If you cross the sub over at about 100 hz or below, you'll have a hard time placing it with your ears. You'll have to bottom mount the sub. Otherwise, it won't fit. I would recommend making a baffle out of 3/4 material (MDF/plywood) and mount the speaker to the under side of the wood. This will give the speaker the room to move if you end up with a high excursion sub.
