I just bought two Fi X 12's. I'm in the process of designing my box and i realize that i don't have the displacement of the speaker itself, recommened sealed cuft, or recommened ported cuft. But i have the other specs: X12 D4 Fs 25.7 Hz Re 3.9 Ohm sper coil Qms 4.01 Qes .38 Qts .35 Mms 120g Cms 3.2mm/N Sd 480 cm^2 Vas 104.1 l SPL 88.6 dB 1W/1m BL 20.0 N/A Xmax 16mm RMS 300W Can anyone help me on this one? Thanks!!!