I have been trying to find a box for a single sub that fits under the rear seat without being oversized. I was planning to try and build one before I ran across this sub box from Fox Acoustics.
The quality, fit and finish is top notch. I am using an old MTX Jack Hammer 10” and it sounds amazing n the box. The amount of airspace, provided by this box design, is almost an exact match to this sub.
I could not be happier. Fox Acoustics had this thing to my door in about three days.