Sundown Audio UV18D4 U-8" D4 750W RMS 8" U Series Dual 4-ohm Car Subwoofer 1500W MAX
The Sundown Audio SW-UV18D4 U-8" D4 subwoofer is designed to deliver powerful bass with impressive sound quality. It features dual voice coils and a durable aluminum voice coil for reliable performance. Built to last, it includes a sturdy cast basket and spring-loaded terminals. This subwoofer is perfect for enhancing your car audio experience, whether you prefer ported or sealed enclosures.
Features:
• Power Handling: RMS 750 Watts, MAX 1500 Watts
• Impedance: Dual 4 ohm
• Mount depth: 6.02"
• Sensitivity: 81.6 dB
Specifications:
Power Handling: 750 watts RMS, 1500 watts peak
Impedance: Dual 4-ohm voice coils
Voice Coil: 2.25" high-temperature aluminum
Sensitivity: 81.6 dB
Resonance Frequency (Fs): 41.288 Hz
Xmax: 18 mm
Mounting Depth: 6.02"
Cutout Diameter: 7.3"
Recommended Enclosure: Ported: 0.65 - 0.75 cubic feet, tuned to 35 Hz Sealed: 0.3 cubic feet
| Specification | Details |
|---|---|
| Model | SW‑UV18D4 (U Series 8″ D4) |
| UPC | 810111131162 |
| Power Handling | 750 W RMS / 1500 W Peak |
| Impedance | Dual 4 Ω Voice Coils |
| Sensitivity | 81.6 dB |
| Resonance Frequency (Fs) | 41.29 Hz |
| Xmax | 18 mm |
| Mounting Depth | 6.02″ |
| Cutout Diameter | 7.3″ |
| Voice Coil | 2.25″ High-Temp Aluminum Voice Coil |
| Recommended Sealed Box | ≈ 0.30 ft³ |
| Recommended Ported Box | 0.65–0.75 ft³, tuned to 35 Hz |
| Basket | Cast basket with spring‑loaded terminals |
| Cooling & Vents | Rear-gap vented, aluminum shorting rings for heat relief |
| Surround | Double-stitched |
| Dimensions | Mount depth: 6.02″ / Cutout: 7.3″ / Motor diameter: ~6.14″ |
| Recommended Uses | Ported or sealed enclosures for high-impact mobile audio setups. |