The Synergy Series KSW-15 powered subwoofer was first introduced in 1998 and manufactured by Klipsch until 2003. While no longer in production KSW-15 subwoofers are still owned and listened to by Klipsch fans around the world as part of two-channel audio and home theater surround sound systems. To connect with other people who are passionate about audio and interested in Klipsch products visit our open forum bulletin board.