HTF got a mention in the comments: http://slashdot.org/article.pl?sid=0...thread&tid=137 But be warned, according to this comment, the sonosub actually sucks! So all you guys who've built them yourselves or bought an SVS? You're all wasting your time! This guy's computer simulator told him so! http://slashdot.org/comments.pl?sid=40383&cid=4305428 The cluelessness of some is truly amazing.