Power handling RMS / max. P 300 / 600 Watts Impedance Z 1 x 2 Ω DC resistance Re 1 x 2 Ω Resonance frequency Fs 36 Hz Mechanical Q factor Qms 5.41 Electrical Q factor Qes 0.52 Total Q factor Qts 0.48 Compliance Cms 95 μm/N Equivalent air volume Vas 40 L Force factor B*I 17.2 Tm Sensitivity SPL 91.0 dB @ 2.83V / 1m 88.0 dB @ 1W / 1m Cone area Sd 523 cm² Moving mass Mms 220 g Cone material Sandwich paper cone Mechanical resistance Rms 7.9 kg/s Voice coil diameter ø 50.8 mm Voice coil winding height 24 mm Max. linear excursion Xmax +/- 8.0 mm Outer diameter ø 316 mm / 12.44″ Installation diameter ø 276.8 mm / 10.90″ Installation depth 95.5 mm / 3.76″ Recommended enclosure volumes Sealed box Net volume 22 L Lower limiting frequency (-3dB) 39 Hz Recommended DSP settings Recommended ″self-define″ highpass filter with 35 Hz cut-off frequency and Q = 1.5 additional EQ filter 75 Hz / Q = 1.5 / -3 dB Vented box Net volume 40 L Port diameter ø 100 mm / 3.94″ Port area 78 cm² Port length 32 cm / 12.6″ Port tuning frequency Fb 36 Hz Lower limiting frequency (-3dB) 37 Hz Recommended DSP settings Recommended ″self-define″ highpass filter with 36 Hz cut-off frequency and Q = 1.0 additional EQ filter 75 Hz / Q = 0.7 / -2 dB Scope of delivery 1 x Subwoofer HELIX IK S12-DVC2 1x Grille 1 x Gasket 1x Enclosure connecting terminal 1 x Data sheet