low sub output

I bought a new car and had a new shop install my JL 500/1 (v1 I think) powering 2 JL w3's in the H.O. wedge box. I was excited! That was a few hours ago. I also let them put a break in the power chain with a 2 Farad Cap from Tsunami in there. The cap seems to have crapped out. I didn't monitor...