And Probox is pretty good..
Said I had to have my subs in a 4.4cu.ft enclosure, and by trail and error, I found that 4.6cu.ft. is pretty good, the loudest it's been... 8cu.ft wasn't that loud, 2.2 was just god aweful, and 4.4 is just right...
And on a buddies rig, it stated that 2 12" Memphis PR's were best in .92cu.ft. sealed enclosures... Sure enough... It can hit a 136 with 100watts to each sub!(talking about the TL of course...)