Well I think JL has made it pretty easy for me at this point in there website they have the specs for this speaker in a bandpass box config. (for one only ) it shows the box being 17x16x31.0. Pretty big size. Access to the spare tire (heck who needs one....LOL ... I probably just jinks myself) I am going to try to make it with out it. No choice when you invade the trunk like that. I will be using a jbl 1200.1 amp. So if that is not a good idea should I just go with a sealed box facing into the cabin. would that be the best?