SB ACOUSTICS SB23NRXS45-8, 23cm NOREX PAPER CONE WOOFER 8OHMFeatures Soft low damping rubber surround for improved transient response Shorting ring in motor system for reduced distortion Vented pole piece for reduced compression Vented cast aluminum chassis for optimum strength and low compression Shallow design Non-conducting fiber glass voice coil former for minimum damping CCAW voice coil for reduced moving mass Long life silver lead wires Specs Nominal Impedance 8 Ω DC resistance, Re 5.6 Ω Voice coil inductance, Le 0.60 mH Effective piston area, Sd 216 cm2 Voice coil diameter 45.5 mm Voice coil height 19 mm Air gap height 6 mm Linear coil travel (p-p) 13 mm Magnetic flux density 0.86 T Magnet weight 0.8 kg Net weight 2.74 kg Free air resonance, Fs 27 Hz Sensitivity (2.83V/1m) 88.5 dB Mechanical Q-factor, Qms 5.4 Electrical Q-factor, Qes 0.41 Total Q-factor, Qts 0.38 Moving mass incl. air,Mms 24.5 g Force factor, Bl 7.5 Tm Equivalent volume, Vas 94 liters Compliance, Cms 1.42 mm/N Mechanical loss, Rms 0.77 kg/s Rated power handling* 60 W * IEC 268-5, T/S parameters measured on drive units that are broken in.
