Helix IK ER8.1-DVC2 MK2

Helix IK ER8.1-DVC2 MK2 – flat 8″ round spare-wheel subwoofer, ISM-ready

The IK ER8.1-DVC2 MK2 is a single-driver HELIX IMPACT round enclosure developed for flat spare wheel recesses. HELIX sums it up as impressive bass performance with minimal space requirements.

A carefully tuned vented cabinet and the shallow IK S8-DVC2 driver with sandwich paper cone and heavy-duty motor deliver deep bass in confined spaces. The MK2 adds the plug-in terminal with MOLEX connector and ISM readiness for an active upgrade.

Key Features

• Flat round enclosure: 120 mm overall height for flat spare wheel recesses.
• Vented construction: Bass-reflex tuning at 42 Hz for sound quality and bass dispersion throughout the vehicle.
• 200 mm IK S8-DVC2 driver: Sandwich paper cone and heavy-duty motor system.
• 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 ER8.1-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.
• Flush-mounted chassis: Space-saving design with added protection and a slim look.
• Durable finish: Carpet surface with an embroidered HELIX logo.
• Mounting kit included: For securing the enclosure in the spare wheel recess.

Drivers & Construction

One flush-mounted HELIX IK S8-DVC2 chassis (200 mm / 8″) with sandwich paper cone and dual 2 Ω voice coils in a round, carpeted vented 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): ±6 mm; maximum mechanical excursion (Xmax): ±12 mm
• Port tuning frequency: 42 Hz
• Sensitivity: 88 dB @ 2.83 V / 1 m; 85 dB @ 1 W / 1 m

Installation Notes

• Dimensions (diameter x height): 580 x 120 mm (22.8 x 4.7″)
• Mounting kit included
• Recommended DSP settings: “Self-define” high-pass at 35 Hz, Q 1.0; no EQ filter required
• Compatible IMPACT Subwoofer Module: HELIX ISM 400.2DSP

Technical Specifications

Scope of Delivery

1 x Round ported subwoofer IK ER8.1-DVC2 MK2
1 x Mounting kit
1 x Data sheet