Sundown SD-Series v.4 12″ Neo D4 Subwoofer
600 W RMS shallow neo 12-inch dual 4-ohm subwoofer
$239.99$319.99 (-25%)
Overview
The Sundown SD-Series v.4 12-inch Neo D4 is rated 600 W RMS / 1200 W peak on dual 4-ohm voice coils with 14.5 mm Xmax. A lightweight neodymium motor, 2-inch 8-layer copper voice coil, cast aluminum frame, and Faraday ring target sound quality in small sealed boxes. Mounting depth is about 4.9 inches; sealed volume about 0.8–1.0 cu ft.
Product details
Neo shallow platform
Rated 600 W RMS / 1200 W peak. The neodymium motor keeps weight down while the 2-inch 8-layer copper coil and Faraday ring support clean output.

Sealed-first design
Optimized for small sealed enclosures (about 0.8–1.0 cu ft). Ported is not recommended on the manufacturer page for this model.

Fitment
Overall diameter about 12.50″, cutout about 10.50″, mounting depth about 4.9″, displacement about 0.10 cu ft.
Key features
- 12-inch SD-Series v.4 Neo subwoofer
- 600 W RMS / 1200 W peak
- Dual 4-ohm voice coils (D4)
- 14.5 mm Xmax
- Lightweight neodymium motor
- 2" 8-layer copper voice coil
- Cast aluminum frame
- Large aluminum Faraday ring
- Mounting depth about 4.9"
Specifications
| Brand | Sundown |
|---|---|
| Model | SD-4 12 D4 |
| SKU | SD4D412 |
| Product type | Shallow neo subwoofer |
| Size | 12 inch |
| Voice coils | Dual 4 ohm |
| RMS power | 600 W |
| Peak power | 1200 W |
| Xmax | 14.5 mm |
| Motor | Neodymium |
| Mounting depth | 4.9" |
| Sealed volume | 0.8–1.0 cu ft |
| Size | 12 inch |
Important notes
- Requires a compatible amplifier and sealed enclosure (sold separately)
- Ported enclosures not recommended for this model
- Professional installation recommended
What's in the box
- Sundown SD-4 12" Neo D4 subwoofer
- Mounting hardware as packaged



