Hey sorry guys, been awhile since ive been on the forum. My audio lines are all done solidly. using minimal cable, rcas run opposite power, short length of ground to a reliable spot. Thing is though that the interference goes through all speakers, not just the subs. I did the big 3 last night, (still working out the kinks on the alternator line) and the static seems to be lessened but not entirely gone.

when i have some cash flow again ill give the ground loop insulator a shot, can anyone give me an estimate on cost? ps. i tried the ferrites mentioned early on in the thread to no avail.