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?