The Velodyne Digital Drive + 12 Inch Subwoofer is the best sealed 12" I've ever tested. - YouTube
Velodyne Digital Drive PLUS 12 Inch Subwoofer(gloss black)(each) Velodyne Digital Drive PLUS 12 Inch Subwoofer Black - $2,880.00 : New Audio & Video, New Electronics at Lowest Prices!