ok amps are simple you need a power wire, ground, remote lead (blue) and rca cables. i dont know if you installed them but they are what syncs your head unit to your amp. Rca cables are the cables that pretty much send the signal from your head unit to your amp without these you will get no sound. If you have already installed it i would suggest trying a different ground cause on my old sub it just cut out and stopped working one day then finally after me and a few friends checking it out we realized that the ground which looked to be good was a bad ground. We figured this out by taking jumper cables attaching them to the -neg side of the amp then attaching the other end to to the latch that the door latches to (the silver part that the door clicks to) hope this helps