Class A Power in A/B amplifiers?

believing that Class A was the SHIT! ... But I came to find that slew rate & wide band frequency response under punishing conditions is a far better resume

You can't state that unless it's the same amp your comparing the different Class-A bias with.

You also need to listen to the same amp (Gryphon Antillion) as I stated above with all those parameters you mention, but that is switchable in Class-A biasing low med and high, and then state it doesn't matter much, if it's in high class-A bias compared to low or even medium.

Cheers George  

What I meant to say that my own ears have yet to discern a preference of Class A over Class A/B or even D which is even moderately consistent.

:) This is an entirely different issue! If the amp has feedback, you'll probably not be able to tell anything about class A or AB. If the amp is zero feedback you will. Most amps that are class A or AB and run feedback simply don't run enough, so you'll get artifacts on that account (usually brightness and harshness caused by distortion). Pretty hard to tell which is which when that issue is overshadowing things.

Well, @atmasphere read my previous post and responded appropriately while @georgehifi seemed to have ignored the point I was making, which is about audible benefits and sticks to cherry picking statistics which he feels must prove his point.

As I’ve mentioned like, forever: a measurement is not audible nor a preference. It’s just a number.

To be "better" to me it has to sound better. Otherwise it’s either equivalent or worse. We can argue that 0.01% THD is better than 0.03% THD, given equal harmonic distribution of the distortion, but you can’t prove one is audibly better since I assure you I cannot hear it.

And so, I have yet to hear evidence that any amplifier class is inherently superior all by itself. Even @atmasphere starts to get into feedback vs. non-feedback which occludes the entire discussion over amplifier classes. I might induce he’s saying feedback is more important than amplifier class. :)

I am going to state, categorically and forever that brand names are more important than amplifier class and that everyone who argues otherwise is a muggle.

If the amp has feedback, you’ll probably not be able to tell anything about class A or AB.

@georgehifi seemed to have ignored the point🤦‍♂️

NO! this is bad information and definitely not correct
I have built many Class-A’s (even a massive water cooled one), I and friends could tell if they were in low bias or high bias, with feedback applied, using global or local, and using matched complimentary outputs.
And if you don’t believe me ask Nelson Pass one of the foremost Guru’s of Class-A amplification that neither of you could hold a candle to, he’ll set both of you straight.