Def. the old XXX... I just got mine back in my car sealed... If you seal it you get a LOUD *** SQ sub, and if you port it you get a LOUD SPL sub with some pretty good SQ. I heart my XXX //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif