Per amp output noise
I have installed a pioneer HU,Rockford p-44-2,Rockford p-55-2,JL components front and rear and 2 Rockford 12" subs in custom box,I have 3 pair of RCA cables running on left side rocker 1 pair is twisted to the subs other 2 pair are new that came with amp kit I also ran the aux wire and an extra ground wire that I tied from HU to amp grounds,I can't get rid of humming noise when volume is all the way down and car is running.yesterday after taking car apart again I took extra RCAs I had and ran them from back of HU to amps through sun roof and over the car and noise stopped so I plugged originals back in and started car and noticed whe I pulled them out of rocker channel the noise stopped,after swapping back and forth it didn't matter and trying to put them back in channel 1 at a time it did the same thing.
Could all of the new RCAs be bad?
What is the best brand I can run?
What's in that channel causing so much interference?
Thanks in advance