Polk Audio CSI A6-Cherry High Performance Center Speaker Single, Dual 6.5 inch Drivers and a 1-inch dome tweeter Part Number: CSi_A6_Cherry Type: Center Channel Speaker Speakers Configuration: Center Channel Driver Units: Mid/Woofer: 2 - 6.5 Diameter, Polymer Composite Dynamic Balance with rubber surround Tweeter: 1 - 1 Diameter, Silk Polymer Dome Tweeter Power Rating: 20-200 w/channel Frequency Response: 45Hz-27kHz Nominal Impedance: 8 ohms Sensitivity: 90 dB