I have a JL Audio 12W7 in a 1.36 cu. ft. sealed box.Box is constructed 1 inch mdf all around and built to exact JL specs. I also have a vented box as well 1.75 cu. ft. as well.Both boxes are covered in felt and cost me a ton of $$ to have custom made. This is a set for a true fanatic that likes music the way it was meant to be heard Loud and Clear with maximum impact. I'm trading my car for an M3 so I have to let go of this set up. Pls. e-mail me at erniejr33169@yahoo.com if interested.Serious enquiries only pls. Price is set at $375 firm.thanks.