i want to to build a ported box for 2 p3 15s with one common chamber , each sub require 2.75ct space which is total of 5.5 ct for both subs. each sub displacement is 0.107 ct. i want to use 2 x 6'' aero ports tuned to 29hz so i need to know the gross volume of the box and how long to make the ports, any help will be appreciated . this will be a daily setup and i will be using an epicenter . thankx
