Its a 122L sealed tempest. I pretty much followed Adire's plans directly for this alignment; the only modifications I made were to account for the amp mounting, and I also flushmounted the driver. It provides a pretty sleak look. http://www.markfitzsimmons.com/sub/dscf0055.jpg http://www.markfitzsimmons.com/sub/dscf0056.jpg http://www.markfitzsimmons.com/sub/responce.jpg I've very pleased with the end result. The total cost of all materils was right below $330. And as you can tell by the above graph, its responce in room is flat down to about 21hz, pretty impressive for a sealed sub. The sound quality for both music and movies is the best I've heard. The carpeted finish is pretty attractive, I chose this because its alot more conveinant than painting MDF and alot cheaper/easier than a veneer. I'm pleased with the result, albeit it being too large to put in a dorm room (currently senior in high school) I'll probably end up making a sealed Shiva or Dayton for my college dorm. Enjoy!