Ok sorry everyone i said i was gonna get back with more info about the port area but i was on vacation at cedar point riding the worlds fastest roller coaster. haha but ne ways the head engineer at DD got back to me and said that the more port area the louder the sound as long as your speaker has the suppension to handel it. but a good rule of thumb is 3:1 ratio of speaker area to port area. That should be "Enough" port area for just about every sub.