Well Since I have put my Cavy back to stock I no longer need the audio system. I have Joe Schulte's old system and he can also put his .02 in that even though this is a 10" sub it hits HARD. The setup is a Directed SX10D4 10" Subwoofer in a Bassworx gloss black face ported enclosure. Setup is powered by a Directed 350D amplifier. This setup pounded in my car, and many couldn't believe it was a single 10" sub. I also have an enlosure the box sat on, carpeted with the same black carpet, which covered my relocated battery and helped tie it into the trunk. I am asking $300 for the entire setup and it is well worth it. PM me with any questions.
I can't upload a pic so here is a link: trunk setup
The pic is one that Joe took a while back and I have the box, sub, amp, and false floor.
-Paul