Kenwood CRS-159 Home 3 Piece Satellite and Center Channel Speaker System 100W each Wallmountable Speaker Cables included System: Center speaker - 2 way (Magnetically shielded) / Rear (surround) speaker - 1 way Enclosure: Center speaker - Acoustic Air Suspension / Rear (surround) speaker - Acoustic Air Suspension Loudspeaker: Woofer - 100 mm (4") Cone type / 25mm (1") Piezo-Electric Type