Please help with my port. :)

[Ruler]

Specs:

width-36

height-13

depth-24

wood thickness-0.6

square port height-11.8

square port width-6

square port length (1)-17.4

square port length (2)-0

total port length-27

square port diameter-9.49

square port area-70.8

square port volume internal-1911.6

square port volume displaced-1921.68

box volume-4.306

tuned frequency-36

the plan was for 4 cubes after displacement at 35 hz. with sub up port back in a subaru liberty/legacy wagon.

now what im not sure about is the port length, the calc. says total length is 27 inches and in not sure what i should be getting but i though the port length would only be around 17 inches due to the port side 1 being that.

could someone please shed some light on my port because im confused about this right now..

thanks all

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