please help with my box

[slipknot87420 10+ year member]

ok i have a box for 2 12s and its 1.25 per sub i have 2 4in by 12in ports here are the specs for the sub

fs 38.1 hz

vas 63.1 ltr's

qts o.38

qms 10.13

qes 0.4

xmax 4mm

re 3.49ohms

sd 64.3in2

cms 0.25x10-3

mms 2.43oz

spl 91db

vc dia 2"

what do i need to tune it to i was thinking around 33 what is it tuned to now? with 2 4inx12 ports please help

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[ChefJoe 10+ year member]

http://www.linearteam.dk Programs>ISDonline>Calc new driver, then vent calc, use all the same units (be it cft, cliters, etc).