2 Boston Acoustics Horizon Series HS 40 Bookshelf Surround Sound Speaker Pair The Boston Acoustics Horizon Series HS 40 combines clean, vibrant sound with a sleek, modern design that goes well with virtually any dcor. It features a compact cabinet with smooth, curved edges, in a Midnight finish. Includes a matching grille. An integrated keyhole slot makes it easy to hang the HS 40 on the wall. Great for placement near a flat-panel TV. This versatile speaker performs well as part of a stereo or home theater setup. Team a pair of HS 40s with a powered subwoofer for full-bodied sound in a stereo system. In a home theater system, you can use the HS 40s as fronts and surrounds in smaller rooms, or team them with other Horizon Series speakers for surround sound in larger rooms. Recommended center channel speaker: Boston Acoustics HS 225. Pre-owned in great condition. Tested and works. See pictures for details. Let me know if you have any questions. Thanks for looking and have a great day! video-shielded bass-reflex (ported) enclosure frequency response 86-25,000 Hz 8-ohm impedance sensitivity 89 dB handles 10-100 watts 1 tweeter 4-1/2 copolymer woofer gold-plated 5-way binding posts 6-7/16W x 8-3/4H x 5-15/16D