sub set up

Hey guys, so I want to set up a sub on the rear deck mat (thing that lays over the trunk, lifts with the hatch) by cutting a hole on the middle and dropping it through, so I was wondering if anyone has done this before, and if anyone had an idea of an enclosure on the bottom. I need it small and light, and maybe a good way to fasten it to the underside of the mat. Thanks guys.

"I used to say I live my life a quarter mile at a time and I think that's why we were brothers- because you did, too."