please do not just "add" an aeroport. if u do go ported they are a great option, and do help output in most cases over slot. BUT do not just "add them" to a sealed box, go back and rework ur plans, or get in touch with me to do so..Got ya, I thought they were jsut called vented box or something. My box is exactly 1 cb ft. I am getting sub Thursday ajd see how it sounds.