Sundown Audio UV18D4 U-8" D4 750W RMS 8" U Series Dual 4-ohm Car Subwoofer 1500W MAX
Massive Power & Clarity
Superior Performance
Advanced Technology
Premium Quality
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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. |
Free shipping in the 48 U.S. states. Orders placed before 11 PM ET process next business day; shipping takes 5–8 days. Tracking info is emailed once shipped. To cancel, contact info@eliteautogear.com within 24 hours. Processed orders can’t be canceled. Thank you for choosing Elite Auto Gear!
Customer Support : 9:00 am to 5:00 pm
Address: 13446 Alondra Boulevard, Cerritos ,California 90703, United States
Email: info@eliteautogear.com
Phone: (877)-215-8187
From Boats to Jeeps to UTVs
Built to Be Heard Everywhere You Ride
Power That Dominates
Pushes up to 900W peak / 300W RMS for crystal-clear highs and bass that cuts through wind, waves, or trails.
Built for Tough Rides
Engineered to withstand extreme conditions with rugged construction and weatherproof design.
Built for Power & Durability
Premium materials and advanced engineering ensure long-lasting performance in any environment.
Immersive Sound & Lighting
Experience rich, immersive audio with synchronized lighting effects that enhance every adventure.
Upgrade Your Ride With Pro-Level Sound
What Our Customers Are Saying
⭐ 4.9 stars reviews, Loved by Thousands
"Great packaging and super loud speakers would recommend buying and got delivered fast"
M**I
Verified Customer
"Installed Apocalypse 6.5 mids, DS18 tweeters, and Orion 6x9s in my 2014 Dodge Challenger RT — amazing sound! Quality and materials are top-notch. Definitely buying from them again."
B.
Verified Customer
"10 de 10 con el envío super rápido espero que si tengan buen sonido estan muy bonitas"
werita&chukito3
Verified Customer
"Definitely a must can't wait to install all my speakers I would buy from them again I got the apocalypse 6.5 mid range ds18 tweeters 3.5 full range and Orion 6x9 mid range"
Verified Customer
"Me gustó mucho buena calidad Y suena recio como yo pensaba si se las recomiendo buen sonido"
Verified Customer
"The speakers were loud and good"
B.
Verified Customer
"Great product but it only comes with one tweeter so make sure you buy 2"
obs_brycen
Verified Customer
"Súper buena calidad, buen sonido de voz, y llega en buenas condiciones"
s**a
Verified Customer
"Received them and they work as i expected"
bmtmanuel
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"They got here before estimated arrival and are in amazing condition"
**l
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"Muy buen producto de escucha muy bien"
M**S
Verified Customer