Here's a sneak peak at my install I will be posting in the near future.
The fake wall houses an Audison Voce AV12 12" sub. With the back seat down the SQ is incredible. This may very well be the best sub I have ever heard on the SQ side. The sub is in a 1 cubic ft sealed box suppported by my amp rack at the rear bottom side, two brackets attaching it to the rear deck, and being pressed up against the wall.