Curiousjims' suggest is the safe route, unless you've a soft touch with the pliers. Fastest cure(s) I can agree with.
I've XLR mixed w/RCA with no noises, so no comprendo....*shrug* Maybe a ground gremlin in dere, somewhere...
Hey, 2 faves in the same state, love it....*G*
Dust off those subs.....;)