Power RMS / max. P 80 / 120 Watts (highpass 400 Hz at 24 dB/Oct.) Impedance Z 4 Ω DC resistance Re 3.1 Ω Frequency response 400 Hz – 20.000 Hz Resonance frequency Fs 165 Hz Mechanical Q factor Qms 8.90 Electrical Q factor Qes 0.55 Total Q factor Qts 0.52 Compliance Cms 720 μm/N Equivalent air volume Vas 0.24 L Force factor B*I 2.6 Tm Efficiency 1 W / 1 m SPL 84 dB Cone area Sd 15 cm² Moving mass Mms 1.6 g Cone material Aluminum cone Mechanical resistance Rms 0.13 kg/s Voice coil diameter ø 19 mm / 0,75″ Voice coil winding height 5 mm / 0.2″ Max. linear excursion Xmax +/- 1.0 mm Outer diameter ø 60 mm / 2.36″ Installation diameter ø 53 mm / 2.1″ Installation depth 26.8 mm / 1.1″ Recommended enclosure volumes Sealed box with minimum 250 ml net volume Net volumes Recommended DSP / amplifier settings 0.25 liter (System resonance: 200 Hz) Crossover frequency: 600 Hz Min. filter slope: 12 dB/Oct. 0.5 liter (System resonance: 155 Hz) Crossover frequency: 450 Hz Min. filter slope: 12 dB/Oct. 0.75 liter (System resonance: 140 Hz) Crossover frequency: 300 Hz Min. filter slope: 24 dB/Oct.