Polk Audio RM7 Center Channel Speaker (Single, Black) A single center channel loudspeaker with heavy-duty, non-resonant composite enclosures Equipped with two 2.5-inch midrange drivers and one 0.5-inch tweeter Frequency response: 95Hz-22kHz Magnetically shielded for safe placement next to today's state-of-the-art TVs and monitors Accessories include flexible wall brackets and cradle