Box for 12" Q

[4X4AUTIGER 0]

Okay so im going with a 12" Q with the BP option and an audioque 1200D amp. I want to port this sub around 33Hz. How big of a box should i make? I know Fi recommends anywhere from 1.8-2.5 cubic feet but what would be the best? Would it be better to go bigger than 2.5 cubic feet or should i just stay around that number? Thanks

[BKOLFO4 29]

With 1200 watts, I would not go much higher. 2.25-2.5 with 35 sqin of port area works.