POT - Potentiometer (volume knobs, one for main, the other for Sat. or Sub ?)
About the satellites, I meant you just loose sound (not blown) 'cause you loose the
signal fed to amplifier which power them due to dirty or worn out wiper on the POT.
I forgot, make sure to remove the plastic knob to be sure the cleaner gets inside the
body of the POTs when you spray.
Get your spray, 99.99% solved.
Hope this will clear up.