ok so my acura bit the dust, now im driving a 99 Volvo C70 turbo, i put my Alpine 12"s in it, but i kept the stock HU and just used a high to low level output for the subs. now i just bought the Alpine CDA-9856 deck, i wired it up, plugged the harness in and i got power but no sound, i was clueless so i called my friend from tweeter and he told me i had to bypass the factory amp....i dont really feel like having tweeter or best buy do it so i wanna figure out how to do it...anyone know anything? thanks