This is the same model cab. I lined it with 1 1/2" mattress padding, and it sounds MUCH better, but still seems like it get's "choked" on some lower notes. It has a simple 4" circular port in the front baffle, internal dimensions 25" tall, 22.5" wide, 9.75" deep. Would enlarging the port "open up" the sound? Or is it just a function of using a cab closer to the small end of the drivers range? (~3.15 Cu FT). I'm going for a strong almost reggae/dub thickness in the lows, FWIW.