I had a friend over, very knowledgeable in hifi. I wanted him to diagnose a hum that I had.
So I put a select an empty input on the preamp and turn the volume to the max. I didn't realize that music was still player in my other input so when I selected it we got a very unpleasant surprise.
The speaker did survive it and it was instant burn-in. I got freaked out for a while.
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