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Sundown Audio U-8 D4 8" (U8D4)

1500W Peak (750 RMS) 8" U Series Dual 2-ohm Car Subwoofer (SW-UV18D4)

Sundown Audio
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• Peak Power: 1500 watts
• RMS Power: 750 watts
• Impedance: Dual 4 ohm
• Pressed Paper Cone
• Double-Stitched Surround
• Mount depth: 6.02"
• Sensitivity: 81.6 dB

Learn more about the uv18d4
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List price $419.99
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$349.99

 with warranty
Starting at $32/mo or 4 payments of $88 Buy now, pay later and installment payment plans are offered by Afterpay and Affirm. Learn more

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Sundown Audio U-8 D4 8" (U8D4)

100% off


Priced separately $362 98

Promo Savings of $12 99

Total price:

$349 99

Description


Sundown Audio brand icon

Authorized dealer


Sundown Audio U-8 D4

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 motor also includes an extended pole piece to ensure the coil remains controlled even under high stress!


Product Details:

  • 8" Dual 4 ohm U Series Subwoofer
  • Power Handling:
    • Peak: 1500 watts
    • RMS: 750 watts
  • Pressed Paper Cone
  • Double-Stitched Surround
  • Optimized for small ported enclosures
  • Heavy-duty cast basket for added durability
  • Spring-loaded terminals accept up to 8-gauge wire
  • Stitched-on heavy-duty tinsel leads for easy connection
  • Solid pole with vent channels and aluminum shorting ring cap
  • Rear gap-venting and top cooling channels
  • 2.25" High Temperature Copper Voice coil
  • Aluminum voice coil former for superior heat dissipation
  • 18 mm Xmax
  • Double Stacked Ferrite magnet motor structure
  • Resonance Frequency (Fs): 41.288 Hz
  • Sensitivity: 81.6 dB
  • Recommended sealed box volume: 0.3 cubic feet
  • Recommended ported box volume: 0.65 cubic feet - 0.75 cubic feet
  • Top-mount depth: 6.02"
  • Cutout diameter: 7.3"
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Individually

Subwoofer Wiring Guide


Wiring Guide to Wire 1 Sundown Audio U-8 D4 8" (U8D4) Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Sundown Audio U-8 D4 8" (U8D4) Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

Wiring Guide to Wire 3 Sundown Audio U-8 D4 8" (U8D4) Subwoofers

Mono Amp

4 Channel Amp

Wiring Guide to Wire 4 Sundown Audio U-8 D4 8" (U8D4) Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp


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Specifications & Details


Subwoofer Specifications
Series
U Series
Subwoofer Size
8"
Peak Power Handling
1500 watts
RMS Power Handling
750 watts
Voice Coil(s)
Dual
Impedance (Per Voice Coil)
4 ohm
Voice Coil Material
Copper
Voice Coil Diameter
2.25"
Sensitivity
81.6 dB
Xmax (millimeters)
18 mm
Subwoofer Design
Round / Circle
Main Cone Color
Black
Woofer Composition
Pressed Paper
Woofer Surround
Double-Stitched
Magnet Structure
Double Stacked
Magnet Type
Ferrite
Subwoofer Grille
No
Re-Cone Kit Available
No
CTA-2031 Compliant
No
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Sealed
Optimum Sealed Box Volume
0.3 cubic feet
Minimum Ported Box Volume
0.65 cubic feet
Maximum Ported Box Volume
0.75 cubic feet
Top-Mount Depth (Mounting Depth)
6.02"
Cutout Diameter
7.3"
Shallow Mount Installation
No
T/S Parameters (Electromechanical)
Free-Air Resonance (Fs)
41.288 Hz
Equivalent Compliance (Vas)
6.970 liters
Total Speaker Q Value (Qts)
0.431
Electrical Q Value (Qes)
0.519
Electrical Resistance of Voice Coil (Re)
6.34 ohm
Mechanical Q Value (Qms)
2.542
What is in the box?
WITB: Subwoofers
Subwoofer
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

U-8 D4

Weight:

25.00lbs

Internal SKU:

uv18d4

Internal Product ID:

206537

Customer Ratings & Reviews


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