Product overview
Flat dimensions – deep bass
With the shallow HELIX IK S subwoofers, the realization of particularly flat and compact enclosure designs shouldn’t be a problem anymore. Its extremely low installation depth opens up new installation possibilities that do not require making any acoustic compromises at all. Additionally, thanks to the use of large voice coils and its low resonant frequency, the HELIX IK S series delivers an absolutely stunning bass performance, which is in no way inferior to larger dimensioned woofers.
Smart down to the very last detail
The enormously stiff sandwich paper cone in conjunction with our heavy-duty drive system easily converts amplifier power into powerful sound pressure without any compression effects, while simultaneously demonstrating finesse when it comes to more subtle beats. A special highlight: the magnet system has a threaded hole on the back and thus allows the woofer to be fixed to the back panel of the enclosure. Since every millimeter of depth counts in flat constructions, enclosure vibrations are effectively reduced – even with thin walls.
Flexible connection
Designed as a 1 x 2 Ohms (SVC2) or 2 x 2 Ohms (DVC2) variant, you can find the right low bass specialist for any amplifier configuration to get the maximum performance out of it.
"All inclusive" for self-made enthusiasts
In addition to the high-quality connection terminal with gold-plated screw terminals, a 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 or DSP settings in our technical data sheet.
Key features
- Chassis with particularly low installation depth – optimized for compact and shallow enclosure constructions
- 2 x 2 Ohms dual voice coil for flexible system configuration
- Magnet system with threaded hole on the back – allows screwing to the back panel of the enclosure for stabilization and reduction of enclosure vibrations
- Extremely stiff sandwich paper cone
- Long-excursion rubber surround for highest mechanical rating
- Rugged magnet cover with HELIX lettering for perfect magnet protection
- Enclosure connection terminal, 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 | 34 Hz |
| Mechanical Q factor | 6.37 |
| Electrical Q factor | 0.49 |
| Total Q factor | 0.45 |
| Compliance | 198 μm/N |
| Equivalent air volume | 34 L |
| Force factor | B*I | 12.7 Tm |
| Sensitivity | 90.0 dB @ 2.83V / 1m / 87.0 dB @ 1W / 1m |
| Cone area | 353 cm² |
| Moving mass | 112 g |
| Cone material | Sandwich paper cone |
| Mechanical resistance | 3.73 kg/s |
| Voice coil diameter | 50.8 mm |
| Voice coil winding height | 18 mm |
| Max. linear excursion | +/- 6.0 mm |
| Outer diameter | 262 mm / 10.31" |
| Installation diameter | 229 mm / 9.01" |
| Installation depth | 84.5 mm / 3.33" |
| Net volume (Sealed box) | 14 L |
| Lower limiting frequency (-3dB) (Sealed box) | 46 Hz |
| Recommended DSP settings (Sealed box) | Recommended "self-define" highpass filter with 45 Hz cut-off frequency and Q = 1.3; / additional EQ filter 100 Hz / Q = 1.0 / -3 dB |
| Net volume (Vented box) | 16 L |
| Port diameter | 70 mm / 2.76" |
| Port area | 38 cm² |
| Port length | 38 cm / 14.96" |
| Port tuning frequency | Fb | 37 Hz |
| Lower limiting frequency (-3dB) (Vented box) | 39 Hz |
| Recommended DSP settings (Vented box) | Recommended "self-define" highpass filter with 37 Hz cut-off frequency and Q = 1.2; / additional EQ filter 95 Hz / Q = 0.7 / -3 dB |
What you are ordering
The exact HELIX model shown above, APEX catalogue SKU K331004. 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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