I'm guessing its the RCA's? I am using 10 year old monster cables.. so those might be degrading? I know the grounds to my amps are fine.
Here is my hardware.
Speakers: Kicker KS600 6''
Subwoofer: Rockford Fosgate P3 12'' Sub
Tweeters: Sony XS-H20S
Head Unit: Sony CDX-GT630UI
Amp: Pioneer GM-D7500M/Kicker DX 200.4 4ch
Distro Block: Monster 4 to 8 guage (4 inputs)
Installbay 4 gauge wire
Monster RCA's (10 years old)
Various speaker wire
Any input would help me a lot, thanks!