Polk Audio RM10 5.1 Home Theater Speaker System with Subwoofer (Set of Six, Pewter) 6-piece home theater speaker system with 4 satellite speakers, center channel speaker, and powered subwoofer Equipped with a single 3.25-inch 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 5-way binding post connections, magnetically shielded and wall-mountable