Helix K 8W-DVC2

Power RMS / max. 300 / 600 Watts Impedance 2 x 2 Ω DC resistance Re2 x 1.6 Ω Fs37 Hz Qms3.56 Qes0.46 Qts0.41 Cms262 μm/N Vas17 L B*I10.7 Tm Efficiency 1 W / 1 m SPL 86.0 dB Sd 219 cm² Moving mass Mms69 g Cone material: Hand-scooped paper cone Mechanical resistance Rms4.54 kg/s Voice coil diameter: 50.8 mm Voice coil winding height: 24 mm Xmax+/- 8.0 mm Outer diameterø: 213 mm / 8.38″ Installation diameter: 182 mm / 7.17″ Installation depth: 101 mm / 3.98″.