SB ACOUSTICS SW26SFC38-4, 27cm PAPER CONE SHALLOW SUBWOOFER 4OHMFeatures Shallow light weight design Hard pressed vented paper cone (made in-house) Inverted low damping rubber surround Symmetric suspension Stacked neodymium motor with built-in soft limiting Non-conducting fiber glass coil former long life lead wires Specs Nominal impedance, 4 Ω DC resistance, Re 3.5 Ω Voice coil inductance, Le 1.27 mH Effective piston area, Sd 340 cm2 Voice coil diameter 38.5 mm Voice coil height 16 mm Air gap height 9 mm Linear coil travel (p-p) 7 mm Magnetic flux density 0.72 T Magnet weight 0.1 kg Net weight 0.94 kg Free air resonance, Fs 28 Hz Sensitivity (2.83 V / 1 m) 92 dB Mechanical Q-factor, Qms 5.04 Electrical Q-factor, Qes 0.33 Total Q-factor, Qts 0.31 Moving mass incl.air, Mms 63 g Force factor, BI 10.8 Tm Equivalent volume, Vas 84 liters Compliance, Cms 0.51 mm/N Mechanical loss, Rms 2.2 kg/s Rated power handling* 80 W * IEC 268-5, T/S parameters measured on drive units that are broke in.
