Posted December 8, 200717 yr So I am about ready to start this new setup. I ended up thinking that I would like to go with two flared ports with a 15" sub. Is it okay to put two flared ports in an enclosure with a single 15? I wanted to do this, sadly, for the looks so I can keep the sub in the middle of the enclosure so things stay symmetric. How do I go about this. Do I follow the same rough 12 to 16 inches of port area per cu ft of volume or do i now divide that in half since I am running two ports. Any help would be great as I dont want to screw this up. THanks.