Sundown SLD-12 D4 Shallow-Mount Subwoofer
600 W RMS shallow 12-inch dual 4-ohm subwoofer
$219.99$259.99 (-15%)
Overview
The Sundown SLD-12 D4 is a shallow-mount 12-inch subwoofer rated 600 watts RMS and 1200 watts peak on dual 4-ohm voice coils. A black aluminum 2.5-inch voice coil, high-temperature 4-layer copper wire, vented magnetic gap, dual-magnet motor, and bolt-through construction target high output in limited depth. Official mounting depth is 5.45 inches, with a 12.625-inch overall diameter and an 11.125-inch cutout. A compatible amplifier and enclosure are sold separately. Professional installation is recommended.
Product details
Shallow 12-inch platform
The SLD-12 is the 12-inch model in Sundown’s SLD slim subwoofer line. This listing is the D4 version, with dual 4-ohm voice coils. Official published power is 600 watts RMS and 1200 watts peak, with 12 mm Xmax. During a ratings update, some packaging may still show an earlier power figure; performance follows the current published specifications on the manufacturer page.
Motor, coil, and leads
A black aluminum 2.5-inch voice coil with high-temperature 4-layer copper wire is used for heat dissipation. Official features include a solid pole-piece with channels, top-plate slits, a magnet shorting ring, and a multi-vent magnetic gap. Bolt-through motor hardware secures the spider, motor, and aluminum pole cap, and stitched Mini-XL tinsel leads are specified to reduce fatigue.
Mounting dimensions
Official enclosure specs shared by the D2 and D4 versions list an overall diameter of 12.625 inches, a cutout diameter of 11.125 inches, a motor diameter of 7.4 inches, a mounting depth of 5.45 inches, and 0.07 cubic feet of displacement. Leave clearance for cone excursion even in a shallow install.
Enclosure guidance
Official sealed volume is 1 cubic foot. Official ported volume is 1.5 cubic feet with a 35 Hz port tuning and 20 square inches of port area. Fourth-order sealed and ported figures are also published at 0.75 cubic feet sealed and 2.25 cubic feet ported, with 45 square inches of port area and a 6-inch port length. The amplifier and enclosure are sold separately.
Key features
- 12-inch shallow-mount subwoofer with dual 4-ohm voice coils
- 600 watts RMS and 1200 watts peak official power ratings
- 12 mm Xmax on the official SLD-12 D4 Thiele/Small table
- Black aluminum 2.5-inch voice coil with 4-layer copper wire
- Vented pole-piece channels, top-plate slits, and a magnet shorting ring
- Bolt-through motor with stitched Mini-XL tinsel leads
- Official mounting depth of 5.45 inches and 12.625-inch overall diameter
- Official sealed volume of 1 cubic foot; ported 1.5 cubic feet at 35 Hz
Specifications
| Weight | 29 lbs |
|---|---|
| Brand | Sundown |
| Model | SLD-12 D4 |
| SKU | SWSLD12D4 |
| UPC | 810111131001 |
| Product type | Shallow subwoofer |
| Size | 12 inch |
| Voice coils | Dual 4 ohm |
| RMS power | 600 W |
| Peak power | 1200 W |
| Voice coil | 2.5" aluminum former |
| Tinsel leads | Mini-XL stitched |
| Xmax | 12 mm |
| Mounting depth | 5.45" |
| Size | 12 inch |
Important notes
- Requires a compatible amplifier and enclosure (sold separately).
- Wire the dual 4-ohm voice coils for the intended final load.
- Shallow mounting depth still needs clearance for cone excursion.
- Some packaging may show a previous power rating; use the current official 600 W RMS / 1200 W peak figures.
- Professional installation is recommended.
What's in the box
- Sundown SLD-12 D4 shallow-mount subwoofer
