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Sundown Audio U-18 v.2 D4 18" Subwoofer – 2000W RMS/4000W Peak, Dual 4-Ohm, 3" Aluminum VC, 30mm Xmax, Heavy-Duty Cast Frame, High Excursion SPL Subwoofer, 88.9dB Sens.
✅ In stock
F
Grade
Analysis Confidence
90%
Price verified Sep 5, 2026 3:11 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- 💰The current price is slightly above the going rate for this product — worth watching for a drop.
- 📉It has been quite a while since a more competitive price was available, lending today's offer solid comparative value.
- 📈Prices have been moving higher lately — waiting risks paying more if that momentum continues.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
2.93/20
Deal Strength
0/20
Momentum
0/10
📝 Product Overview
🏪 Sold by
mytires4less
🚚 Shipping
Free Shipping
Product Details
✓Extreme Power Handling: The Sundown Audio U-18 v.2 D4 18" subwoofer is built for massive bass, boasting an impressive 2000W RMS / 4000W Peak power capability. This makes it ideal for serious competition use or for those demanding the highest levels of low-frequency output and clarity for an immersive audio experience.
✓Optimal Enclosure Versatility: Designed for superior performance in optimized enclosures, this 18-inch subwoofer is ideal for 4.0 cu ft net ported enclosures (tuned to 35Hz with 64 sq in port area) or in substantial 3.0 cu ft sealed enclosures. Its 0.26 cu ft displacement maximizes usable air space within your chosen setup.
✓Advanced Thermal Management: Featuring a 3" aluminum voice coil former and high-temperature copper voice coil, coupled with a solid pole with vent channels, aluminum shorting ring cap, rear gap-venting, and 16 direct air-gap vents, this subwoofer ensures superior thermal management for extended play and reliability.
✓Unmatched Durability & Control: Built with a heavy-duty cast basket, double-stitched surround, and stitched-on heavy-duty tinsel leads, the U-18 v.2 is engineered for maximum longevity. A double-stacked 9.4-inch wide ferrite magnet system and extended pole piece maintain coil control even at 30mm Xmax.
✓Enhanced Acoustic Precision: Shorting rings inside the magnets and on the pole cap smooth out frequency response while acting as heat sinks and airflow guides. The custom, substantially thicker aluminum frame with heat dissipation ribs further supports stable, precise acoustic performance, making it a premier standard suspension woofer for audiophiles.
⚙️ Specifications
Brand
Sundown Audio
Connectivity Technology
Subwoofer
Audio Output Mode
Stereo
Mounting Type
Wall Mount
Material
Aluminum
Model Name
SW-UV218D4
Speaker Type
Multi Room
Special Feature
Bass Boost
Recommended Uses For Product
Subwoofer
Compatible Devices
Smartphone, Tablet, Laptop, Television
Unit Count
1.0 Count
