Wow its been about 3 weeks and nobody has replied. Well it doesn't matter anyways since I used my troubleshooting skills to figure out the problem. The problem was with the DIN connector on the subwoofer. So I removed the old on and ordered a replacement from Digi-Key. The digi-key part number is CP-2260-ND and here's the link to the one I ordered:
http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go〈=en&site=us&keywords=CP-2260-ND+&x=5&y=15
After soldering the new connector on the sub was working again. I just thought I should share how I was able to fix mine in case someone else had the same problem as me.