hello, I recently built my own subwoofer, i uses the dayton titanic 15" and of coarse the dayton 1000 watt pate amp. I built the recommended enclosure on the sight, but instead I used two 4" ports at about 33" long each. I used elbows to make it fit, my problem is the driver bottoms out way to soon, I think its the air ressistance. I tryed blocking a port - no difference - then I completly blocked both ports and still almost no diffence. I would think I need too slow down air movment with a baffle or somthing, does anyone else think im right? any suggestions would be greatly appreiciated. Thank you.