Sundown Audio U-Series v.2 18" Subwoofer

RMS 1750 watts Dual 2 or 4 ohm voice coils Optimized for small ported or bandpass enclosures Aluminum 3” voice coil former for superior heat dissipation High-temperature copper voice coil Double stitched surround Heavy-duty cast basket Spring-loaded terminals accept up to 8-gauge wire Stitched-on heavy-duty tinsel leads Solid pole with vent channels and aluminum shorting ring cap Rear gap-venting Top-Plate Cooling Channels Designed to be at home in the competition lanes or playing your favorite music, the U Series is the premier “standard suspension” woofer in the Sundown lineup. A double-stacked 9.4-inch wide ferrite magnet system is coupled to a thick top plate. A thick set of shorting rings are used inside the magnets and on the pole cap, smoothing out frequency response while doubling as a heat sink and airflow guide. A custom aluminum frame was designed specifically for the U Series. It’s substantially thicker and equipped with heat dissipation ribs at the bottom of the frame. The U v.2 motor also features an extended pole piece to keep the coil under perfect control under high stress. The coil temperature is controlled with machined, high-velocity pole channels and a series of 16 direct air-gap vents in the back plate. Specifications RE (Ohms) 3.8710 6.0767 FS (Hz) 30.9541 30.9212 VAS (L) 111.7625 114.6901 Qes 0.5669 0.6572 Qms 5.6396 5.5116 Qts 0.5151 0.5872 Le (mH) 3.3981 4.7475 BL (NA) 27.4023 31.4938 Mms (Grams) 565.4130 552.1551 Cms (uM/N) 46.7560 47.9807 Sens (dB @ 1w/1m) 89.4169 88.8733 Xmax 30mm 30mm T/S SPECS UV.2 18" D2 UV.2 18" D4 Enclosure Specifications Sealed Enclosure 3.0 cu ft Ported Enclosure 4.0 cu ft Recommended Tuning 35Hz Recommended Port Area 64 sq in Displacement 0.26 cu ft Depth 10″ Outside Diameter 18.63″ Cut-Out 16.9″ Physical Dimensions Download Dimensions