I have built a sub enclosure for a jl audio 12w6 or 12w3 to replace the spare tire.may work for other subs that need a 1.25 cubic ft sealed enclosure. i will be putting it in today. i will post pics when i can. it is made out of 3/4" mdf . for those that may be intrested i will make them to order, but have not decided on a price yet. shawn