The Sundown Audio SML-12 D4 12" Shallow Subwoofer is a dual 4-Ohm DVC configuration delivering 600W RMS and 1200W Peak per sub, totaling 1200W RMS / 2400W Peak for the pair. This shallow design allows installation under or behind vehicle seats while maintaining excursion and low-frequency output.

Each subwoofer features a 2.5" black aluminum voice coil former with high-temperature 4-layer copper wire, stitched Mini-XL tinsel leads, vented pole piece, and multi-vented magnetic gap. Dual-magnet motor design and bolt-through construction ensure consistent performance and mechanical reliability.

Electrical specifications include RE 6.85 Ohms, FS 39.905 Hz, Sensitivity 86.7 dB @ 1W/1m, Xmax 11mm, BL 22.801 N/A, Mms 186.887 g, Cms 85.771 uM/N, Qts 0.513, Qms 3.035, Qes 0.617. Subwoofer dimensions are depth 4.45", cutout 10.75", motor diameter 6.14", displacement 0.05 cu ft.

Optimized for ported enclosures (1.25–1.75 cu ft, 26–30 sq in port, tuned to 35Hz), sealed (0.75–1.0 cu ft), or 4th order band-pass enclosures (0.75 cu ft sealed / 2.25 cu ft ported, 15 sq in port, 6" port length). This design provides controlled low-frequency response in tight spaces without compromising excursion or thermal management.