After about six months of research, my father and I finally almost finished my first DIY project - a Stryke AV12 sealed subwoofer. It's a 3/4" MDF 15" internal cube ~.6 Qtc alignment, braced with a combination of JL Audio's Types A, B, and C braces, stuffed with about a pound of fiberglass insulation stapled to the sides, and powered by the Adire AVA250. Here are a few pics: Stryke Audio AV12 subwoofer driver (top) Stryke Audio AV12 subwoofer driver (bottom} Adire Audio AVA250 Subwoofer Plate Amplifier Unfinished box Semi-completed AV12 subwoofer (front, left, top) Semi-completed AV12 subwoofer (front, right, bottom) Semi-completed AV12 subwoofer (back) I wish now that I had taken some more pictures detailing its construction (especially the bracing and stuffing), but I only have limited access to a digital camera. But how does it sound? In a word, fantastic! In direct comparison to the affectionately called "Little DLS," Dayton's 10" powered subwoofer, the AV12 subwoofer can play deeper, louder, and, much faster (more on time?). The DLS sub lags behind my SCH K05B50s on pieces like Bach's Toccatta and Fugue in D Minor, but the AV12 keeps up admirably. I'm still curious to see how it would compare to Adire's DPL12 or Tumult in similar alignments, but so far, the musical presentation of the subwoofer is all I can ask for. (Until I get my hands on an LT and a bit more power, that is. ) So what do you all think? I'm not satisfied with the looks of the subwoofer yet, particularly the seams. :b I have some pine trim and some nice hardwood lying around and hope to to finish it like Jeffrey_S finished his Tempest, but that's only a hope. I would've went with legs or spikes for the bottom, but since I'll be moving this thing around a bit during the next few months, I figured the wheels would come in handy. In any event, thanks to everyone for answering my questions and for giving feedback by helping others finish their own projects. I'd like to take on Linkwitz's Orion and a pair of dipole subwoofers as my next project, but for now, I think I'll give my wallet a rest for a year or so. Think, anyway. :wink: Edit: Couldn't tell my right from my left.