So im new to this forum. Alot of the guys at the show in Alsip, IL today said they liked this forum so I figured I would give it a shot. A few guys pointed out that my port is way too skinny. The box is 5 cubes tuned to 30 Hz. I know i dont have nearly 80 in^2 (16*5). So i guess before long im going to have to build a new box...again...current one is only a few months, actually, not even 2 full months, old. So if i do another box at 5 cubes tuned to 30 Hz with 80 in^2 of port area, how deep does the port need to go? Also, for my 2 12" clarions do you think that box is a bit big? I built it to where i got the flattest response curve without losing my entire cargo area (figured ill enjoy it till i go with 15s or 18s.