This guy has obviously spent a great deal of time and effort on these, but it's too bad he used cheap drivers and who knows what other components. The crossovers sure look pretty elaborate, though. Over 500 lbs each, wow!! He's been trying to sell them for a month or so, and I seriously doubt anyone is going to pay 5 grand for them... http://syracuse.craigslist.org/ele/4188399292.html