Description
Sundown Audio SA-18 v.2 D2
The Sundown Audio SA-18 v.2 D2 is an 18-inch shallow-mount subwoofer from the SA Series v.2 lineup, engineered to deliver powerful, deep bass in space-constrained installations. It features a dual 2-ohm (D2) voice coil, allowing flexible wiring to suit a variety of amplifier setups. Constructed with a high-temperature copper voice coil, reinforced cone, and durable foam surround, the SA-18 v.2 D2 provides tight, controlled low-frequency performance and long-term reliability. Optimized for sealed enclosures, this subwoofer is perfect for trucks, vans, and compact vehicles where strong, punchy, and accurate bass is required in a shallow-mount design.
Specifications
| T/S SPECS | SAV2 18″ D2 | SAV2 18″ D4 |
|---|---|---|
| RE (Ohms) | 3.97 | 6.06 |
| FS (Hz) | 29.051 | 31.868 |
| VAS (L) | 114.234 | 106.964 |
| Qes | 0.424 | 0.458 |
| Qms | 3.052 | 2.853 |
| Qts | 0.372 | 0.395 |
| Le (mH) | 3.6326 | 4.7903 |
| BL (NA) | 32.523 | 38.159 |
| Mms (Grams) | 619.174 | 549.519 |
| Cms (uM/N) | 48.474 | 45.389 |
| Sens (dB @ 1w/1m) | 90.1 | 90.7 |
| Xmax | 19mm | 19mm |
Enclosure Specifications
| Sealed Enclosure | 3.5 cu ft |
| Ported Enclosure | 4.5 cu ft |
| Recommended Tuning | 35Hz |
| Recommended Port Area | 64 sq in |
| Displacement | 0.2 cu ft |
| Depth | 10.125″ |
| Outside Diameter | 18.62″ |
| Cut-Out | 16.69″ |
About The Product
This SA-10/12/15 v.2 series is a top-down upgrade from the original SA series. The 2.75” coil punches way above its weight, outperforming many 3” coils without the adding weight & with the added advantage of a wider spider. We are able to perfectly balance the mass, motor force, and suspension stiffness for the intended power level.
The motor also features a large magnet shorting ring (faraday ring) to reduce distortion and deliver smoother response across the entire acoustic spectrum. The motor & coil setup is mated to an extremely robust multi-layer spider with fully tied-on & doubled-up “XL” tinsel leads. A competition-grade paper cone, strong foam surround, and cast aluminum frame are used to complete this masterpiece. On top of the ~19mm of one-way linear excursion we have an x-mech limit of 37mm one-way before coil bottom making it nearly “bottomless.”
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