You could have a blown amp. Here's a couple of questions that we need, in order to properly help you:What kind of amp?How many subs?Ohm load of the subs?Which protection light is on, overcurrent or protection?Good luck to ya!
J. Mykel HillSLAP Mid-West Event Coordinatorjmykel@slapshow.comCertified IASCA JudgeCertified SLAP Judgehttp://members.cardomain.com/audiophyl2002 Sound, Looks, & Performance National Champion--Advanced Mitsubishi