Standard surround sound provides five channels for surround effects. But with 6.1-channel surround sound, the Acoustimass® 16 Series II speaker system increases the impact of home theater listening with a rear center speaker for even greater drama and realism. This heightened experience in music and motion picture listening is the result of a powered Acoustimass module. This innovative module uses proprietary Bose technology to bring depth to the rumble of a passing train, or the resonance of a baritone's voice. The module can be hidden nearly anywhere in the room. You enjoy rich, colorful sound that appears to come only from the small speaker arrays. Imagine your favorite movie in Bose 6.1-channel surround sound. Footsteps click on the sidewalk behind you. A flute plays to your left. Voices, front and center. The new horizontal center channel speaker array keeps dialogue focused on the screen and visually complements flat-panel TVs. The Direct/Reflecting® cube speaker arrays envelop you with surround sound effects. Just 6 inches tall, these arrays deliver high and midrange frequencies so you enjoy crisp, clear reproduction of movies and music. And even though you're enveloped by 6.1-channel surround sound, your room isn't overwhelmed with equipment. The small speakers can attach to your walls or sit stylishly on an end table with our accessory speaker mounting options.