here is how i have everything set up as u can see i dont have the amp and cap ground to the chasis could this be why i might have a ground loop i could make them all seperate grounds or i can tell him to buy a ground loop isolator and he only has 1 amp hes just running component speakers but hes also running one of these behringer 15s http://www.amazon.com/Behringer-B215XL-Titanium-Speaker-Standard/dp/B002P3RYXG that is hooked up to this for power i have that thing hooked up to the battery and them rcas go from the headunit to the amp to the behringer its sounds good except we are getting the noise