I have a ported box with 2 kicker subs, without accounting for sub displacement and port displacement the over all volume of the box is 4.48 cubic feet. Assuming the subs displacement is about .1 each, I'm trying to figure out how long I should make the port. The box came with two 4 inch round ports(inside diameter). Im not sure how long to make both of the ports. With a online calculator it said to make it 8.1 inches. Would I split that and make both of them 4 inches? Or just plug one of the ports?
Thats tuned to 27 hz, my buddy wants it to be low.