Dumb break in question...

Uber: Actually I think the patent office is slipping - they approved one recently for a case lot bulk buy of tweeters that is comical

but, what do I know ? Every patent  I was involved with I signed over to my employer.... in return for my freedom at 55

Ah, the Test(y) CD Burnin' 'rack... (As introduced @ Burning Man to an ecstatic hoard....) 

I love the smell of hot polycarb' in the morning....😒

And the Overachiever Award goes to.....

 FWIW, any time I see conflicting answers I go with Al !

Because turn the amp off, now you are back to the same situation where the circuit is open and nothing is happening.

Thanks, millercarbon. Set my day off ROTHFLMFAO!

Al is 110% correct, as usual.

expose it to a powerful magnetic field and then take that field rapidly away.

That is a certain way to magnetize something. Any analog tape op knows that you remove the signal slowly to flatten the field lines. If one recalls science class, we passed a DC current through a coil to create an electromagnet. If AC current created a magnet, transformers would attract steel tools. They don’t.

Watches are demagnetized by placing them in an AC field.

There is next to ZERO magnetizable material in an electronic path: copper, brass, lead, tin, silver, gold. AND the µA of an audio signal won’t do diddly.

Perhaps Mr. Carbon’s moniker is really MrConfirmationBias?