View Full Version : How much Port area for 2 18's?

04-17-2009, 08:03 PM
I have 2 DC Level 4 Xl 18's and the box will be about 15 C.F Tuned to 32 Hz.. How much port area would be best for the 18's?


04-17-2009, 08:05 PM
Personally, at least 180sq in

200ish would be ideal

04-17-2009, 08:11 PM
im doin a lil over 200 for two 15's in a wall :p: if it were me id do as much as possible keeping your cubes and tuning you want.

04-17-2009, 08:16 PM
I was thinking about 240Sq inches

04-18-2009, 03:03 AM
ok do you base this on gross or net not trying to thred jack but say my box is 10 cubes before dissplacments 8 cubes after so do i do the 12~16sqin rule to the gross or net