Technical data Power RMS / max.60 / 120 Watts Frequency response100 Hz – 25,000 Hz Impedance4 Ω Efficiency 1 W / 1 m90 dB Cone materialTW: Coated silk dome M: – W: Coated paper CrossoverTW: Integrated, 6 dB slope W: Separate, 6 dB slope Outer diameter118 mm / 4.65″ Installation diameter84 mm / 3.31″ Installation depth31 mm / 1.22″.