Having a Roadster, I'm very limited to my options with no commercially available enclosures. Probably going to have a local shop fiberglass a free-form enclosure in the Convertible top storage area(there is a ton' of Styrofoam taking up space in there). I'm using the trunk right now(10" Sub in 1.5CF ported box) and it's not too bad, but there is a solid sheet of metal reinforcing the body between the trunk and the cabin and it cuts down on low frequency transference. Never felt so "removed" from a Sub.