HELIX IQ W12-DVC2 subwoofer 12"

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Audiophile Sound Quality with Maximum Adaptability

The HELIX IQ W12-DVC2 sets new standards in high-performance subwoofers. Designed for discerning music lovers who appreciate both powerful sound levels and precise sound quality, this subwoofer offers an outstanding combination of innovative technology, robust construction, and unparalleled flexibility. Its specially developed Tunable Mass System (TMS) allows for individual adjustment of the bass response, enabling it to reach its full potential in any application – whether in compact sealed enclosures or powerful bass-reflex enclosures.

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Maximum Performance for the Deepest Bass

With a recommended power range of 300 to 750 watts RMS, the HELIX IQ W12-DVC2 has a wide range of applications and is particularly optimized for high-performance amplifier configurations. Its robust construction ensures consistently precise reproduction, even at high levels over extended periods. The 3-layer fiberglass-Mylar honeycomb cone combines maximum rigidity with optimal internal damping, minimizing distortion and delivering dynamic, controlled bass reproduction. Outstanding impulse response ensures that even complex bass lines are reproduced clearly and precisely without sacrificing definition.

A highly efficient cooling system with a large pole piece vent and flow-optimized basket design ensures continuous airflow. This prevents overheating and thermal compression effects, allowing the subwoofer to deliver consistently high performance even under sustained load.

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Tuneable Mass System (TMS) – Fine-tuning your sound

With the innovative Tunable Mass System (TMS), the HELIX IQ W12-DVC2 offers a completely new way to customize your sound. By selectively adding or removing weights within the dust cap, the subwoofer's moving mass can be adjusted. This adjustment alters the Thiele/Small parameters, directly influencing the subwoofer's resonant frequency, overall Q factor, and efficiency.

Depending on the chosen configuration, the sound signature changes significantly. Without added weight, the resonant frequency remains in the upper range, resulting in exceptionally fast impulse response and high efficiency. This tuning is ideal for volume-optimized setups and precise bass reproduction with maximum headroom. With increasing mass, the resonant frequency decreases, allowing the subwoofer to reproduce lower frequencies with greater impact. This is particularly advantageous for sealed enclosures or low-tuned bass-reflex designs, as it enables a particularly voluminous and powerful bass response.

The ability to adjust the moving mass allows for precise tuning of the subwoofer to the specific enclosure volume and the vehicle's acoustics. While a higher moving mass allows for a lower cutoff frequency, a lower mass maintains higher efficiency, enabling the subwoofer to operate efficiently even with moderate amplifier power. This unique flexibility makes the HELIX IQ W12-DVC2 a perfect choice for anyone who expects the highest sound precision and maximum adaptability.

Features

Audiophile-grade subwoofer – delivers superior sound quality with impressive bass and precise dynamics

Designed for maximum power handling – up to 750 watts RMS enables even the most demanding system designs

Proprietary Tunable Mass System (TMS) – configurable cone weight for fine-tuning Thiele/Small parameters before and after installation

Powerful deep bass, unique dynamics – 3-layer fiberglass-Mylar honeycomb cone for maximum precision and optimal internal damping

Flexible connection – 2 x 2-ohm dual voice coil for flexible system configurations

Optimized for compact enclosures – high-performance subwoofer designed for space-saving installations

Versatile application – suitable for sealed and bass-reflex enclosures for maximum system design flexibility

Elaborate design – meticulously engineered die-cast aluminum basket with integrated protective grille for maximum durability

Technical Specifications

– +1 TM +2 TM +3 TM

Power Handling RMS / Max. P 750 / 1,500 Watts

Recommended Amplifier Power RMS from 300 Watts

Impedance Z 2 x 2 Ω DC

Resistance Re 2 x 1.9 Ω

Resonance Frequency Fs 36 Hz 32 Hz 29 Hz 27 Hz

Mechanical Q Factor Qms 5.37

Electrical Q Factor Qes 0.53 0.59 0.64 0.69

Total Q Factor Qts 0.48 0.53 0.57 0.62

Compliance Cms 96 μm/N

Equivalent Volume Vas 35 L

Force Factor B*I 18.1 Tm

Sensitivity SPL 90 dB @ 2.83V / 1m

87 dB @ 1W / 1m

Diaphragm area Sd 515 cm²

Moving mass Mms 199 g 252 g 305 g 358 g

Diaphragm material Fiberglass-Mylar-Honeycomb diaphragm

Mechanical resistance Rms 8.5 kg/s

Voice coil diameter ø 63 mm

Voice coil winding width

34 mm

Max. linear diaphragm excursion Xmax +/- 12 mm

Outer diameter ø 327.1 mm

Mounting diameter ø 281 mm

Mounting depth 144.7 mm

Recommended enclosures

Closed enclosure

Net volume 33 L 47 L 65 L 115 L

Lower

cutoff frequency (-3dB) 53 Hz 44 Hz 37 Hz 31 Hz

Bass reflex

enclosure

Net volume 70 L 90 L 110 L 140 L

Reflex

port

diameter ø 100 mm

Reflex

port area 78 cm²

Reflex

port length 27 cm 31 cm 37 cm 39 cm

Tunnel tuning frequency Fb 31 Hz 26 Hz 22 Hz 19 Hz

Lower

cutoff frequency (-3dB) 27 Hz 22 Hz 19 Hz 16 Hz