Helix IQ W8-DVC2

Helix IQ W8-DVC2 – 8″ audiophile subwoofer with Tuneable Mass System

The IQ W8-DVC2 is the 8-inch model of the HELIX IQ subwoofer range, a high-performance subwoofer for listeners who want both high output and sound quality from compact enclosures. It is optimised for high-power amplifiers (recommended 300 to 750 W RMS) and suits sealed boxes as well as high-output bass reflex systems.

The proprietary Tuneable Mass System (TMS) changes the moving mass via weights on the dustcap: lower mass for higher efficiency and faster transients, added mass for lower resonance and deeper bass in sealed or low-tuned reflex boxes. A 3-layer fiberglass-Mylar honeycomb cone, a large vented pole piece with airflow-optimised basket and a die-cast aluminium basket with integrated grille keep distortion low and the driver stable even at extreme excursion.

Key Features

• Audiophile grade: low-frequency extension and accurate dynamics.
• High power: 750 W RMS / 1,500 W max power handling.
• Tuneable Mass System: three supplied tuning masses for fine-tuning T/S parameters before or after installation.
• Honeycomb cone: 3-layer fiberglass-Mylar for precision and internal damping.
• Dual 2 Ω voice coil: wiring as 2 x 2 Ω, 1 Ω or 4 Ω for monoblocks and multi-sub systems.
• Cooling: vented pole piece and airflow-optimised basket limit overheating and thermal compression.
• Space-saving: sealed boxes from just 6 l net.
• Sealed or bass reflex: recommended box designs for both.
• Die-cast aluminium basket: with integrated protective grille.
• Long excursion: ±12 mm linear excursion.

Drivers & Construction

200 mm driver with fiberglass-Mylar honeycomb cone (222 cm² cone area), 63 mm dual voice coil with 32 mm winding height, vented pole piece and die-cast aluminium basket with integrated grille.

Acoustic Performance

Power handling 750 W RMS / 1,500 W max, recommended amplifier power from 300 W RMS, impedance 2 x 2 Ω (Re 2 x 1.9 Ω), sensitivity 86 dB at 2.83 V/1 m (83 dB at 1 W/1 m). Fixed T/S data: Qms 5.30, Cms 123 µm/N, Vas 8.5 l, BL 15.5 Tm, Rms 5.8 kg/s, Xmax ±12 mm. Depending on tuning mass (none / +1 / +2 / +3 TM): Fs 43 / 37 / 33 / 30 Hz, Mms 115 / 168 / 221 / 274 g, Qes 0.49 / 0.56 / 0.68 / 0.76, Qts 0.45 / 0.51 / 0.60 / 0.67.

Installation Notes

Outer diameter 226 mm (8.90″), installation diameter 183 mm (7.21″), installation depth 114.5 mm (4.51″). Recommended sealed enclosures range from 6 to 35 l net (lower -3 dB limit from 69 Hz down to 32 Hz). Recommended bass reflex enclosures range from 13 to 38 l net with a 60 mm port (28 cm²), port lengths 40–51 cm and tuning from 38 Hz down to 20 Hz (-3 dB from 35 Hz down to 17 Hz).

Technical Specifications

Scope of Delivery

1 x Subwoofer IQ W8-DVC2
1 x Installation gasket
2 x Mounting material
1 x Grille
2 x Grille removal tool
3 x Tuning mass (TM)
1 x Data sheet