Ok lads still having this interference problem throught the speakers. so i've taken pulled out all the cables to make sure theres no breaks anywhere just trying to get the speakers and 1 amp working properly at the mo. i have 2 amps, a 4 channel pioneer and a 2 channel in Phase, with the pioneer one hooked up, the power light on the amp flickers on and off and no music comes through the speakers just a clicking sound,(engine is off) So i switched amps and tried the 2 channel amp, this had both music and interference, so what im thinking, maybe my car battery is on the way out and the amps aren't getting enough power to work propperly. Any thoughts?