Polk Audio OWM3 On-Wall Speaker (Pair, Black) Pair of on-wall speakers for a 5.1, 6.1 or 7.1 channel surround system Equipped with one 1-inch fabric dome tweeter Frequency response: 80-25KHz Equipped with one 4.5-inch polypropylene cone woofer Super dense glass-filled ABS creates an acoustically inert cabinet, insuring an extremely clean and low coloration midrange response