need help with my audio system... i changed everything from speakers to head unit to sub... still sounds like ****, 94 ls400 nakamichi sound system is what i had. does the amp power the doors as well? for what i knew it doesnt. but i read again that it does for the 94 nak systems..? is it the naks that have a phone? i didnt find a phone in my system so i guess mines doesnt. anyway can anyone give me info on what i might be missing. played the cd in another car and it sounded better. someone help please