the bose are normally 2ohm so they can get more power out of them with weaker amp power. if your not happy enough with them the only real way to go is ripping the bose and amp out, and replacing them with some aftermarket amps/speakers. you can still keep the headunit if you want, but i would recommend something that will smooth out the signal and provide you with easy rca's. either a simple line out converter or a nicer DSP unit (JL cleansweap, RF 360, JBL-MS-8, Audio Control, Audison Bit.1)