Hey, I have a set of Audiobahn AW1200V subs. I currently have them in a sealed box, but I am looking at building my own ported box. I bought them secondhand from a friend and they did not come with the owner's manual so I looked it up online. I found specifications for building a box and am looking at building the SPL version on the sheet. Can anyone help me interpret whether this sheet is saying it requires 2 ports per sub, and also if these are circle ports or do you see where otherwise stated? Also, would someone mind checking my math and see if my internal dimensions of 19x18.5x17.2 (LxWxH) and see if it comes out to the right vol. per sub.
