The Klipsch Reference R-121SW 12” subwoofer features a revamped 12” spun-copper thermoformed crystalline polymer woofer that is exceptionally light and provides low frequency response minimal cone breakup and degradation-free distortion. The front-firing subwoofer allows you to place the sub wherever you want in your space while the all-digital amplifier delivers ample power with Klipsch signature high efficiency.