Sundown Audio X Series XV4 18" 3000W RMS Subwoofer
Sundown Audio X Series XV4 18" 3000W RMS Subwoofer is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
We ship our products anywhere in the world and provide FREE shipping on all orders in the continental (48) States
The Sundown Xv4 18″ Subwoofer delivers unmatched power and control for serious bass enthusiasts. Built with high-grade X v.4 coils, this subwoofer is designed to handle up to 3000W RMS and 6000W peak power, ensuring maximum output without distortion.
Its optimized design enhances air movement and cooling, providing long-lasting performance even under heavy use. The advanced motor structure and large cone area (SD 113.41) create powerful low-frequency response and clean sound reproduction.
Perfect for sealed or ported enclosures, the Xv4 18″ gives you flexibility in setup and tuning — whether for SPL competition or everyday high-quality listening.
Durable, reliable, and beautifully crafted, this subwoofer is the next-level upgrade your sound system deserves.
Key Features
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18″ Xv4 Series Subwoofer
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3000W RMS / 6000W Peak Power
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Dual 1-Ohm or Dual 2-Ohm Voice Coil Options
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Precision-engineered X v.4 Coils for stability
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Heavy-duty motor with 9.25″ diameter
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Deep bass response with 30 mm Xmax
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Sealed or ported enclosure compatibility
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Recommended Port Tuning: 32 Hz
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Built for extreme durability and clean sound
Technical Specifications
| Specification | Value |
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| RMS Power | 3000 W |
| Peak Power | 6000 W |
| Displacement | 0.28 cu ft |
| Mounting Depth | 15″ |
| Outside Diameter | 18.42″ |
| Cutout Diameter | 16.69″ |
| Motor Diameter | 9.25″ |
| Sealed Enclosure | Not Recommended |
| Ported Enclosure | 7.00 cu ft |
| Recommended Port Tuning | 32 Hz |
| Recommended Port Area | 112 sq in |
| 4th Order Sealed Side | 3.0 cu ft |
| 4th Order Ported Side | 9.0 cu ft |
| 4th Order Port Area | 180 sq in |
| 4th Order Port Length | 8″ |
| Xmax | 30 mm |
| SD (Cone Area) | 113.41 |
| RE (Ohms) | 2.05 / 3.74 |
| FS (Hz) | 25.87 / 25.58 |
| VAS (L) | 93.67 |
| Qes | 0.63 / 0.55 |
| Qms | 4.13 / 4.03 |
| Qts | 0.54 / 0.84 |
| BL (NA) | 19.74 / 26.8 |
| Mms | 737.81 / 656.74 |
| Sensitivity | 86 / 87 dB |
| T/S Specs | |
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RMS Power (D2)
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RMS Power (D1)
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Peak Power (D1)
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Peak Power (D2)
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RE D1 (Ohms)
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RE D2 (Ohms)
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FS D1 (Hz)
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FS D2 (Hz)
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VAS D1 (L)
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VAS D2 (L)
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Qes D1
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Qes D2
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Qms D1
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Qms D2
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Qts D1
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Qts D2
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BL D1 (NA)
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BL D2 (NA)
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Mms D1 (Grams)
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Mms D2 (Grams)
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Cms D1 (uM/N)
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Cms D2 (uM/N)
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Sens D1 (dB @ 1w/1m)
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Sens D2 (dB @ 1w/1m)
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Xmax D1
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Xmax D2
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| Subwoofer Measurements | |
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Displacement (Inches)
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Depth (Inches)
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Cutout (Inches)
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Motor Diameter (Inches)
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| Ported Enclosure Specs | |
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Ported Enclosure Size
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Recommended Port Area
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Recommended Port Tuning
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| 4th Order Enclosure Specs | |
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4th Order Sealed Side
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4th Order Ported Side
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4th Order Port Area
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4th Order Port Length
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Sundown Audio X Series XV4 18" 3000W RMS Subwoofer
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