It's a CARVIN PRO-BASSII bass amp rated @ 200watts RMS per chanell(high/low),here's the problem it turns & you can hear the hiss through the speakers,also when i turn it on the speakers Jump indicating the power surge through the speakers,but when i plug into either chanell i get nothing,,,, im just wondering if any of YOU can fill me in on what you think MIGHT the problem is?,,,im trying to avoid getting ripped off before i take it in!