Helix Ci7 T20FM-SC

Technical data

Impedance Z 4 Ω
DC resistance Re 3.4 Ω
Frequency response 1,500 Hz - 30,000 Hz
Resonance frequency Fs 950 Hz
Sensitivity SPL 91.0 dB @ 2.83V / 1m
88.0 dB @ 1W / 1m
Voice coil diameter Ø 20 mm
Cone material Silk dome with coupling volume
Outer diameter 32 mm / 1.26"
Installation diameter 27.2 mm / 1.07"
Installation depth 19 mm / 0.75"

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