We are a Sundown Audio authorized dealer so you get up-to-date, fully warrantied products.
General Features:
- RMS 400 watts
- Dual 2 or 4 ohm voice coils
- Optimized for small ported enclosures
- Aluminum 1.75” 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
Perfect for high-power underseat enclosures and designed to be at home in the competition lanes or playing your favorite tunes, the U Series is the premier “standard suspension” woofer in the Sundown lineup. A double-stacked 9” wide ferrite magnet system is coupled to a thick top plate. A thick set of shorting rings are also used inside the magnets and on the pole cap, smoothing out frequency response while doubling as a heat sink and airflow guide. An all-new, substantially thicker custom aluminum frame was designed specifically for the U Series, and equipped with heat-dissipation ribs. The v.2 motor also features an extended pole piece to keep the coil controlled under high stress!
Brand | Sundown Audio Sale Items |
T/S SPECS | U-6.5SW" D2/U-6.5SW" D4 |
RE (Ohms) | 4.0586/6.6274 |
FS (Hz) | 41.9533/38.6925 |
VAS (L) | 2.9053/3.7701 |
Qes | 0.5238/0.5005 |
Qms | 8.5834/7.247 |
Qts | 0.4937/0.4681 |
Le (mH) | 4.0112/5.5892 |
BL (NA) | 16.7428/20.0082 |
Mms (Grams) | 137.2546/124.3518 |
Cms (uM/N) | 104.8528/136.0613 |
Sens (dB @ 1w/1m) | 77.8706/78.146 |
Xmax | 19mm/19mm |
Size | .25-.35 cu. ft. net |
Port Area | 4-5 sq. in. |
Port Tuning | 35hz -40hz |
Size | 0.125-0.2 cu. ft. net |
Displacement | .04 cu. ft. |
Depth | 5.71" |
Outside Diameter | 7.17" |
Cutout | 5.94" |
Parts Warranty | 1 Year |
Labor Warranty | 1 Year |