ok i have a dual amp setup a sony xplod 800w powering the door speakers. a digital audio 2000 watt amp powering the two 12 inch alpines in the trunk. ok well when i have just the xplod hooked up i have no whining alternator noise (increase with revs) . if i hook up the digital audio amp everything but the rcas i dont have alternator noise but when i hook them up i do or if i plug the digital audio amp with just the rcas and the remote or the power wire i have alternator noise (more so with the remote wire) if i plug rcas and ground no noise.
right now i have everything hooked up except the rcas on the digital audio amp (so i cant hear my subs)
what do you guys think i was thinking the digital audio amp has a ground problem but what do you guys think about it, is it common or not cuz idk and i havent heard of it.