You know I put 6 1/2's in my doors of my Silverado. Those are actually a Mid speaker. You can use them for base. A good freind of mine who does custom inter. for Hot roads. Has taken an interest in my CF, and is working on were to hide a 12" Or 2 in the car. I'v seen a couple of ideas, but nothing in stone yet. There is one guy who has a new systm going.