Technical data 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 94.0 dB @ 2.83V / 1m 91.0 dB @ 1W / 1m Voice coil diameter Ø 25 mm Cone material Aluminum with ceramic coating Outer diameter 40 mm / 1.57″ Installation diameter 38 mm / 1.50″ Installation depth 11.7 mm / 0.46″ Recommended crossover frequencies for the highpass Slope Minimum crossover frequency 6 dB/Octave 4,000 Hz 12 dB/Octave 3,000 Hz 24 dB/Octave 2,500 Hz Compatibility FlexMount25 WireKits Scope of delivery 2 x Ci5 T25FM-CA 2 x Tweeter flush mount 2 x Tweeter pod 2 x Mounting material 1 x Instruction manual