Port area for Soundqubed HDS312?

[Based]

I'm designing a ported box for 2 Soundqubed HDS312's and I want it to be 5 cubes after everything. Going by needing 12" - 16" per foot so I would need between 60 and 80 square inches of port area. If I made the port 20x4 it would need to be 32.73 inches long to tune to 32hz meaning the port displacement would be 1.79 cubes. If I made it 20x3 or even 20x3.5, the displacement drops drastically.

My question is, does anyone have any experience or recommendations on how much port area the HDS312's need?

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[mlstrass 5,000+ posts]

14-16^2 per net cube works fine....unless you do them sealed like this one....

 

[CSCStang]

I'm designing a ported box for 2 Soundqubed HDS312's and I want it to be 5 cubes after everything. Going by needing 12" - 16" per foot so I would need between 60 and 80 square inches of port area. If I made the port 20x4 it would need to be 32.73 inches long to tune to 32hz meaning the port displacement would be 1.79 cubes. If I made it 20x3 or even 20x3.5, the displacement drops drastically.
My question is, does anyone have any experience or recommendations on how much port area the HDS312's need?

36-40 sqin per driver is proper for the hds3s.

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