Power RMS / max. 60 / 120 Watts Frequency response 100 Hz – 25,000 Hz Impedance 4 Ω Efficiency 1 W / 1 m 90 dB Cone material HT: Coated silk dome W: Coated paper Crossover Separate, 12 dB / 12 dB slope with 3-stage tweeter level adjustment Outer diameter HT: 43.3 mm / 1.71″ W: 118 mm / 4.65″ Installation diameter HT: 41 mm / 1.61″ TT: 84 mm / 3.31″ Installation depth HT: 9.6 mm / 0.38″ W: 31 mm / 1.22″.