Helix IK E8.1-DVC2 MK2 – compact 8″ downfire ported subwoofer, ISM-ready
The IK E8.1-DVC2 MK2 is the 8″ member of the HELIX IMPACT downfire enclosure range. It combines a small footprint with strong low-frequency output, aimed at installations where both space and performance matter.
The downfire orientation spreads bass through the vehicle and protects the driver, while the ported enclosure delivers high SPL and deep extension for its size. The MK2 adds the new plug-in terminal with MOLEX connector and ISM readiness for conversion into an active subwoofer.
Key Features
- Downfire design: Bass dispersion via the vehicle floor and protection of the driver.
- Compact ported enclosure: Bass-reflex tuning at 43 Hz for high sound pressure and space-saving installation.
- 200 mm IK W8-DVC2 driver: High-power, long-excursion dual voice coil with a hand-scooped paper cone, converting amplifier power into bass with minimal compression.
- Flexible voice-coil wiring: The dual voice coil can be configured at the terminal as 1 x 1 Ω (for HELIX and MATCH monoblocks), 1 x 4 Ω (for bridged channels of multichannel amplifiers such as HELIX AMPLIFY) or 2 x 2 Ω (for parallel operation on multichannel units such as HELIX NEXT and MATCH UPGRADE).
- ISM-ready: Swapping the passive terminal for the optional IMPACT Subwoofer Module ISM 400.2DSP turns the IK E8.1-DVC2 MK2 into an active subwoofer – a direct-fit amplifier module with integrated DSP intended for upgrading modern vehicles with factory sound systems, without rebuilding the existing installation.
- Plug-in MK2 terminal: The new detachable terminal provides a screw connection for ordinary speaker cable plus a standardised MOLEX connector for custom wiring harnesses – HELIX flexibility combined with the plug & play approach of the MATCH ecosystem.
- Short-circuit protection: Because the plug is removed together with the cable, no bare wire ends are left loose in the vehicle, and the enclosure can be taken out and refitted in seconds.
- Secure placement: Velcro-backed feet.
- Durable finish: Carpet covering with an embroidered HELIX logo.
Drivers & Construction
One integrated HELIX IK W8-DVC2 chassis (200 mm / 8″) with hand-scooped paper cone and dual 2 Ω voice coils, firing downwards in a carpeted bass-reflex enclosure.
Acoustic Performance
- Power handling: 300 W RMS; recommended amplifier power 150–300 W RMS
- Impedance: 2 x 2 Ω, 1 x 4 Ω or 1 x 1 Ω (selectable at the terminal)
- Linear excursion (Xlin): ±8 mm; maximum mechanical excursion (Xmax): ±17 mm
- Port tuning frequency: 43 Hz
- Sensitivity: 89 dB @ 2.83 V / 1 m; 86 dB @ 1 W / 1 m
Installation Notes
- Dimensions (H x W x D): 184 x 310 x 290 mm (7.2 x 12.2 x 11.42″)
- Recommended DSP settings: “Self-define” high-pass at 44 Hz, Q 1.6; EQ filter at 115 Hz, Q 0.9, −3.5 dB
- Compatible IMPACT Subwoofer Module: HELIX ISM 400.2DSP
Technical Specifications
| IK E8.1-DVC2 MK2 | ||
| Power handling RMS | P | 300 Watts |
| Recommended amplifier power | RMS | 150 – 300 Watts |
| Impedance | z | 2 x 2 Ω / 1 x 4 Ω / 1 x 1 Ω |
| Max. linear excursion | Xlin | +/- 8 mm |
| Max. mechanical excursion | Xmax | +/- 17 mm |
| Port tuning frequency | Fb | 43 Hz |
| Sensitivity |
SPL |
89 dB @ 2.83V / 1m |
| Dimensions (H x W x D) |
184 x 310 x 290 mm |
|
| Integrated subwoofer chassis | HELIX IK W8-DVC2 | |
| Recommended DSP settings | “Self-define” highpass 44 Hz / Q = 1.6; EQ filter: 115 Hz / Q = 0.9 / -3.5 dB |
Scope of Delivery
1 x Downfire enclosure subwoofer IK E8.1-DVC2 MK2
1 x Data sheet
