Thanks, and I checked it out. I think I'll do one like SnoopDans where it's 2.5ft^3 @ 45 Hz. He had 146.9 db with 5000W. I'll try out that enclosure with 1500W and see if it get's me in the 140s.
Also, I find it funny that your name is Impact9. I post in Hawaiicaraudio.net and there's a guy on there named Impact that used to be a SI dealer (when SI had dealers). I pmed him a few times talking about this. I thought you was him. But your from Kansas not Hawaii.