Polk Audio RM85 5-Channel Home Theater System (Set of Five, Black) 5-piece 5-channel home theater system Includes 1 RM8 center channel, 2 RM8 satellites and 2 RM7 satellites Over all frequency response: 95Hz-24kHz RM8 satellites' dual-driver design ensures more dispersion pattern options for the utmost in placement flexibility Magnetically shielded for safe placement next to today's state-of-the-art TVs and monitors