Class A Power in A/B amplifiers?

Most "high biased" >100w amps are around 5w Class-A,
Unless you go Gryphon Antillion which has 3 X switchable bias up to 100W!!! Class-A and is 150w A/B

The Class-A heat factor "goes up exponentially" the more Class-B you have.

So two amps both with 5w of Class-A each.
One is 50w-a/B the other 200w-a/B. The 200watter will be 4 times hotter "at idle" than the 50watter even though they both only have 5w class-A.
Hope that explains it??

Cheers George

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.