Sundown Audio SA-15 V.3 D2 15" 1500w RMS Car Subwoofer DVC 2-Ohm SA Series Sub

The SA-15 V.3 D2 is a 15-inch car subwoofer rated at 1500W RMS and 3000W peak, with dual 2-ohm voice coils. It is built for daily high-output bass, with 22mm of one-way linear excursion and a 40mm mechanical limit so the cone has travel left over when a track hits hard. Sensitivity measures 87.3 dB, so it turns amplifier watts into usable output rather than heat.

A 35 Hz free-air resonance and 44 L Vas make this sub workable in several box types. Sundown recommends 1.5 cu ft sealed for tight, accurate bass, or 3.0 cu ft ported tuned to 35 Hz with 44 sq in of port area when you want more output on the bottom end. For a bandpass build, use a 1.5 cu ft sealed side and a 4.5 cu ft ported side with 90 sq in of port area and a 6-inch port length. Factor in 0.22 cu ft of cone displacement when calculating net volume.

Mounting numbers are practical for real vehicles: 9 inches of depth, a 15.6-inch outside diameter, and a 14.1-inch cutout. That fits trunk boxes, hatchback enclosures, and truck-cab walls where depth is limited.

The dual 2-ohm setup pairs directly with a monoblock rated near 1500W at 1 ohm, so one sub and one amplifier make a complete bass system. Wire the coils in series instead for a 4-ohm load, or add a second sub later and keep the same amplifier happy.