hd15d1

Design: The box is tuned to 33 hz, the port is 29.5 inches long and has 67.7 Ft2 of port area (14.25 x 4.75). The box is ~ 7.7 cubes overall, ~ 6.3 cubes internal, 4.5 cubes allocated to the sub and the remainder allocated to the port, the port material, and bracing. I used this excel "program"...