SB ACOUSTICS SB29RDNC-C000-4, 29mm RING DOME NEODYMIUM TWEETERFeatures Non-resonant diaphragm design for minimum high frequency break-up CCAW voice coil for low moving mass Long life silver lead wires Low resonance frequency Copper cap on pole piece for reduced voice coil inductance and minimum phase shift Inherently shielded neodymium motor system Internal pressure equalization and flow resistor for non-resonant coupling of cavities Compact design Specs Nominal Impedance 4 Ω DC resistance, Re 3.0 Ω Voice coil inductance, Le 0.05 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 0.45 g Free air resonance, Fs 680 Hz Sensitivity (2.83 V / 1 m) 94 dB Mechanical Q-factor, Qms 1.2 Electrical Q-factor, Qes 0.72 Total Q-factor, Qts 0.45 Force factor, Bl 2.6 Tm Rated power handling* 100 W Magnetic flux density 1.2 T Magnet weight 31 g Net weight 0.17 kg * IEC 268-5, high-pass Butterworth, 2600 Hz, 12 dB/oct.
