ports

[FreekDesignz]

BTL 18 – Ported box we recommend using 5-8 cubic feet @ 30-35Hz tuning, you can tune a little higher if you wish but we recommend keeping it close to 32hz for a daily driver. Again the same 12-16 square inches of area applies per cubic foot of volume.

i am building a box with 6.5^3 of space. do i build it with port displacement included with the 6.5^3 or with out the port displacement???