Polk Audio RM10 Speaker System (Set of Five, Black) 5-piece home theater speaker system with 4 satellite speakers and a center channel speaker Equipped with a single 3.25-inch mineral filled polymer composite midrange driver and 0.75-inch silk/polymer composite dome tweeter per satellite Center speaker includes dual 3.25-inch midrange drivers and single tweeter, 10-inch polymer composite subwoofer driver System frequency response: 30Hz - 24kHz Satellites are magnetically shielded for safe placement near any TV or video monitor