Hello... I just finished my first HT sub project last Thursday! A 12" Dayton Titanic MKIII in a 3.5 ft^3 (101 l) enclosure tuned to ~19-20hz, powered by a PE 250w plate amp. Anyhow, here are some pics... Got the walls up and the first section of port in place: Front baffle with sub/port cutout: Took it upstairs (talk about HEAVY) for a test run, was well worth it: Took it back down for sanding/filler/sanding... and applied the vinyl after a thorough wipe down: Here it is... completed! Excursion pic... This was my third enclosure I've ever built, but the first I've done for HT. Overall I'm very satisfied! It sounds great with music and is more than enough for movies... Please feel free to comment!