10 cu.ft. @ 33hz (2 HDC3 18's)
This design is for team3d and his pair of 18" HDC3's. I'm trying to get better at designing boxes in Google Sketchup, so critiques/comments are welcome.
To be exact, it is 9.92 cubic feet tuned to 33.3 hz after all displacements. There are 85 square inches of port.
Step 1 - I left enough clearance for you to use flared aeroports. I'm not sure how to draw them in sketchup. Those guide lines will get you the center of the port.
Step 2 - if you choose to brace differently, the brace displacement is .25 cu.ft.
Absolutnockout, zachzchw, Untouchable11, j3bus2k3 (x2), 92c1v1c, jeeper07, acubsfan, bkjt05, Goldenknob, Goindef154, Basscourt2009, TeamSouthrnBass, oldschoolboomer, 99grandprixGT
Gearguy2001 (American Bass SQ780)
Tw1st3d13 (2 Fi BL 15's)