Well its not that simple since the subs are separated its not one common chamber, plus you lose volume in the front which decreases efficiency. I have another design that im going to try this weekend.why not just slide the baffle towards the front of the vehicle a little? that would make the sealed portion larger //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif