Upgrade your current 5.1 home theater to a 7.1-Channel surround sound system by adding a pair of Yamaha NS-6490 bookshelf speakers. The NS-6490 speaker was designed for both professional and home entertainment enthusiasts with the capability to deliver a full, clear, and tight sound response. This elegant 3-way shelf speaker delivers rich, room-filling, high-fidelity sound by utilizing an ultra-wide frequency response, an impressive 8" high-output woofer, 4" midrange driver, 7/8" balanced dome tweeter, and 140W of power.