SB21RDC-C000-4

SB ACOUSTICS SB21RDC-C000-4, 20mm (0.75in / 3/4in) RING DOME TWEETER, 4 ohm, 92mm Faceplate

SB ACOUSTICS SB21RDC-C000-4, 20mm RING DOME TWEETER Features Non-resonant diaphragm design for minimum high frequency break-up Dual balanced compression chamber for improved dynamics Copper cap for reduced voice coil inductance and minimum phase shift Saturation controlled motor system for low distortion Non-reflective rear 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 Specs Nominal Impedance 4 Ω DC resistance, Re 3.1 Ω Voice coil inductance, Le 0.04 mH Effective piston area, Sd 4.6 cm2 Voice coil diameter 20.4 mm Voice coil height 1.5 mm Air gap height 2.5 mm Linear coil travel (p-p) 1.0 mm Moving mass incl. air, Mms 0.25 g Free air resonance, Fs 760 Hz Sensitivity (2.83 V / 1 m) 90 dB Mechanical Q-factor, Qms 2.54 Electrical Q-factor, Qes 1.64 Total Q-factor, Qts 1.0 Force factor, Bl 1.5 Tm Rated power handling* 40 W Magnetic flux density 1.02 T Magnet weight 0.13 kg Net weight 0.33 kg * IEC 268-5, high-pass Butterworth, 2600 Hz, 12 dB/oct.