SB ACOUSTICS SB36WBAC21-4, 36mm ALUMINUM CONE MINIATURE SPEAKER 4OHMFeatures Long stroke design Vented low compression design Resonance and break-up control Ferrofluid Cooled Low resonance frequency Prepared for rear mounting Long life lead wires Specs Nominal Impedance 4 Ω DC resistance, Re 3.4 Ω Voice coil inductance, Le 0.12 mH Effective piston area, Sd 4.2 cm2 Voice coil diameter 20.4 mm Voice coil height 5.5 mm Air gap height 2.0 mm Linear coil travel (p-p) 3.5 mm Magnetic flux density 0.85 T Magnet weight (NEO) 0.01 kg Net weight 0.055 kg Free air resonance, Fs 200 Hz Sensitivity (2.83 V / 1 m) 77 dB Mechanical Q-factor, Qms 0.68 Electrical Q-factor, Qes 1.05 Total Q-factor, Qts 0.41 Moving mass incl. air, Mms 0.76 g Force factor, Bl 1.76 Tm Equivalent volume, Vas 0.021 liters Compliance, Cms 0.83 mm/N Mechanical loss, Rms 1.4 kg/s Rated power handling* 5 W * IEC 268-5, high-pass Butterworth, 200 Hz, 12 dB/oct, T/S parameters measured on drive units that are broken in.
