X-Series v.3 18" Subwoofer
Notice On Packaging For Subwoofers
Sundown Audio has led the industry in quality and performance for over a decade. To improve accuracy and transparency, we have updated our subwoofer power ratings to reflect true real-world performance.
During this transition, some packaging may show previous ratings. Performance fully aligns with our current published specifications. If you have any questions about authenticity or ratings, please contact directly for confirmation.
- 2500 Watts RMS / 5000 Watts Peak
- Dual 1 or 2 ohm voice coil
- Made for extremely deep bass
- Triple-stacked magnet
- 3” voice coil
- Hyper-extended pole
- Built to order
Designed with an extended pole piece and an incredible four inches of peak-to-peak excursion, the X v.3 is engineered for ultra-deep bass and high power handling. Engineered to set a new standard in the low-frequency/small-ported-box subwoofer category, the X Series can also work in up to a 50% larger enclosure if you desire even more low-end extension.
The X v.3 series differentiates itself with its incredibly linear suspension, ensuring the lowest level of bass extension in a small enclosure while maintaining extremely low levels of distortion. Notably, the v.3 series features a much larger motor structure (220mm vs. 190mm on the v.1 series), improved motor ventilation, and an all-new Mega-Roll v.2 surround, providing a more linear and rugged update to the world-famous Mega-Roll v.1 surround design.
| Parameter | D1 Model | D2 Model |
|---|---|---|
| Re | - | - |
| Fs | - | - |
| Qms | - | - |
| Qes | - | - |
| Qts | - | - |
| Vas | - | - |
| Mms | - | - |
| Cms | - | - |
| BL | - | - |
| Sd | 1641.9 cm² | 1641.9 cm² |
| Xmax | 30mm | 30mm |
| SPL (1W/1m) | - | - |
| Specification | X18-v3 D1/D2 |
|---|---|
| Overall Diameter | 18.42" |
| Cutout Diameter | 16.69" |
| Motor Diameter | 8.66" |
| Mounting Depth | 10.25" |
| Displacement | 0.28 Cu. Ft. |
| Sealed Volume | Not Recommended |
| Ported Volume | 7.0 cu ft |
| Port Tuning | 32 Hz |
| Port Area | 112 sq in |
| 4th Order Sealed | 3.0 cu ft |
| 4th Order Ported | 9.0 cu ft |
| 4th Order Port Area | 180 sq in |
| 4th Order Port Length | 8" |
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