Reference Cinema System 5.1.4. Includes four satellite speakers outfitted with Dolby Atmos technology, this system delivers height effects from the front AND back for a world-class experience. Provides an incredibly immersive and realistic 360° audio experience, no matter the content. Exclusive Tractrix 90° X 90° horn technology and aluminum tweeters deliver impressive high-end response and greater extension. The built-in all-digital subwoofer amplifier delivers ample power with high efficiency and true-to-source accuracy.