kenwood radios will shut off audio if there is a blown or grounded out speaker connected to it (safety feature) if you own a digital multi-meter check your speaker leads at the radio for continuity to ground (bare metal, lip of cig. lighter hole works well) if you dont own a meter, but have minimal knowlege of how to remove your panels check your speakers out, mabey the leads or lead like i said it only takes one, is touching metal or just blown.