The flagship Reference Series RS-42 surround speaker lets listeners experience the true impact and exhilaration of surround sound. With its ideal combination of technology, performance and design, this surround speaker represents the best in edge-of-your-seat excitement. Exclusive Tractrix Horns have always been the key component of the Reference Series. In the RS-42, this technology has been refined to include improved throat geometry for a more genuine, lifelike sound. Behind the speaker"s dual horns lie 1-inch titanium tweeters with large ceramic motor structures to provide a unique combination of precision, clarity and effortless power. The RS-42 employs dual 4-inch woofers for a solid bass foundation. Klipsch Wide Dispersion Surround Technology (WDST) provides crystal-clear sonic detail even in listening areas with less than ideal configurations. The Tractrix Horns deliver a 90-degree wide by 60-degree high dispersion pattern. By aligning two horns at 90-degrees with respect to each other, WDST smoothly covers a 180-degree horizontal arc. In other words, the surround sound is pointed at you no matter where you are seated. Mounting - Keyhole Bracket And Dual 1/4-20 Threaded Inserts Dimensions (HxWxD) - Height - 15 Width - 14.75 Depth - 9.75 / Weight - 28lbs (12.7kg) Sold as a single speaker - 2 required for stereo or front L/R channels