@ Effy
Hi, just noticed your sig. boostes are bad, they are amplifiers with extra components to knock speaker level down to transistor input level.
Get a head unit with RCA or DIN outs only, save money & plain amplifiers, no extra components, save money. all this wil insure that you don't amplify the distortion comming from the head unit amp.
Chris
PS: I thought it was Bilsey too. But please, do we need to bash him. He's an OK guy!