I want to build a center slot box for two 12's using .75 material, the subs qts is .106. I want the box to be 36x13x22 tuned @ 32. How wide will the port need to be?
Using RE's calculator (I heard doesn't account for port displacement) it says if my port is 3.75" I'll be @ 31.08 with a box vol of 4.104. If I change 36 to 35 (for estimated sub displacement) it accounts for .137 and changes the tuning to 31.61.
I don't know how much volume the port will take up. Would it be tuned close to 32 after port displacement, or is that already accounted for?