The JVC HX Series speakers feature midrange tweeters with a pure aluminum diaphragm to provide high sound quality and extended high-frequency response. These speakers are totally new in design; the front grille is painted silver, while the backside is painted black and equipped with woofer magnet cover for stylish looks. For all your audio and video needs, click on Overstock.com. Features include: 5-way speaker 420W max power High-efficiency heat-resistant square wire voice coil Metal-sputtering olefin woofer Highly-responsive aluminum cone midrange Highly-responsive aluminum dome tweeter/supertweeter x 2 Strontium magnet (woofer) Neodymium magnet (midrange) Frequency response: 25-40,000Hz Impedance: 4 ohms