Sundown Audio U-15 D4 15 1500W RMS Dual 4-Ohm Subwoofer

The Sundown Audio U-15 is a powerful 15-inch subwoofer that boasts a RMS power rating of 1500 watts. With its impressive specifications, this subwoofer is designed to deliver exceptional low-frequency performance.

Regarding the technical details, the U-15 has a DC resistance (Re) of 6.1 ohms and a resonance frequency (Fs) of 34.9 Hz. The equivalent volume (Vas) is 63.9 liters, and the electrical Q factor (Qes) is 0.39. The mechanical Q factor (Qms) is 3.48, resulting in a total Q factor (Qts) of 0.35. The voice coil inductance (Le) is 3.80 mH, and the force factor (BL) is 34.6 NA.

The moving mass (including the air load) (Mms) is 353.0 grams, and the suspension compliance (Cms) is 0.06 mm/N. The sensitivity of the U-15 is an impressive 90.2 dB at 1 watt and 1 meter.

When it comes to the physical dimensions, the U-15 has a mounting depth of 9.05 inches, a cutout diameter of 14.01 inches, and an outside diameter of 15.59 inches. The displacement of the subwoofer is 0.24 cubic feet.

For optimal performance, Sundown Audio recommends a sealed enclosure of 2.0 cubic feet or a ported enclosure of 3.0 cubic feet. The recommended tuning frequency is 32 Hz, and the recommended port area is 48 square inches.

The Sundown Audio U-15 is a high-quality subwoofer designed to deliver powerful and accurate low-frequency performance. Its impressive specifications and robust construction make it a popular choice among audio enthusiasts and professionals alike.

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