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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