Yea i was talking about length. Ive been using this calculator. http://reaudio.com/box.php Using it, for one sub, if you enter (from top to bottom- leaving wood thickness alone) 20,15,18.75,2,11 it gives right at 30 inches of port. Length that is. I thought that was what i was aiming for lol. If you enter 33,20,17,3.25,11 it gives you right at 60 square port area. what do i need and whats better? port area or length? Thank you IA2, youve been a big help. I dont mean to be a bother, i just want my shit to be right. I can build all day long, i just cant design for shit lol