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 15" Brahma running off Cadence A7hc, Clarion hu, MB Quart 6.5s and 5.25s running off old school Punch 800a4
146+db @ 38hz with 1200w and a single 15"
Lv = [(14630000 x R^2) / (Fb^2 x Vb)] - 1.463R
*Vb = vol. in cu"
**R = sq.rt. A / Pi (for square/slot port)