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[Random_Stranger]

It never really did that before, can anyone tell me what that means and how I can fix that? If I undo my seat belt, sometimes that breaks it but it comes right back, or if I lower or raise my window.... It's the craziest thing, but I hate hearing it when I accelerate thinking I got a supercharger or something. It's really annoying.

[rave2n]

Running the wires together will have no effect on the audio quality being you used well enough wire. You guys can argue it with me all day, but what you hear from hesayshesay is not going to add up to what I do on a daily professional basis. I work with 500x more power in a high RF environment, as well studio environments. Just don't use cheap wire, or get a shielded set for you RCA connection and you won't have the problem. Even though your issue is not from that, it can occur on a extreeeemely rare basis, or for some odd reason you purchased a 3 dollar set of RCA's with no shielding whatsoever.

You issue is grounding of the head unit as others have stated. You can acquire a filter for this problem, or you can run seperate grounds, or combine the amp ground and head unit ground to one central location farthest away from the hood. Its realitively simple.

For those would like to argue further cause i know you will, being ignorant and all.

I wired up the audio for our remote broadcast vehicles, vans specifically. Each has 2 head units, one for internal monitoring, and a second seperate system that resides within the back of the vehicle. The rear is the one I want to speak of, it is powered by a 12volt variable power supply off the battery, or external power via switch. The power supply pushes 4 10 inch speakers, 3 12s, and couple 3 ways, a 20 inch TV, PS3 and 2 800 watt 4ohm amps. All wiring is shielded, all connections are soldered and shield butt splices. The audio is crystal clear. The part that might just amaze everyone is....the audio and power wires, are heatshrinked into one big bundle.....