My beloved KEF Ref 105.2s...
Two wall sockets next to each other, one always on, one switched so it can turn on/off the table lamp.
Plug the amps into the wrong outlet (switched).
Turn off the lights. Oops, the music disappears.
Double oops... turn the juice on right away.
Pop. What is the sound of two woofer baskets bending?
Woofs no longer made. Very rare...
Thankfully just one of several systems so music is still in the air.
Search, find and replace. Works perfectly.
Now have several working spare woofs in inventory..
Oh, well...
Yup, just stuff as George Carlin might say...