The sub enclosure is fiberglass/mdf 4.8cubes before sub displacement. The sub shown is and Adire Tempest, an outstanding sub for HT or car audio use. The idea behind the enclosure was to be able to keep my spare tire along with jack, as well as having a large enclosure.

Finished, with Brahma

Spare

Hydraulic jack
This is my beast 145lbs of snoring sleeping dog.