splitting round ports x2

[stevemead08 752]

Hey quick question: if im looking for say 33hz from an areo port in a box 3 cubes how do i calculate it if i need two ports? heres the situation, i have box 3 cubes, want to run 4 inch ports. if i make one port its 7.4 inches long but i need more area than that.

[shizzzon 461]

for aero ports and port calculatio, go to www.psp-inc.com

[stevemead08 752]

for aero ports and port calculatio, go to www.psp-inc.com

thanks