Ok I have the WORST ground noise ever going on..... Here is what I have and have done to try and fix, I'm looking for any hints or someone to point out what I have forgotten to try..
Ok it's an 03 ford explorer with awd and the flex fuel 4.0
system is Alpine cda-105, cadence ultra drive 600 4 channel, and 2 sets of infinity 6.5 components (cant remember model number) Knukoncepts 4 gauge power and ground both ran to bat, big 3 done with 4 guage knu. All on stock alt since no subs are being ran...(wifes car, she sucks) Monster cable rca cables.
Ok now i've tried to ground the rca's, also tried to run ground and power straight to battery, replaced alternator, ran ground about 6 inches from amp, and now i'm out of ideas and this is by far
the loudest most annoying ground noise EVER.