Port Dimension question

[SOOTSHE]

http://greatplainsaudio.com/wp-conte...604_8H_III.pdf

Resonant freq is listed as 33.70 hz

The classical method of tuning is to tune the cabinet
to the resonant frequency of the driver.

You may get "chuffing" from the rectangle vent.

The PVC duct is easily tuned with the coupling.

I would use Baltic birch, apple birch plywood. 13 plys
for 3/4 inch plywood.

Thanks for your input.