SB ACOUSTICS SB17NRX2C35-8, 17cm NOREX PAPER CONE WOOFER 8OHMFeatures Vented cast aluminum chassis for optimum strength and low compression Proprietary cone material with natural fibers made in-house Soft low damping rubber surround for transient response Non-conducting fiber glass voice coil former for minimum damping Extended copper sleeve on pole piece for low inductance and low distortion Vented coil former CCAW voice coil for reduced moving mass Long life silver lead wires Vented pole piece for reduced compression Specs Nominal Impedance 8 Ω DC resistance, Re 5.7 Ω Voice coil inductance, Le 0.15 mH Effective piston area, Sd 118 cm2 Voice coil diameter 35.5 mm Voice coil height 16 mm Air gap height 5 mm Linear coil travel (p-p) 11 mm Magnetic flux density 0.93 T Magnet weight 0.54 kg Net weight 1.56 kg Free air resonance, Fs 36.5 Hz Sensitivity (2.83V/1m) 87 dB Mechanical Q-factor, Qms 4.55 Electrical Q-factor, Qes 0.47 Total Q-factor, Qts 0.42 Moving mass incl. air,Mms 13.9 g Force factor, Bl 6.25 Tm Equivalent volume, Vas 27 liters Compliance, Cms 1.37 mm/N Mechanical loss, Rms 0.7 kg/s Rated power handling* 50 W * IEC 268-5, T/S parameters measured on drive units that are broken in.
