SDDN 18" Limited Edition Competition 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.
- 3,500 watts RMS
- Available in 10 through 18-inch versions
- Dual 1 ohm coils
- Mega V2 Cone
- Aluminum 3.3” x 80mm coil
- Dual 8 AWG terminals with dual-layer tinsel leads
- Custom cross-cut pole piece with Neodymium cap for increased output and thermal control
- 5-layer spider
- 1,336 oz (83.5 lbs) magnet with integrated thermal ventilation
- Optimized for Ported & 6th order enclosures
- Carbon cone upgrade available
Designed in-house by Sundown Founder Jacob Fuller, the 3,500-watt RMS SDDN is available in 10, 12, 15, and 18-inch models. Each unit boasts a massive 83-pound motor with integrated thermal ventilation, featuring a custom cross-cut pole piece with a Neodymium cap for increased output and thermal control. Sundown’s signature Mega V2 cone is paired with a five-layer spider, a 3.3” x 80mm aluminum voice coil (dual 1-ohm), and dual tinsel leads per eight-gauge terminal.
| Specification | SDDN-18 D1 |
|---|---|
| Fs | 30.04 Hz |
| Re | 2.03 Ω |
| Qms | 5.1500 |
| Qes | 0.3300 |
| Qts | 0.3100 |
| Mms | 717.02 g |
| Cms | 39.14 µm/N |
| Sd | 1641.9 cm² |
| Vas | 72.28 L |
| Sensitivity | 95.37 dB |
| BL | 28.680 T·m |
| Le | 4.23 mH |
| X-Max | 35 mm |
| RMS Power | 3500 W |
| Peak Power | 7000 W |
| Specification | SDDN-18 D1 |
|---|---|
| Overall Diameter | 18.47" |
| Cutout Diameter | 16.7" |
| Motor Diameter | 9.84" |
| Mounting Depth | 15.12" |
| Displacement | 0.33 Cu. Ft. |
| Sealed Volume | Not Recommended |
| Ported Volume | 7.0 cu ft |
| Port Tuning | 32 Hz |
| Port Area | 112 sq in |
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