Re: My first ever competition...
Just to comment on the aero/precision ports. I used two 4" precisions in a 4.5 cube box for my 15" Brahma and did a 146 on lin-x. As far as round ports go I think that they are the way to go. My new box, however, is 4cu' and has a slot port of 65sq' and peaks at 46Hz. This box did a 145 on the new termlab USB.
Bottom line: play with the box....(no pun intended)
2006 Jeep Liberty
Adire Audio, Cadence, Clarion, MB Quart
Lv = [(14630000 x R^2) / (Fb^2 x Vb)] - 1.463R
*Vb = vol. in cu"
**R = sq.rt. A / Pi (for square/slot port)