I can't imagine that the sub is doing it. I can't think that an over load on the circuit would blow the fuse in the lights. It would blow the circuit breaker. I am sure the plug on the lights are polarized so you can't try turning the plug 180 degrees and see if it is a polorization issue. Does it occur as soon as you plug the lights in or as soon as the sub comes on? Do you have a surge suppressor that you can plug into the shared outlet then plug the lights into the surge suppressor?
