need designs for a bandpass box for 2 12''s!!

[bigblackchevy08]

i got 2 lanzar max pro 12''s 1600 watt peak a piece and 800 watt rms for both dual 4 ohm got a jl 1000 watt mono pushin

for one sub thses are the specs. please help (will sell amp toanyone whos interested)

max sealed 1..2 cu.

max port is 1.25 cu

fs(hz) 40

Qms-5.0

qes-.90

qts-.75

SPL(db) 89

Vas(5.204)

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