Ok i know there has new info going around that with flared ports you can use half the port area of a slot port, I think the correct number was 56% less. I am building a box that is about 6.5 cubes per chamber. Each chamber will have an 18 Inch LMS-Ultra. I am tunig the box to 30 Hz. I am debating if i should do 2 or 3 flared 6in ports per chamber. My goal is SQL, more emphasis on the SQ since i know 2 18's off 6k will get loud enough. The subs will be up and the ports back. I am worried if i do 2 that will be choaking the subs, but three might be too much since you can get away with less port area with flared ports.