SB ACOUSTICS SATORI, TW29R 29mm RING DOME TWEETER SILVER 4OHMFeatures Non-resonant diaphragm design for minimum high frequency break-up Two part aluminium faceplate with integrated mechanical decoupling Dual balanced compression chambers for improved dynamics Dual copper caps for absolute minimum voice coil inductance and minimum phase shift Saturation controlled motor system with T-shaped pole piece for lower distortion Non-reflective cast aluminium chamber with optimized damping for improved dynamics Flow optimized vented pole piece for optimum coupling to rear chamber CCAW voice coil for low moving mass Long life silver lead wires Low resonance frequency for extended range Specs Nominal Impedance 4 Ω DC resistance, Re 3.0 Ω Voice coil inductance, Le 0.02 mH Effective piston area, Sd 9.6 cm2 Voice coil diameter 29.0 mm Voice coil height 2.0 mm Air gap height 2.5 mm Linear coil travel (p-p) 0.5 mm Moving mass incl. air, Mms 0.44 g Free air resonance, Fs 600 Hz Sensitivity (2.83 V / 1 m) 92 dB Mechanical Q-factor, Qms 2.0 Electrical Q-factor, Qes 1.24 Total Q-factor, Qts 0.77 Force factor, Bl 2.0 Tm Rated power handling* 80 W Magnetic flux density 1.0 T Magnet weight 0.22 kg Net weight 0.53 kg * IEC 268-5, high-pass Butterworth, 2600 Hz, 12 dB/oct.