So got an alpine x305 installed in my car, then realised the sub and amp RCAs were installed(by previous owner or prior) to the rear speakers :s
so spent today laying RCAs through the car and rewiring the rears and sub/amp, good fun it was
question though, its a two channel amp with two inputs, line 1 and 2, so how should i be plugging up the two rcas from the hu into the amp?