please help..2002 325xi

[thequietstorm]

my story.. i installed a after market amplifier. the speaker wires from the amp got grounded to the amp causing the rear speakers to not work.first it sounded like the speaker was blown, but they were fine. then i thought it was the radio i had it replaced with the same factory radio. but that didn,t work either.. just to remind its just the rear speakers thats not working front speakers works fine. then i thought it was the factory amplifier but it was not. its not the radio not the speakers not the amp.and the wires are not touching each other..so if someone can give me any infor please help me out. am lost without sound in my car..my email thequietstorm11@msn.com.... and its a bmw325xi 2002...