Need help with my current problem. A couple weeks ago my subwoofer stopped working. I carry a lot of stuff in my trunk (bowling balls, golf clubs, etc.) and I assumed one of these damaged it in some way. I then bought a new 12" Kenwood sub and hooked it up. It still didn't work. Once this happened I began checking all the connections, which were good. The amp had a good ground and is getting power (enough for it to turn on at least). I then hooked my amp to my buddy's system. The amp is working fine. After this, I swapped out the RCA cables for some new ones, but the problem is still not solved. The only response I am getting is a SUPER faint rattle from the sub.
It's not the RCA cables or the Amplifier, so could it be my headunit or is it something else that I am missing. Please help.
JVC KD-420 headunit
Sony Sony XM-D9001GTR amp
Kenwood KFC-W3012 subwoofer 12" 4 ohm
Tsunami amp wiring kit