Power handling RMS / max. P 300 / 600 Watts Impedance Z 1 x 2 Ω DC resistance Re 1x 2 Ω Resonance frequency Fs 43 Hz Mechanical Q factor Qms 4.79 Electrical Q factor Qes 0.57 Total Q factor Qts 0.51 Compliance Cms 160 μm/N Equivalent air volume Vas 11 L Force factor B*I 11.9 Tm Sensitivity SPL 88.0 dB @ 2.83V / 1m 85.0 dB @ 1W / 1m Cone area Sd 222 cm² Moving mass Mms 82 g Cone material Sandwich paper cone Mechanical resistance Rms 4.7 kg/s Voice coil diameter ø 50.8 mm Voice coil winding height 19 mm Max. linear excursion Xmax +/- 6,0 mm Outer diameter ø 213 mm / 8.40″ Installation diameter ø 180.4 mm / 7.10″ Installation depth 79.5 mm / 3.13″ Recommended enclosure volumes Sealed box Net volume 10 L Lower limiting frequency (-3dB) 46 Hz Recommended DSP settings Recommended ″self-define″ highpass filter with 46 Hz cut-off frequency and Q = 1.5 additional EQ filter 100 Hz / Q = 1.0 / -2.5 dB Vented box Net volume 10 L Port diameter ø 60 mm / 2.36″ Port area 28 cm² Port length 42 cm / 16.5″ (angled port) Port tuning frequency Fb 39 Hz Lower limiting frequency (-3dB) 45 Hz Recommended DSP settings Recommended ″self-define″ highpass filter with 40 Hz cut-off frequency and Q = 1.2 additional EQ filter 100 Hz / Q = 0.9 / -2 dB Scope of delivery 1 x Subwoofer HELIX IK S8-DVC2 1x Grille 1 x Gasket 1x Connecting terminal 1 x Data sheet