Product overview
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.
Key features
- 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 specifications
| Power handling RMS / max. | 300 / 600 Watts |
|---|---|
| Impedance | 2 x 2 Ω |
| DC resistance | 2 x 1.6 Ω |
| Resonance frequency | 37 Hz |
| Mechanical Q factor | 3.56 |
| Electrical Q factor | 0.46 |
| Total Q factor | 0.41 |
| Compliance | 262 μm/N |
| Equivalent air volume | 17 L |
| Force factor | B*I | 10.7 Tm |
| Sensitivity | 89.0 dB @ 2.83V / 1m / 86.0 dB @ 1W / 1m |
| Cone area | 219 cm² |
| Moving mass | 69 g |
| Cone material | Hand-scooped paper cone |
| Mechanical resistance | 4.54 kg/s |
| Voice coil diameter | 50.8 mm |
| Voice coil winding height | 24 mm |
| Max. linear excursion | +/- 8.0 mm |
| Outer diameter | 213.5 mm / 8.40" |
| Installation diameter | 182 mm / 7.17" |
| Installation depth | 101 mm / 3.98" |
| Net volume (Sealed box) | 8 L |
| Lower limiting frequency (-3dB) (Sealed box) | 50 Hz |
| Recommended DSP settings (Sealed box) | 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 |
| Net volume (Vented box) | 8 L |
| Port diameter | 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) (Vented box) | 45 Hz |
| Recommended DSP settings (Vented box) | 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 |
What you are ordering
The exact HELIX model shown above, APEX catalogue SKU K330804. Review the listed inputs, outputs, impedance and system requirements before ordering.
Technical information verified against the official Audiotec Fischer product page.
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