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 TW: Coated silk dome M: – W: Coated paper Crossover Separate, 12 dB / 12 dB slope with 3-stage tweeter level adjustment Outer diameter TW: 43.3 mm / 1.71″ M: – W: 101.5 mm / 4.00″ Installation diameter TW: 41 mm / 1.61″ M: – W: 91 mm / 3.58″ Installation depth TW: 9.6 mm / 0.38″ M: – W: 37.8 mm / 1.49″