Impedance Z 4 Ω DC resistance Re 3.2 Ω Frequency response 2,000 Hz – 25,000 Hz Resonance frequency Fs 1800 Hz Sensitivity SPL 91 dB @ 2.83V / 1m 88 dB @ 1W / 1m Voice coil diameter Ø 20 mm Cone material Titanium Outer diameter 32 mm / 1.26″ Installation diameter 28 mm / 1.10″ Installation depth 9.8 mm / 0.39″ Recommended crossover frequencies for the highpass Slope Minimum crossover frequency 6 dB/Octave 5,000 Hz 12 dB/Octave 3,500 Hz 24 dB/Octave 3,000 Hz