You guys have been very helpful in getting me started on my first DIY project. My last question is whether or not one sub will work in my room, vs two. I am looking for a sub that produces tight, non-boomy bass suitable for audio amplications, but also can get low to make the room rumble during home theater applications (I am not asking for much am I?). The room it will go in is 20' x 15', with 12' ceilings. Further, one of the 20' sides has no wall...it completely opens up to the kitchen and breakfast area and hallway...typical of Florida designed homes. Thus, I have a lot of space to fill with bass. The folks at Adire suggested that I use one vented box with Tempest Driver, using the Adire Alignment. Their white paper states that this SW is 37.5" tall. This will not do with the spouse - TOO BIG!!! I was "hoping" to use a sealed design to save space, but Adire suggests it won't reach low enough or loud enough to fill the room. I was wondering whether I could get the same or a similar result using 2 SWers, possibly 2 ported Shivas or 2 sealed Tempests? Would this give me the same effect, or maybe even better? Or, could I get away with one sealed Tempest? Any other ideas? Any thoughts from you guys would be extremely helpful. I'll repay everyone by posting what will surely be hilarious/pathetic construction figures in this forum.