Sundown Audio Xv4 18" D2 Subwoofer | 3000W RMS

Unleash Ultimate Bass Power with Sundown Audio X Series Professional-Grade Performance

The Sundown Audio XV4 18" D2 Subwoofer | 3000W RMS is built for serious bass systems that need extreme output, deep low-frequency control, and clean performance under pressure. With 3,000 watts RMS, 6,000 watts peak power, professional-grade X v.4 voice coil technology, and a massive 18-inch platform, this X Series subwoofer is made for listeners who want bass that hits hard without falling apart at high volume.

The Sundown Audio XV4 18 is engineered for extreme low-frequency extension and massive air displacement. Its 30mm one-way Xmax allows the cone to move with authority while staying controlled, helping produce the kind of clean, physical bass demanded in SPL competition, demo vehicles, and high-output daily builds.

Why You'll Love It

• Massive Power Handling: Rated at 3,000 Watts RMS and 6,000 Watts Peak power, giving serious systems the output headroom needed for earth-shaking bass.

• Advanced X v.4 Coils: Precision-engineered X v coil platform improves thermal stability, and advanced cooling technology in the XV4 helps prevent overheating during prolonged use.

• 30mm Xmax: Boasts a linear excursion of 30mm one-way Xmax, allowing for massive clean mechanical movement and stronger low-frequency response.

• Versatile Installation Planning: Designed around serious enclosure builds; sealed enclosures are not recommended for the XV4 due to its high-excursion suspension design.

• Competition Ready: Built for extreme-performance, handling deep bass and high-output SPL competition while still offering the control needed for everyday high-quality listening.

An 18-inch subwoofer has approximately 44% more cone area than a 15-inch subwoofer, resulting in 2-4 dB more output at the same power in comparable enclosures. The real advantage of an 18-inch subwoofer is its low-frequency extension, as it moves significantly more air below 30 Hz, which is often felt more than heard in SPL competitions.

What Makes It Different

• Precision-Engineered X v.4 Coils: Enhanced thermal management system helps provide superior heat dissipation, keeping the voice coil more stable when the system is pushed hard.

• Heavy-Duty 9.25" Motor: The large motor structure gives the XV4 the control needed for high-excursion movement, and the quintuple motor structure is designed to maximize motor force factor.

• Optimized Cone Area (SD 113.41): The large cone area of 113.41 square inches allows the XV4 to efficiently produce significant acoustic output with minimal effort.

• Dual Voice Coil Options: Voice coil configurations for the XV4 are available in Dual 1-Ohm or Dual 2-Ohm options, giving installers flexibility when matching amplifiers and final impedance.

Compared with previous and related Sundown models, the enclosure requirements show how serious this platform is. The Sundown X-18 v.3 requires 5.0 to 6.0 cubic feet net for a ported enclosure tuned to 28-32 Hz. For the NS-18 v.5 (Nightshade), the recommended enclosure size is between 6.0 to 8.0 cubic feet. The XV4 18 D2 sits in that serious-output category, and wall-mounted builds are common for 18-inch competition setups due to the large enclosure sizes required.

How It Works

1. Choose Your Enclosure
   Build the XV4 around the right airspace and tuning. For this model, a ported enclosure around 7.00 cu ft with 112 sq in of port area and 32 Hz tuning is the recommended path for maximum output. Sealed enclosures are not recommended for the XV4 due to its high-excursion suspension design.

2. Connect and Configure
   Wire the Dual 2-Ohm coils to match an amplifier that can deliver real continuous power. The D2 configuration can be wired for system optimization, while dual 1 and dual 2 options give builders flexibility across different amplifier setups.

3. Experience the Power
   Once properly powered and tuned, the XV4 delivers deep, controlled, distortion-resistant bass. The frequency response of the XV4 remains flat and consistent while playing low volumes or pushing the driver to its limits, giving you true real world performance rather than inflated numbers.

The XV4 18 is not a small-system upgrade. It is for builds where the amplifier, electrical system, enclosure, and vehicle space are all planned together to reflect true real world performance.

Technical Specifications

• Product: Sundown Audio XV4 18" D2 Subwoofer

• Series: X Series

• RMS Power: 3000W

• Peak Power: 6000W

• Voice Coil Configuration: Dual 2-Ohm

• Available Voice Coil Options: Dual 1-Ohm or Dual 2-Ohm

• Xmax: 30mm one-way

• Motor Diameter: 9.25"

• Cone Area: 113.41 sq in

• Sensitivity: 87 dB @ 1w/1m

• Mounting Depth: 15"

• Cutout Diameter: 16.69"

• Displacement: 0.28 cu ft

Dual-2-Ohm T/S Specs

Sundown Audio Subwoofer Measurements

Ported Enclosure Specs

4th Order Enclosure Specs

X Series Power Ratings

Sundown Audio has led the industry in quality and performance, and to improve accuracy and transparency, some listings may note that Sundown Audio has updated our subwoofer power ratings to reflect true real world performance. During the transition some packaging may show previous ratings. Any notice on packaging for subwoofers should be compared with current published specifications, and performance fully aligns with our current Sundown Audio guidance. If you have questions about authenticity or ratings please contact directly for confirmation.

