Helix IK W8 – DVC2 – 2 x 2 Ohms

Helix IK W8 – 200 mm / 8″ subwoofer for compact enclosures

Version: DVC2 – 2 x 2 Ohms

The Helix IK W8 is a 8-inch subwoofer chassis from HELIX based on the new KW chassis, with which Audiotec Fischer extends its IMPACT subwoofer line-up with powerful drivers for very compact enclosures. It is aimed at installers who need to make the most of limited space in a vehicle with a custom enclosure, without compromising acoustic performance.

The cone is made from hand-formed (hand-scooped) paper fibres and is extremely stiff. Together with a heavy-duty driver and a double-ventilated voice coil, it converts amplifier power into high sound pressure with minimal compression, and the manufacturer credits it with a subtle, pleasant tonal character. Available as SVC2 (1 x 2 Ohms) or DVC2 (2 x 2 Ohms), so it can be matched to mono, two-channel or multichannel amplifiers.

Key Features

• Compact-enclosure design: Strong magnet system tuned for compact enclosures – makes efficient use of limited space in the vehicle.
• Voice coil versions: Available as SVC2 (1 x 2 Ohms) or DVC2 (2 x 2 Ohms), so it can be matched to mono, two-channel or multichannel amplifiers.
• Hand-scooped paper cone: Extremely stiff cone of hand-formed paper fibres for fast, precise transient response.
• Double-ventilated voice coil: Minimises compression effects and supports high power handling.
• Long-excursion rubber surround: High mechanical load capacity; Xmax ±8.0 mm.
• Power handling: 300 W RMS / 600 W max (DVC2 data).
• Terminals: Solid push terminals.
• Protective magnet cover: Rugged cover with HELIX lettering protects the magnet.
• Grille and gasket included: Ready for custom enclosure builds; the data sheet gives enclosure recommendations including DSP settings.

Drivers & Construction

• Nominal size 200 mm / 8″; outer diameter 213.5 mm / 8.40″.
• Cone material: hand-scooped paper; effective cone area (Sd) 219 cm².
• Voice coil: 50.8 mm diameter, 24 mm winding height, double-ventilated.
• Long-excursion rubber surround and rugged magnet cover with HELIX lettering.
• Solid push terminals.

Acoustic Performance

The figures published on the product page refer to the DVC2 (2 x 2 Ohms) version; SVC2 values are given in its separate data sheet.

• Power handling: 300 W RMS / 600 W max.
• Impedance: 2 x 2 Ohms (DC resistance 2 x 1.6 Ohms).
• Sensitivity: 89.0 dB @ 2.83 V / 1 m; 86.0 dB @ 1 W / 1 m.
• Resonance frequency (Fs): 37 Hz.
• Q factors: Qms 3.56, Qes 0.46, Qts 0.41.
• Equivalent air volume (Vas): 17 l; compliance (Cms) 262 µm/N.
• Force factor: 10.7 Tm; moving mass (Mms) 69 g; mechanical resistance (Rms) 4.54 kg/s.
• Maximum linear excursion (Xmax): ±8.0 mm.

Installation Notes

• Installation (cut-out) diameter: 182 mm / 7.17″; installation depth: 101 mm / 3.98″.
• Recommended sealed enclosure (DVC2): 8 l net volume, -3 dB at 50 Hz; suggested DSP high-pass 50 Hz (Q 1.5) plus EQ 115 Hz, Q 1.0, -2.5 dB.
• Recommended vented enclosure (DVC2): 8 l net volume, port Ø 60 mm (28 cm²), 42 cm angled port, tuned to 43 Hz, -3 dB at 45 Hz; suggested DSP high-pass 43 Hz (Q 1.5) plus EQ 120 Hz, Q 0.8, -3.5 dB.

Technical Specifications

Scope of Delivery

1 x Subwoofer HELIX IK W8-DVC2
1 x Grille
1 x Gasket
1 x Data sheet