OK, I have a Titanium Elite LED 12. I built a box using supplied specs. Went with a slot port port though. Jeez, bad design, didn't know that you need to double port face dimensions for each cubic feet to avoid port noise. Anyway, once this baby gets moving, starts chuffing like no tommorow. I am Redesigning the box with DUAL FLARED ports. According to design theory it should nearly eliminate all port noise. The problem is PG specs are for single port 4" x in length. Depending on if SPL or Musical. I ordered 2 flared ports from Amazon.
The question is: How long should the ports be? When you switch from a single to double port are the still the same length? Would you half the recommended length since you are using 2? BTW - Those TIs pound!