Type 3-way quadruple 6.5" Center channel loudspeaker; Low-frequency transducer Four 6.5" (165mm) Deep Ceramic Composite (DCC) aluminum cones with cast frames; Midrange transducer 5-1/4" (130mm) Deep Ceramic Composite (DCC) aluminum cone, with cast frame; High-frequency transducer 1" (25mm) Beryllium dome with acoustic lens wave guide; Recommended amplifier power range 50-300 Watts RMS; Frequency response 46Hz40kHz (-6 dB); Low-frequency extension 37 Hz (-10 dB) 46 Hz (-6 dB) 52 Hz (-3 dB); Nominal impedance 8 ohms