SB ACOUSTICS SW26DBAC76-4, 27cm BLACK ALUMINUM CONE SHALLOW SUBWOOFER 4OHMFeatures Unique patented long through shallow design Vented cast aluminum chassis for optimum strength and low compression Dual rigid aluminum cone structure Non-conducting fiber glass coil former for minimum damping Shorting ring in motor system for reduced distortion 3 copper voice coil for improved power handling Long life insulated silver lead wires Powerful neodymium motor system Specs Nominal Impedance 4 Ω DC resistance, Re 3.2 Ω Effective piston area, Sd 312 cm2 Voice coil diameter 75.5 mm Voice coil height 30 mm Air gap height 6 mm Linear coil travel (p-p) 24 mm Magnetic flux density 1.0 T Magnet weight 281 g Net weight 3.43 kg Free air resonance, Fs 22 Hz Sensitivity (2.83V/1m) 86 dB Mechanical Q-factor, Qms 4.5 Electrical Q-factor, Qes 0.51 Total Q-factor, Qts 0.46 Moving mass incl. air,Mms 134 g Force factor, Bl 10.8 Tm Equivalent volume, Vas 54 ltr. Compliance, Cms 0.39 mm/N Mechanical loss, Rms 4.1 kg/s Rated power handling* 200 W * IEC 268-5, T/S parameters measured on drive units that are broken in.
