Yeah,thats the problem.I'm using a stealth box so I don't lose my t-top storage in my hatch. I could do a dual setup in the back,but I would lose my storage space for them. This is what I would do considering im in the same boat as you (space problem), measure out the space you have, get a custom box built, and stick it in the back. When you need space, take out your enclosure and set it inside your house or whatever. When you dont need the space, stick the enclosure back in. I have a single 10" sub in my 2door jeep wrangler and its nice but its just not enough bass. Ive tried to figure out all possible ways to fit more subs in, and the simplest is just to take the box out when i need space...