HELIX K 8W

HELIX K 8W

Do-it-yourselfers, here's your chance to create your personal subwoofer box, to fit perfect into your car!

From the technical point of view the drivers K 8W, K 10W and K 12W 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 and sealed cabinets, yet leaving plenty of "headroom" for designing your own preferred sound characteristic.

If you prefer it to play safe, just choose the net volume, port tuning frequency and DSP settings as recommended in the technical data for outstanding bass performance.

So what are you waiting for? Start your "tailor-made subwoofer project" right now!

Features

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

Technical data

Power RMS / max. P 300 / 600 Watts
Impedance  Z 2 x 2 Ω
DC resistance  Re 2 x 1.6 Ω
Resonance frequency  Fs 37 Hz
Mechanical Q factor  Qms 3.56
Electrical Q factor  Qes 0.46
Total Q factor Qts 0.41
Compliance Cms 262 μm/N
Equivalent air volume Vas 17 L
Force factor  B*I 10.7 Tm
Efficiency 1 W / 1 m SPL 86.0 dB
Cone area  Sd 219 cm²
Moving mass  Mms 69 g
Cone material   Hand-scooped paper cone
Mechanical resistance  Rms 4.54 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 213 mm / 8.38"
Installation diameter ø 182 mm / 7.17"
Installation depth   101 mm / 3.98"
     
Recommended enclosure volumes    
Sealed box    
Net volume   8 L
Lower limiting frequency (-3dB)   50 Hz
Recommended DSP settings   Recommended "self-define" highpass filter with 50 Hz cut-off frequency and Q = 1.5,
additional EQ filter 115 Hz / Q = 1.0 / -2.5 dB
     
Vented box    
Net volume   8 L
Port diameter ø 60 mm / 2.36"
Port area   28 cm²
Port length   42 cm / 16.5"   (angled port)
Port tuning frequency Fb 43 Hz
Lower limiting frequency (-3dB)   45 Hz
Recommended DSP settings   Recommended "self-define" highpass filter with 43 Hz cut-off frequency and Q = 1.5,
additional EQ filter 120 Hz / Q = 0.8 / -3.5 dB

Scope of delivery

1 x Subwoofer HELIX K 8W
1 x Grille
1 x Gasket
1 x Data sheet
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