Helix K 10W 10” Compact Subwoofer with 2 x 2 Ohms Dual Voice Coil


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10” subwoofer with 2 x 2 Ohms dual voice coil for compact vented enclosures.



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Do-it-yourselfers, here’s your chance to create your personal sub that perfectly fits into your car! From the technical point of view the two drivers K 10W and K12W are absolutely identical with the subwoofers that are installed in the K series enclosure subs. Just have a look at the Thiele/Small parameters and you will easily notice that those are designed for compact vented cabinets yet leaving plenty of “headroom” for designing your own preferred sound characteristic. If you prefer to play it safe, just choose the same net volume and port tuning frequency like our enclosure subs K 10E and K 12E for outstanding bass performance. So what are you waiting for? Start your “tailor-made subwoofer project” right now!


  • Extremely stiff, hand-scooped paper cone
  • Double ventilated voice coil for minimum compression effects and high power handling
  • Long-excursion rubber surround for highest mechanical rating
  • Very long linear excursion
  • 2 x 2 Ohms dual voice coil for flexible system configuration
  • Solid push terminals
  • Powerful magnet system for compact vented enclosures
  • Rugged magnet cover with HELIX lettering for perfect magnet protection
  • Grille and gasket included in delivery


Power RMS / max.  P 300 / 600 Watts
Impedance  Z 2 x 2 Ω
DC resistance  Re 2 x 1.6 Ω
Resonance frequency  Fs 36 Hz
Mechanical Q factor  Qms 4.50
Electrical Q factor  Qes 0.43
Total Q factor Qts 0.39
Compliance Cms 218 μm/N
Equivalent air volume Vas 34 L
Force factor  B*I 12.3 Tm
Efficiency 1 W / 1 m SPL 88.0 dB
Cone area  Sd 333 cm²
Moving mass  Mms 91 g
Cone material   Hand-scooped paper cone
Mechanical resistance  Rms 4.56 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 262 mm / 10.31″
Installation diameter ø 232 mm / 9.13″
Installation depth   126 mm / 4.96″
Recommended enclosure volumes 
Sealed box 
Net volume   12 L
Lower limiting frequency (-3dB)   53 Hz
Vented box 
Net volume   19 L
Port diameter ø 70 mm / 2.76″
Port area   38 cm²
Port length   22 cm / 8.66″
Port tuning frequency Fb 43 Hz
Lower limiting frequency (-3dB)   43 Hz


1 x Subwoofer HELIX K 10W 1x Grille 1 x Gasket 1 x Data sheet

0.0000 kg
cable type



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Helix K 10W



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Made in Germany, HELIX produces the most sophisticated car Hi-Fi components with its decades of experience.