Description
Sundown Audio SA-15 v.2 D4
The Sundown Audio SA-15 v.2 D4 is a 15-inch shallow-mount subwoofer from the SA Series v.2 lineup, designed to deliver high-output, accurate bass in installations with limited depth. Featuring a dual 4-ohm (D4) voice coil, it offers flexible wiring options to suit a variety of amplifier setups. Built with a high-temperature copper voice coil, reinforced cone, and durable foam surround, the SA-15 v.2 D4 ensures clean, controlled low-frequency performance and long-term reliability. Optimized for sealed enclosures, this subwoofer is ideal for trucks, vans, and compact vehicles where space is limited but deep, punchy, and accurate bass is required.
Specifications
| T/S SPECS | SAV2 15″ D2 | SAV2 15″ D4 |
|---|---|---|
| RE (Ohms) | 3.89 | 5.83 |
| FS (Hz) | 36.8387 | 37.4160 |
| VAS (L) | 51.9387 | 45.3391 |
| Qes | 0.5847 | 0.6963 |
| Qms | 5.1005 | 5.7094 |
| Qts | 0.5245 | 0.6206 |
| Le (mH) | 3.6326 | 4.7903 |
| BL (NA) | 24.4656 | 29.1578 |
| Mms (Grams) | 388.9706 | 431.9464 |
| Cms (uM/N) | 47.9860 | 41.8886 |
| Sens (dB @ 1w/1m) | 88.22 | 87.08 |
| Xmax | 19mm | 19mm |
Enclosure Specifications
| Sealed Enclosure | 2.0 cu ft |
| Ported Enclosure | 3.0 cu ft |
| Recommended Tuning | 35Hz |
| Recommended Port Area | 44 sq in |
| Displacement | |
| Depth | 8.65″ |
| Outside Diameter | 15.59″ |
| Cut-Out | 14.01″ |
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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