This Acoustic Audio 7.1 channel multi-speaker system features 7 perfectly matched in-wall speakers and a maple 10" powered HD Series subwoofer. The system consist of five rectangular 6.5" 2-way in-wall/ceiling speakers, two round 6.5" 2-way in-wall/ceiling speakers, and one maple 10" high definition powered sub. Because the speakers mount seamlessly into any wall or ceiling, there is no need to worry about unsightly speaker wire cluttering up your home or office. Each two-way speaker features polypropylene cones with soft dome tweeters and butyl rubber surrounds. The HD sub sports an 10" front-firing woofer with a woven Kevlar cone and has a built-in 600 watt amplifier. The advanced bass reflex cabinet is equipped with a rear slotted bass port. It has an adjustable gain control and a variable crossover so you can perfectly match the bass response with your speakers. The high and low inputs let you use any receiver or amplifier and its maple finish fits with any decor.