how other higher end manufacturers approach this..
freediver
The class A power for a classAB amp is a function of the standing bias current in the output stage. But also relevant is the load impedance - running with 4ohm speakers will halve your classA power compared to 8ohm.
I'm not sure whether there are "industry standards" of this kind for audio. Much of what I've read on audio forums, reviews, etc. do not point back to such, either governmental (à la the FCC) or professional.
I have experimented with different bias currents in my Class A/B Integrated Amp and found that higher values provided significant improvements in sound quality, especially at low volume. Heat buildup becomes a limiting factor.

The "Leaving Class A" article by Nelson Pass may be of interest.

https://www.passlabs.com/technical_article/leaving-class-a/