Size without housing: Tweeter outer Ø 32.00 Mounting Ø 27.2mm Mounting depth: 19mm Impedance: 4 Ohm DC resistance: ( Re ) 3.4 Ohm Frequency response: 1500 Hz – 30000 Hz Sensitivity ( SPL ): 93 dB @ 2.83V / 1m, 90 dB @ 1W / 1m Voice coil diameter: 20mm Cone material: Silk dome with coupling volume Recommended crossover frequencies for the highpass: Slope 6dB/octave│minmum crossover frequency 4000Hz Slope 12 dB /octave│minmum crossover frequency 3000Hz Slope 24 dB /octave│minmum crossover frequency 2500Hz Compatibility FlexMount20 Scope of delivery 2 x Ci7 T20FM-SC 2 x Tweeter flush mount 2 x Tweeter pod 2 x Extension cable 2 x Mounting material