Model High power midrange speaker Diameter 165 mm / 6.50″ Power handling (RMS/max.) 120 / 320 Watts Impedance 3 ohms Efficiency 98 dB Frequency Response 250 Hz – 12 kHz Voice coil 38 mm / 1.5″ CCA Mounting Ø 143 mm / 5.63″ Mounting depth 65 mm / 2.56″ Resonance frequency (Fs) 133 Hz