Thx Lars.
I've been led to believe from my experience with QSC and other proaudio amps, that advanced DSP isn't needed to perform the soft clipping/compression I measure in the amps.
I have three QSC amp models using AB, one using AB/H, and one G. None of them have internal DSP other than whatever circuitry is used to perform the soft clipping/compression. The AB models have been around for decades.
Every amp channel in all models has its own independent limiter with an on/off DIP switch. This includes relatively low cost, lower power 8 channel amps (Class AB 130W FTC @ 4 Ohm)
So I've figured the circuity is rather standard, easy to implement stuff, in generic type amps. Maybe not?
(I do know I've so often wished that clip protection and other routine proaudio amp features, such as clip/-10, -20dB level LEDs, delayed on, instant off, DC protect, etc,.... were in my home audio amps. Doesn't seem they can cost that much when proamps are generally much less expensive than equivalent power consumer)