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 Classic products, visit one of the several Klipsch Classic areas on our open forum bulletin board.