Some of you have seen this box in my Focus. Custom built by Elite Car Audio for my mk3 hatch. Currently cut out for two 12s but room for 15s. large, heavy. Over all dimensions are L40.5" x W22" x D13". 1.88 cu ft per sub. I was running it with two Fosgate P3D2-12s. Entire box is double wall MDF. The front mounting wall is 1.25" thick. No part of this box is less than an inch thick including chamber baffle. Currently finished in spray on bedliner but needs to be touched up. Can be carpeted. Edges are routed. Glued and screwed on seams. Done right. Materials alone were more than 150.00 but thats where I would start. Nothing wrong with it I just had a new box built for three P3s. I'll edit for pictures in a few not working at the moment.