I have two 10" JL Audio 10w3v3 2 ohm subs. They will be powered by a Rockford Fosgate Punch amp, P500x1bd. The open space in trunk (after wood surround) where speakers will be pointing is 4' wide x 1 1/2' deep x 1 1/2' high. Is that enough open space? The subs will go in a dual sealed 3/4" MDF box with 1/2" birch ply boxing the trunk surround with two amps and power block mounted in that space. Rattletrap sound/heat material will cover just the floor. I have a fiber panel on the back of the rear seat. Here are a couple pics of the work in progress.