• K331205
  • DE 29323089


Stunning bass performance out of compact dimensions 

With the new KW chassis, we’re expanding our IMPACT subwoofer lineup, offering powerful drivers for use in very compact enclosures. Especially when it comes to the most efficient usage of available space in the vehicle regarding an individual enclosure design, these woofers create completely new installation possibilities without ever compromising the acoustic performance.

Clever down to the last detail

The extremely stiff cone made of hand-scooped paper fibers in connection with the heavy-duty driver system not only converts amplifier power easily and without compression effects into loads of sound pressure, but also scores sonically with subtle beats. 

Flexible connection – 2 x 2 or 1 x 2 Ohms

The chassis are available as 1 x 2 Ohms (SVC2) or 2 x 2 Ohms (DVC2) version. Thus, these subwoofers always offers the right solution for every amplifier configuration to get the maximum performance out of it – whether mono, 2-channel or even multi-channel amplifier. 

"All inclusive" for self-made enthusiasts

In addition, the solid protective grille and gasket are also included. For optimal bass performance in DIY installations you can find recommendations for sealed and vented enclosures with all parameters such as net volume, port tuning frequency as well as DSP settings in our technical data sheet.


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

Technical data

    IK W12-DVC2 – 2 x 2 Ohms
Power handling RMS / max.  P 300 / 600 Watt
Impedance  Z 2 x 2 Ω
DC resistance  Re 2 x 1.6 Ω
Resonance frequency  Fs 32 Hz
Mechanical Q factor  Qms 3.70
Electrical Q factor  Qes 0.46
Total Q factor Qts 0.41
Compliance Cms 179 μm/N
Equivalent air volume Vas 66 L
Force factor  B*I 13.7 Tm
Sensitivity SPL

93.0 dB @ 2.83V / 1m
90.0 dB @ 1W / 1m

Cone area  Sd 515 cm²
Moving mass  Mms 134 g
Cone material   Hand-scooped paper cone
Mechanical resistance  Rms 7.33 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 286 mm / 11.26
Installation depth   144 mm / 5.67"
Recommended enclosure volumes  
Sealed box  
Net volume   22 L
Lower limiting frequency (-3dB)   40 Hz
Recommended DSP settings   “Self-Define” Highpass: 37 Hz / Q = 1.6;
EQ Filter: 90 Hz / Q = 1.5 / -3 dB
Vented box  
Net volume   30 L
Port diameter ø 100 mm / 3.94"
Port area   78 cm²
Port length   28 cm / 9.84"
Port tuning frequency Fb 39 Hz
Lower limiting frequency (-3dB)   39 Hz
Recommended DSP settings   “Self-Define” Highpass: 36 Hz / Q = 1.3;
EQ Filter: 100 Hz / Q = 0.85 / -2 dB

Scope of delivery

1 x Subwoofer HELIX IK W12-DVC2
1 x Grille
1 x Gasket
1 x Data sheet

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