Compatibility: C -series A205 C205 W205 S205 W206 S206 E-series A238 C238 W213 S213 GLC X253 C253 GLE V167 GLS X167 S -series W222 W223 Technical data Power RMS / max. 60 / 120 Watts Frequency response 3,500 Hz – 25,000 Hz Impedance 4 Ω Efficiency 1W / 1m 89 dB Cone material TW: Coated silk dome M: – W: – Crossover Separate, 6 dB slope with 3-stage tweeter level adjustment Outer diameter TW: 43.1 mm / 1.70″