I couldn't get the link for the box, but regardless of what it was, you need a medium density fiberwood (3/4" or 5/8") box with 1 cubic foot of volume per sub. Get like a Q-logic type 1 box - all of this is on that page anyway!
I have a Q-logic bandpass box that has 2 ports on each side for 2-10" subs and 2 Fosgate P-1s SVC 400w @ 4 ohms. When installed they angle toward each other and are sealed by a plexiglass window. The questions I need answers to are, is this the right box for these subs, will this config. damage my speakers, and what is better for these subs ported or sealed?
I know those subs offer high SQ, so to better take advantage of that you'll need a medium size sealed box. Manufacturer specifies for optimum performance you need a box with 1 cubic foot per sub. Some subs can straight out sound like s**t in bandpass boxes! Not sure of those are one of them. If you want sound quality get the box I described above. If you want to get a little louder look up what ported box spec infinity recommends for those subs.
If I get a sealed box is it ok if its like 1.3 cubic feet per chamber and not 1 cubic foot per chamber?