I've got a hum in my Sunfire sub.....


....I've tried changing cables and plugs. I'm running it with the RX-Z9. Any thoughts? It's a hum that there when the RCA in is plugged in off of the front sub out.
gulfregulator
I had a boston acoustics sub once that would hum if I bumped the RCA cable end hooked into the sub itself. Bumping it again or shaking it would make it good with the world again. I wish I had a more scientific reply, but you never know.
try buying a grounding plug on the end that converts the 3 pin from the sub to a 2 pin for your wall. Often the ground pin causes the buzz.

JWH