Ex-Display Helix IK 12W 12" Dual 2 Ohm Car Subwoofer 300W RMS

This ex-display Helix IK 12W is a 12-inch (30cm) non-enclosed passive subwoofer with a dual 2 ohm voice coil, rated at 300W RMS (600W max). Made in Germany, it delivers powerful, accurate bass from a compact design suitable for custom enclosures.

Key Specifications

• Brand: Helix
• Model: IK 12W (IK W12-DVC2)
• Type: Non-Enclosed Passive Subwoofer
• Shape: Round
• Size: 12 inches (30cm)
• Voice Coil: Dual 2 ohm (2 x 2 ohm)
• RMS Power: 300W
• Max Power: 600W
• Impedance: 2 x 2 ohm (DVC)
• Country of Origin: Germany
• Colour: Black
• Membrane Material: Hand-made paper fibre
• Voice Coil Diameter: 50.8mm
• Surround: Long-stroke rubber
• Included: Protective grille, cover ring, magnetic cover with Helix logo

Thiele-Small Parameters

• Resonant Frequency (Fs): 32 Hz
• Total Q (Qts): 0.41
• Equivalent Volume (Vas): 66 L
• DC Resistance (Re): 2 x 1.6 ohm
• Force Factor (B*l): 13.7 Tm
• Efficiency: 93 dB @ 2.83V/m, 90 dB @ 1W/m
• Membrane Area (Sd): 515 cm²
• Moving Mass (Mms): 134 g
• Mechanical Resistance (Rms): 7.33 kg/s
• Voice Coil Diameter: 50.8 mm

Construction and Performance

The hand-made paper cone is extremely torsion-resistant, delivering precise bass response even at high levels. Dual ventilation of the voice coil reduces compression, maintaining power handling. The long-stroke rubber surround and robust magnetic system are built for compact enclosures. The dual 2 ohm voice coil allows flexible wiring: series for 4 ohms, parallel for 1 ohm, or using each coil separately, making it compatible with many amplifiers. The robust print terminals ensure reliable connection.

Why Choose an Ex-Display Item?

This subwoofer was used as a showroom display or end-of-line stock, so it is offered at a reduced price compared to brand-new sealed units. It may have minor cosmetic signs of handling or light surface marks, but it is fully functional and has not been used in an installation. All mechanical and electrical specifications remain as per factory standards. When buying ex-display, inspect for visible marks, but performance is identical to a new unit.

For DIY enthusiasts, the Helix IK 12W works well in sealed or ported enclosures. The included technical data provides recommended net volumes and tuning frequencies. This subwoofer is a high-quality German-built driver at a clearance price.