Description
- RMS 600 watts
- Dual 2 or 4 ohm voice coils
- Optimized for small ported enclosures
- Aluminum 2.25” 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
The U Series woofer from Sundown is incredibly versatile, thriving in both competition setups and your daily driver. It features a double-stacked 9” wide ferrite magnet system and a robust top plate. It also incorporates shorting rings within the magnets and pole cap to enhance frequency response, act as a heat sink, and guide airflow. The U Series is equipped with a significantly thicker custom aluminum frame that boasts heat-dissipation ribs. The v.2 motor also includes an extended pole piece to ensure the coil remains controlled even under high stress!
Specifications
| T/S SPECS | U 8" D2 | U 8" D4 |
|---|---|---|
| RE (Ohms) | 3.8 | 6.34 |
| FS (Hz) | 39.387 | 41.288 |
| VAS (L) | 6.345 | 6.970 |
| Qes | 0.412 | 0.519 |
| Qms | 2.474 | 2.542 |
| Qts | 0.353 | 0.431 |
| BL (NA) | 20.00 | 21.45 |
| Mms (Grams) | 175.340 | 145.239 |
| Cms (mm/N) | 93.125 | 102.308 |
| Sens (dB @ 1w/1m) | 81.6db |
81.6db |
| Xmax | 18mm |
18mm |
Enclosure Specs
-
Ported Enclosure
-
Size: .65-.75 cu. ft. net
-
Port Area: 9-12 sq. in.
-
Port Tuning: 35Hz
-
Size: .65-.75 cu. ft. net
-
Sealed Enclosure
-
Size: .3 cu. ft. net
-
Displacement: .09 cu. ft.
-
Size: .3 cu. ft. net
-
Depth: 6.02"
-
Outside Diameter: 8.70"
- Cutout: 7.3"
Specifications
| Product Brand | Sundown Audio |
| Coil | Dual 4 Ohm (D4) Dual 2 Ohm (D2) |
| RMS Power | 600W |
| Diameter | 8" |





