Description
Sundown Audio SD-2 12 D4
The Sundown Audio SD-2 12 D4 is a 12-inch subwoofer built for high-output, precise bass in a variety of car audio setups. The dual 4-ohm voice coil (D4) allows flexible wiring to 2 Ω or 8 Ω, making it compatible with a wide range of amplifiers. Engineered with a vented magnetic gap, vented pole piece, high-temperature copper voice coil, stitched “Mini-XL” tinsel leads, and reinforced suspension, the SD-2 12 D4 delivers powerful low-end output with excellent reliability and thermal handling. It performs well in sealed or ported enclosures and is ideal for under-seat, behind-seat, or custom stealth installations where space is limited but strong bass is required.
Specifications
| T/S SPECS | SLD 12″ D2 | SLD 12″ D4 |
| RE (Ohms) | 3.65 | 6.85 |
| FS (Hz) | 42.959 | 45.142 |
| VAS (L) | 26.889 | 29.481 |
| Qes | 0.691 | 0.619 |
| Qms | 2.227 | 2.298 |
| Qts | 0.415 | 0.487 |
| Le (mH) | ||
| BL (NA) | 19.868 | 23.025 |
| Mms (Grams) | 204.319 | 168.773 |
| Cms (uM/N) | 67.177 | 73.652 |
| Sens (dB @ 1w/1m) | 88.1 | 88.3 |
| Xmax | 12mm | 12mm |
Enclosure Specifications
| ealed Enclosure | 1.0 cu ft |
| Ported Enclosure | 1.5 cu ft |
| Recommended Tuning | 35Hz |
| Recommended Port Area | 26 sq in |
| Displacement | |
| Depth | 5.45″ |
| Outside Diameter | 12.625″ |
| Cut-Out | 11.125″ |
About The Product
Sundown’s SLD slim subwoofers deliver incredibly high volume through several important upgrades. These include pole-piece channels to reduce air noise and improve cooling, top-plate “slits” for better cooling and less distortion and a magnet shorting ring. Sundown has also secured the spider, motor, and aluminum pole cap with bolts, and added “mini-XL” lead wires for years of reliable service.
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