Well as you all may know I have a cavalier. I recently built a box and it was nice but I am looking for the loudest I can get. So I was looking at cc audio's celica build (nice job mane) and I thought of many Ideas for a big sub in a small trunk. So I have measured a lot today and will put up a pic in a few. So I want to do a big ass box fitting in my trunk sub facing back seat and port facing back seat. I will seal around the edges and all. Using round ports, two preferably. Any input