Description: 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, substantially thicker aluminum frame was designed specifically for the U Series, equipped with heat dissipation ribs. 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 kept in check via a high-velocity solid pole / machined pole channels arrangement and a series of 16 direct air-gap vents in the back plate. Features: 2000 Watts RMS / 4000 Watts Peak Dual 2 ohm 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 Specifications: RE (Ohms): 3.8 FS (Hz): 42.2 VAS (L): 14.76 Qes: 0.48 Qms: 4.74 Qts: 0.44 Le (mH): 3.18 BL (NA): 27.26 Mms (Grams): 358.64 Cms (uM/N): 40.47 Sens (dB @ 1w/1m): 85.19 Xmax: 30mm Subwoofer Measurements: Displacement (Inches): .19cu ft Depth (Inches): 7.75" Cutout (Inches): 11.01" Motor Diameter (Inches): 9.68 Ported Enclosure Specs: Ported Enclosure Size: 2.0cu ft Recommended Port Area: 32sq in Recommended Port Tuning: 35hz Sealed Enclosure Specs: Sealed Enclosure Size: 1cu ft 4th Order Enclosure Specs: 4th Order Sealed Side: .75cu ft 4th Order Ported Side: 2.25cu ft 4th Order Port Area: 45sq in 4th Order Port Length: 6"
