Here are a few pics of my install in progress. Right now a don't have very much time or money, so its going very slowly. My system consists of a rockwood 4 channel 700 watt amp, one 15" Pioneer sub, a pair of lightning audio 6x9s and a fosgate af/4hd x-over. I also have a Pioneer 12 Disc changer mounted under my front drivers seat.
These are pictures of my first box with one JBL 10. this thing rocked. You can also see my amp and crossover.


Here is my head unit, a Pioneer DEHP-725.

This is my crossover closeup.

This is the first stage of my sub box. I'm making the bottom out of fiberglass to squeeze in as much air space as possible.


This is the box with the seat down.

This pic is of the brackets I made to lift the seat.
