I currently have a 12 inch XXX in a 1 cube prefabricated sealed box. I know it is probably not getting anywhere close to it's potential. I drive an F-body and have literally no trunk space at all. I won't have this car forever so i don't want to invest money into a custom box that won't even be that big. Do i have any other options (cheap options) to get this thing in some kind of a ported box or anything?