Model Silk dome tweeter Diameter 25 mm / 0.98″ Power handling (RMS/max.) 70 / 110 Watts Impedance 4 Ohms Efficiency 89 dB Frequency Response 2500 Hz – 24 kHz Voice coil 25 mm / 1″ Cone Silk dome Mounting Ø 48 mm / 1.89″ Mounting depth 16 mm / 0.63″ Resonance frequency (Fs) 1550 Hz