Lee wrote:

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Right, I am now confused. Not that it's difficult

I think the original music source it was tested with was severely over
driving it...

If I feed it a 0.8v pp sinewave from my sig gen it doesn't clip at full
volume and doesn't go into protect.


** Are you using a dummy load ?

Please describe.



Other than it being a touch quick to go into protect, does this sound
like it's actually working properly? Or at least as it was designed?


** Depends on that mysterious load.


Where it's normally installed, it's paired with some very expensive
speakers


** And we are not allowed to know their identity either?



*assuming my sig gen is accurate, of course.

** Your scope should be accurate enough.

That a secret too?

..... Phil