SB ACOUSTICS SB34SWPL76-4, 34cm NOREX PAPER CONE SUBWOOFER 4OHMFeatures Long stroke design Linear high stability suspension Low damping rubber surround 3’’ copper voice coil Non-conducting reinforced fibre glass coil former Very stiff hard paper cone (made in-house) Vented cast aluminium chassis Large vented motor system and vented coilformer Long life silver lead wires Specs Nominal Impedance 4 Ω DC resistance, Re 3.5 Ω Voice coil inductance, Le 5.3 mH Effective piston area, Sd 458 cm2 Voice coil diameter 76 mm Voice coil height 38 mm Air gap height 8 mm Linear coil travel (p-p) 30 mm Magnetic flux density 0.62 T Magnet weight 2.4 kg Net weight 7.68 kg Free air resonance, Fs 19 Hz Sensitivity (2.83V/1m) 85 dB Mechanical Q-factor, Qms 8.6 Electrical Q-factor, Qes 0.34 Total Q-factor, Qts 0.33 Moving mass incl. air,Mms 266 g Force factor, Bl 18.0 Tm Equivalent volume, Vas 78.5 liters Compliance, Cms 0.26 mm/N Mechanical loss, Rms 3.7 kg/s Rated power handling* 300 W * IEC 268-5, T/S parameters measured on drive units that are broken in.
