Box size question

[amadeusz13 0]

Hey guys im looking to buy a custom box for a Fi Q12 and I was recommended 3.2 @32. I was reading on here that they recommend 1.8-2.5 cubic feet @ 28-33Hz (32 being optimal)

Im a little confused, could some clarify what the best box to purchase would be.

Cheers!

[AlanHall 6]

i build 2.5 for all my 12 boxes.