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 Diameter TW / W100 mm / 16 mm 4″ / 0.52″ CrossoverTW: Integrated, 6 dB slope W: Separate, 6 dB slope Installation diameter101.5 mm Installation depth37.8 mm.