Placing Subwoofer in Convertible, Need some ideas here Options

[liquidnate5000]

OK, I have a 97 GT Convertible and I just purchased a 15" Polk Momo Sub. Now my delima is where to put it. I don't want to take out the back seat, so please no one propose anything like that. The big issues are security and quality. I really don't want the sub displayed so that every kid passing by gets the idea to rip open my top and take the sub. But I also want to get the best sound quality possible (I know its a convertible, so it's never gonna be that awesome with all the wind noise and crap, but at least to the point where I can make good use of my investment).
So I'm open to suggestions. If you have any, please post it here.

[Coomer]

You'll probably get pretty good sound if you have the sub in your trunk, because with a fifteen, it's either the trunk or your backseat. Had you purchased a ten or a twelve, you may have been able to remove your rear speakers, build a custom fiberglass enclosure where the rear speaker used to be on one side, and put a sub in there. Also, it may have been possible to use a small sub on your rear deck, covered by mesh, though I'm not exactly sure how a rear deck is setup on a convertible.

I'd just suggest sound deadening your trunk, and then building an enclosure for the trunk. In my trunk, I've found that I got the best sound when I had the subwoofer aimed at the rear of my trunk.