Ruthless Audio 18" Neo 4"VC Subwoofer

Ruthless Audio 18" Neo 4"VC Subwoofer

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The Ruthless Audio 18" Neo 4"VC Subwoofer is a 18-inch Ruthless Audio Ultra Series neo subwoofer rated for 4,500 watts RMS. It is offered in dual 0.7-ohm and dual 1.7-ohm voice-coil configurations for experienced builders matching a high-output subwoofer system to the amplifier and final load.

The design uses a 4-inch, 4-layer voice coil and a staged cooling and inductance-control system. This is a serious subwoofer that should be selected around the enclosure, amplifier output, final impedance, speaker wire, and electrical system—not RMS power alone.

Ruthless Audio 18" Neo 4"VC Subwoofer Specifications

• Product series: Ruthless Audio Ultra Series Neo subwoofer
• Size: 18 inches
• RMS power handling: 4,500 watts
• Voice-coil options: Dual 0.7 ohm or dual 1.7 ohm
• Voice coil: 4-inch-diameter, 4-layer voice coil
• Motor design: Open-column, FEA-optimized neo motor with high flux density
• Cooling system: Machined aluminum pole sleeve, aluminum domed compression cap, and finned aluminum extrusion for staged cooling and inductance control
• Cone: Kraft-pulp fiber-reinforced cone
• Surround: Dual-layer wide foam surround
• Suspension: Five-layer progressive soft spider pack
• Basket and gasket: Heavy-duty aluminum basket with wrap-around gasket

Choose the Voice-Coil Option Before Ordering

Both available versions are dual-voice-coil subwoofers. Select dual 0.7 ohm or dual 1.7 ohm based on the number of subwoofers, the wiring configuration, the target final load, and the amplifier's stable and warrantied impedance.

Enclosure and Electrical Planning

Do not choose an enclosure only by diameter. The box must match the subwoofer's required airspace, mounting depth, displacement, and the intended sealed or ported design. The amplifier powering a subwoofer at this level may also require upgraded power wire, fusing, grounds, battery reserve, Big 3 wiring, and alternator support.

Match the Ruthless Subwoofer to the Complete Bass System

This 18-inch subwoofer must be matched to the amplifier's RMS output at the final wired impedance, the correct enclosure, adequate speaker wire, and enough electrical support for the amplifier. Confirm the selected dual-voice-coil option before ordering because the coil impedance changes the final load.

Shop Ruthless Audio Subwoofers and Enclosures

Browse the full Ruthless Audio collection, compare more car audio subwoofers, shop 18-inch subwoofers, or find a suitable option in the subwoofer boxes and enclosures collection.

Helpful Subwoofer and Enclosure Guides

Learn how the specifications work in the subwoofer specifications guide, calculate the final impedance with the subwoofer wiring and ohm-load guide, and choose an enclosure with the car audio subwoofer box guide.

The complete car audio bass setup guide covers the subwoofer, amplifier, box, wiring, and electrical system. For high-output enclosures, the box-rise guide explains why the real operating load may differ from the nominal wired load.

Frequently Asked Questions

Is this listing for the 18-inch version?

Yes. The product title and description identify this listing as the 18-inch version.

Which voice-coil option should I order?

Choose the option that creates a safe final impedance for the amplifier and the number of subwoofers in the system. Calculate the full wiring plan before ordering.

Can I use any 18-inch box?

No. Match the enclosure to the exact subwoofer requirements and measure the available vehicle space before ordering or building a box.

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