Class A Power in A/B amplifiers?

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.

Hey Abraxalito slumming it again??

Cheers George

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/ 

George - yep, and the old torch bearer is yapping at my heels! Eeeek!

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.

No. If the amp is only 1/4 or 1/2 watt before it goes into B operation its still considered class AB. Some amps out there have what is marketed as 'enriched A' operation where they have 20% or so of full power in the A region, but that is only marketing; such amps are still considered class AB. There is no such thing as 'A/AB' unless there is a switch to differentiate the two.