This is a used product that has been professionally rebuilt here at Sundown Audio. It comes with a non-doa warranty only. That means they are guaranteed to work when you receive it but no further warranty afterwards. Let us know within 24 hours of delivery if this product has an issue. We will not warranty any used subwoofer after that time. These potentially have scratches & scuffs on the magnets/motors and will not be in new condition.
- 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
 |