need help on vent

[jmcj4175]

ok i need help the box i have now is 48inchs wide 20.50inchs high and 17inchs deph so now i need to know how many inch gap i need for the vent and the L for the vent the subz are earthquake subzeroz 12 •2000 Watts Max

•1000 Watts RMS

•REVC = 7.7 Ohm

•LEVC = 1.34777 mH

•Fo = 26.8 Hz

•Sd = 53.093 msqM

•BL = 26.7542 TM

•Qms = 10.8730

•Qes = 0.4411

•Qts = 0.4239

•SPLo = 85.8761dB

•No = 0.2431%

•Vas = 58.1 M

•Mechanical Xmax = 3.5" / 88.9mm peak to peak

•Electrical Xmax = 2" / 50.8mm peak to peak

•Cms = 144.8275 uM/N

•Mms = 243.509g

•Mmd = 236.49g

so can any one help on this i want it to get down to 32 or 28 hrz or open to any ones ideals i like low bass yet to be able to still play all