if you have 8.3 cuft before port and sub dis.lil bump for a lost guy //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif4 aeros of 4 inch with a lenght of 13 inch each for 32hz tuning in 8.3 ft/cu ??? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif
port Dis. 0.43cuft + Sub Displacement: 0.24cuft (fi home page)= .63cuft
8.3cuft -.67cuft=7.67cft total.
ok this is what you need.
4"port x 15 long