we're gonna need more info to help you. first off what kind of subwoofer, the voice coil configuration, what impedance have you wired it up for, crossover settings, etc.
I bet it didnt hit protect. If it doesnt play any sound, obviously it cannot "see" the lower than rated load. Check for input signal(rca) and crossover settings. Quick test is to swap with a known good amp. Hope u got a warranty.lol.
lol the fact that i got 2 gay kicker 6.5's with it i don't care i only bought it to blow them for personal enjoyment.//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif