ok the box size is this.
34.5x23x13 internal dimensions =10315.5/1728=5.96 cu.ft.
then sub displacment=328.5/1728=0.19cu.ft.
box cu.ft.-sub displacement cu.ft.=5.96-0.19=5.77cu.ft.
Then I want Aeroports. 4" ones x4
So to calulate the cu.ft of the ports combined at max 17inch length.
So box final size with displacement= 5.77cu.ft.-0.494cu.ft.=5.27cu.ft.
The Question I have is what will be my box tuned to, I don't know how to figure that out, and i want to know how to do it, I think between36-38hz or am I off.