In my old Prelude I had an Image Dynamics IDQ12 in the spare tire well. Sounded amazing. I still have the sub and was thinking about giving it a go in the GP but was wondering if anyone has given this a try. The Honda didnt have much of a back seat so the sound was able to come through very easy. Not sure how well it's gonna sound coming through the leather. If anyone hasn't tried it I will try it out and let everyone know.