Product overview
Compact, space-saving, and designed for deep bass performance: The HELIX IK ER8.1 is the perfect subwoofer for seamless integration into flat spare wheel recesses. Its exceptional shallow round enclosure makes it an ideal choice for a space-optimized installation without compromising on a proper low frequency reproduction.
Outstanding bass in minimal space
The sophisticated, vented construction of the IK ER8.1 ensures outstanding sound quality and superior bass dispersion, delivering rich, powerful low frequencies across the vehicle. Equipped with an 8” (200 mm) woofer featuring a sandwich paper cone, this subwoofer brings impressive deep bass to even the tightest spaces.
Flexible installation and configuration
Thanks to the pluggable screw terminal, installing or removing the subwoofer is quick and secure. Additionally, with the choice between a 1 x 2 Ohms (SVC2) or 2 x 2 Ohms (DVC2) configuration, there is a perfect deep bass specialist for every amplifier setup to maximize power output.
Built for durability
The subwoofer chassis is flush-mounted, ensuring a sleek, space-saving design while providing enhanced protection. The enclosure features a sturdy carpet surface with the embroidered HELIX logo, adding both style and resilience to the unit. For added security, the included mounting kit ensures reliable fixation within the spare wheel recess.
Key features
- Compact, shallow round enclosure designed for space-optimized integration in flat spare wheel recesses
- Sophisticated, vented construction design delivers outstanding sound quality and ideal bass dispersion in the vehicle
- Equipped with one powerful 200 mm / 8” woofer with sandwich paper cone for rich, deep bass
- Pluggable screw terminal for quick and safe installation and removal
- Voice coil impedance configurable via connection terminal allows flexible system configuration – 2 x 2 Ohms, 1 x 4 Ohms or 1 x 1 Ohm
- Flush-mounted subwoofer chassis for space-saving design and enhanced protection
- Sturdy carpet surface with embroidered HELIX logo
- Including mounting kit which facilitate secure fixation of the enclosure in spare wheel recesses (see data sheet)
Technical specifications
| Power handling RMS | 300 Watts |
|---|---|
| Recommended amplifier power | 150 – 300 Watts |
| Impedance | 2 x 2 Ω / 1 x 4 Ω / 1 x 1 Ω |
| Max. linear excursion | +/- 6.0 mm |
| Port tuning frequency | Fb | 42 Hz |
| Sensitivity | 88 dB @ 2.83V / 1m / 85 dB @ 1W / 1m |
| Dimensions (D x H) | 580 x 120 mm / / 22.8 x 4.7” |
| Integrated subwoofer chassis | HELIX IK S8-DVC2 |
| Recommended DSP settings | "Self-define" highpass 35 Hz / Q = 1.0; / EQ filter: not required |
What you are ordering
The exact HELIX model shown above, APEX catalogue SKU K330812. 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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