Here's what i'm thinking about. Has anyone tried to install a small say 8" sub under the front seat? I want to add some bass to my truck, but I don't want to lose the space under my rear seat. If no one has tried it maybe I'll have to pioneer this idea. One question, under my passenger side front seat is a vent of some sort. What does this go to? Part of the ac system or something? And what would it hurt if I covered it up.