Who It's For

Ideal for:

• SPL competition enthusiasts seeking maximum low-frequency output

• Car audio professionals building high-end custom systems

• Serious bass enthusiasts who demand clean, powerful sound

• Demo vehicle owners who want bass that can be felt outside the vehicle

• Builders upgrading from smaller subwoofers to professional-grade 18-inch performance

If you want a subwoofer that can move serious air below 30 Hz, handle 3000W RMS power, and deliver the kind of output that makes an 18-inch platform worth the space, the Sundown Audio XV4 18" D2 fits your build. It is especially well suited for ported and 4th order designs where the enclosure, power, and tuning are designed around the driver instead of forcing the driver into a box that is too small.

Explore More X Series Sundown Audio XV4 Subwoofers

Expand your bass experience with other powerful options in the Sundown Audio XV4 lineup. Whether you prefer different sizes or voice coil configurations, Amped Up Car Audio offers a variety of XV4 subwoofers to fit your build perfectly:

• Sundown XV4 18" D1 Subwoofer – Single 1-Ohm coil option for specialized wiring and power setups.

• Sundown XV4 15" D2 Subwoofer – A slightly smaller 15-inch model with Dual 2-Ohm coils, balancing output and enclosure size.

• Sundown XV4 15" D1 Subwoofer – 15-inch with a single 1-Ohm coil, ideal for custom impedance matching.

• Sundown XV4 12" D2 Subwoofer – Compact 12-inch subwoofer with Dual 2-Ohm coils, perfect for tighter spaces without sacrificing power.

• Sundown XV4 12" D1 Subwoofer – 12-inch single 1-Ohm coil option for flexible system configurations.

• Sundown XV4 10" D2 Subwoofer – Smaller 10-inch dual 2-Ohm coil subwoofer for high-performance systems with limited space.

• Sundown XV4 10" D1 Subwoofer – 10-inch single 1-Ohm coil, great for precision tuning in compact enclosures.

Browse these options to find the ideal Sundown XV4 subwoofer that matches your power goals, enclosure preferences, and system design.

Why Choose Sundown Audio at Amped Up Car Audio

Choose Amped Up Car Audio when you want more than a checkout page. We help customers match the Sundown Audio XV4 18" D2 with the right amplifier, enclosure, wiring, and electrical support so the system performs the way a 3000W RMS subwoofer should.

Our team understands high-output car audio, SPL competition setups, and real-world daily builds. As a online retailer in Conover, NC, Amped Up Car Audio offers hands-on installation knowledge, personalized support, competitive pricing on premium brands, fast secure shipping, and reliable warranty help. Contact Amped Up Car Audio so we can confirm the right product, current rating, and best setup path before you buy.

Frequently Asked Questions

What enclosure size do I need for the XV4 18"?
For the XV4 18, the recommended ported enclosure is 7.00 cu ft with 112 sq in of port area tuned to 32 Hz. A 4th order design may use a 3.0 cu ft sealed side, 9.0 cu ft ported side, 180 sq in of port area, and 8" port length.

Are sealed enclosures recommended for the XV4 18?
No. Sealed enclosures are not recommended for the XV4 due to its high-excursion suspension design. A properly designed ported or 4th order enclosure is the better choice for low frequency output, cooling, and full performance.

Can this handle daily use or just competition?
Yes, the XV4 can be used in a daily system when installed correctly. Advanced cooling technology in the XV4 helps prevent overheating during prolonged use, and the enhanced thermal management system provides superior heat dissipation for long sessions.

What amplifier power do I need?
Use an amplifier capable of delivering clean power near the subwoofer’s rating at the final wired impedance. The XV4 18 subwoofer is rated at 3,000 Watts RMS and 6,000 Watts Peak power, so amplifier choice, electrical upgrades, fusing, grounding, and enclosure design all matter.

How does the D2 version wire compared with other options?
The D2 version uses Dual 2-Ohm voice coils. The voice coil configurations for the XV4 are available in Dual 1-Ohm or Dual 2-Ohm options, so choose the version that best matches your amplifier’s stable impedance and power output.

How does it compare to the previous XV3 series?
The Sundown X-18 v.3 requires 5.0 to 6.0 cubic feet net for a ported enclosure tuned to 28-32 Hz. The XV4 continues the X Series focus on high excursion, deep bass, and extreme output while adding the X v.4 platform, improved cooling, and stronger thermal control.

Is professional installation recommended?
Yes. This is a high-power 18-inch subwoofer with a large motor, deep mounting depth, and serious enclosure requirements. Professional installation helps protect the subwoofer, amplifier, vehicle electrical system, and overall sound quality.

Ready to Upgrade Your Bass Game?

Stop settling for weak bass, limited cone area, and distorted output at high volume. Choose the Sundown Audio XV4 18" D2 Subwoofer | 3000W RMS when you want extreme low-frequency authority, 30mm Xmax, a heavy-duty 9.25" motor, and the kind of output built for serious SPL competition and daily high-performance listening.

Order from Amped Up Car Audio for secure checkout, fast shipping, expert support, and a team that understands how to make this subwoofer perform at its full potential.

Secure checkout. Fast shipping. Expert support. Satisfaction guaranteed.