So, just for the fun of it, I decided to take the most massive semi-budget driver I could find, and make a fun project out of it. And I came up with this monstrosity. Inspired by the design of the Tuba HT and old horn subwoofers, I packed a 21" sub into a folded horn, outer dimensions measuring 32" (front) by 39" (length) by 42" (height). 10" opening at the mouth. Just under 4.8 Cu Ft sealed box for the woofer. horn starts at 3" by 30.5" and ends at 10" by 30.5". Powered by a Yung plate amp, the 500Watt SD500-6, with the 6db boost nicely complementing the 25hz drop in the driver response. The driver was the, surprisingly much better than would think, the Pyle PDW-21250. Though the specs are definitely exaggerated, its definitely pretty nice at the price point here. I used 3/4" MDF to build the enclosure, and some spare 2x4's I had laying around for the supports. I used TiteBond wood glue and 16 gauge finishing nails for assembly. Weighs somewhere in the range of 200-300lbs. Sealed all joints with GE 100% Silicone. Haven't turned it up beyond notch 1 of 5 so far, and was incredibly loud and sounded much nicer than I expected. Ill look into getting some equipment to measure a rough frequency chart, check loudness, etc. Ill also add some pictures after this post. Hope you guys find this fun if nothing else!