Well, it only took a couple years, but my AA ported sub is finally done! I had the box built and ready to drop in a Tempest, but when the time came to order, the Tempests were on backorder. I then read about the Atlas 15 from Ascendant Audio, and went with it. The Atlas dropped into the hole I had cut for the Tempest with no problem. Used port kits and the Rythmik 350 amp from Kyle @ Acoustic Visions. I haven't done any tests yet, but so far I am thrilled with this sub! Watched a Harry Potter movie with my son the other night, and have viewed a few scenes from Monsters Inc. The sub seems to blend beautifully with the rest of my system, (Pioneer VSX 1014, JBL S36 for mains and surrounds, S-Center) and the bass is awesome! Very non-localized and room-rattling. Will eventually try to post some readings and pics. Thanks to Chad and Kyle for all your help.