SB ACOUSTICS SB34NRXL75-8, 34cm NOREX PAPER CONE WOOFER 8OHMFeatures Hard paper cone for improved piston operation (made in-house) Large motor system with under-cut pole piece and dual shorting rings Vented pole piece for minimum compression Vented cast aluminium chassis for optimum strength and low compression 3″ copper voice coil for improved power handling Long life silver lead wires Low damping rubber surround for improved dynamic linearity Non-conducting fibre glass voice coil former for minimum damping Optimized for vented enclosure Specs Nominal Impedance 8 Ω DC resistance, Re 6.2 Ω Voice coil inductance, Le 1.2 mH Effective piston area, Sd 508 cm2 Voice coil diameter 75.6 mm Voice coil height 28 mm Air gap height 8 mm Linear coil travel (p-p) 20 mm Magnetic flux density 1.1 T Magnet weight 3.6 kg Net weight 8.9 kg Free air resonance, Fs 22 Hz Sensitivity (2.83V/1m) 91 dB Mechanical Q-factor, Qms 5.5 Electrical Q-factor, Qes 0.29 Total Q-factor, Qts 0.28 Moving mass incl. air,Mms 93 g Force factor, Bl 16.6 Tm Equivalent volume, Vas 205 liters Compliance, Cms 0.56 mm/N Mechanical loss, Rms 2.35 kg/s Rated power handling* 200 W * IEC 268-5, T/S parameters measured on drive units that are broken in.
