Klipsch Reference RF-7 II B Floorstanding Speaker (Black) Each Part Number: RF-7 II Black Type: Floorstanding Speakers Speakers Configuration: Tower Driver Units: High Frequency Drivers: 1.75 (4.45cm) Titanium diaphragm compression driver Low Frequency Drivers: Two 10 (25.4cm) Cerametallic cone woofers Power Rating: 250W Frequency Response: 30Hz-24KHz +/- 3dB Nominal Impedance: 8 ohms compatible Sensitivity: 101dB @ 2.83V / 1m