ok 3:1 ratio you mean ported 3 and sealed 1 right?? what would be the difference if I thorw in an isobaric 15" instead of 12"??Thats right. Ski hole. Got confused with all the retarded on here post lately.
Do a 12" in a 2:1 or 3:1 ratio 4th if you can fit it.
wouldn't I gain a Little bit on space??