The Polk Audio R150 2-Way Bookshelf Loudspeaker with 5.25" Mid/Woofer can be used to build a small system or used to add speakers to any other system. A rear-firing bass port adds surprising low end and doubles as a built-in wall-bracket.
The Polk's proprietary, patented Dynamic Balance technology allows engineers to design out distortion-causing driver and system resonances, so you only hear the good sounds.
Unlike horns or metal domes, silk dome tweeter delivers clear and detailed highs, without fatigue, even at high volume. Durable, efficient and tuned with Dynamic Balance process, polymer composite cones produce smooth, natural sound. Acoustically inert stamped driver basket is strong and vibration-free and durable butyl rubber surrounds deliver a lifetime of high performance.