The SW series SW-15 powered subwoofer was first introduced in 1993 and manufactured by Klipsch until 1994. At the time this was Klipsch top of the line subwoofer and its one active 15" and one passive 15" design survives today on the top of the line RSW-15. While no longer in production SW-15 model subwoofers are still owned and listened to by Klipsch fans around the world as part of high performance home theatre systems. To connect with other people who are passionate about audio and interested in Klipsch products visit our open forum bulletin board.