That's correct - I currently only have power going to the sub and I get the rumble noise. Adding the RCA cable just makes it worse (with added hum I think) frown

I have a different RCA cable from Axiom as well... but since it happens without the RCA cable connected to the sub I think I need to get the rumble corrected first.

Thanks guys!

Last edited by FuzzyLogik; 06/01/13 08:55 PM.