hey i just got a Pyramid Technologies Pyramid PB781X 1000 Watts 2-Channel Crystal Amplifier from a friend of mine and am using a rockford 12 in p3 punch seres sub. I did all the wiring correctly and all but the "protect" light comes on and doesnt let the sub play, we did all the testing using a tester to see if the power flow was alright and its all good. Whenever we unplug the two audio wires from the back of the amp and then turn on the car, the light goes away, as soon as we plug them in it comes on. we even used different speakers to try them on and the same thing happened. so my dad and i narrowed it down to this problem: the audio wire slots from the amp to the sub is not allowing a complete circuit to form. we dont know why tho. any suggestions? thanks!