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Sundown Audio X V.4 8" D4 (Open Box, Great)

1000W RMS 8" X Series Dual 4-ohm Car Subwoofer

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• RMS Power: 1000 watts
• Impedance: Dual 4 ohm
• Mount depth: 7.56"
• Sensitivity: 79.8 dB

Learn more about the xv48d4_obg

We apologize

This item has been discontinued

Description


Sundown Audio brand icon

Authorized dealer

Item Condition - Open Box, Great:

This product works like new, is well-cared-for and in great condition. May show limited signs of wear or use and may be missing non-essential parts, accessories or original packaging.

Sundown Audio X-8 v.4 D4 8" (X8V4D2)

2500W Peak (1250W RMS) 8" X Series Dual 4-ohm Car Subwoofer (SW-XV48D4)
Quantity: 1

Product Details:

  • 8" Dual 4 ohm X Series Subwoofer
  • Power Handling:
    • Peak: 2500 watts
    • RMS: 1250 watts
  • Pressed Paper Cone
  • Pressed Foam Surround
  • Hyper-extended pole construction
  • Finite Element Analysis (FEA) optimized spider and surround
  • Newly revised version of classic custom-tooled 8" frame
  • Features an aluminum magnet ID shorting ring for reduced distortion
  • Motor and coil are capable of 20 mm of linear x-max one-way
  • 2.5" High Temperature Voice coil
  • 19 mm Xmax
  • Triple Stacked magnet motor structure
  • Resonance Frequency (Fs): 44.15 Hz
  • Sensitivity: 79.8 dB
  • Recommended sealed box volume: 0.3 cubic feet - 0.4 cubic feet
  • Recommended ported box volume: 0.75 cubic feet - 1 cubic feet
  • Top-mount depth: 7.56"
  • Cutout diameter: 7.32"
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Individually

Subwoofer Wiring Guide


Wiring Guide to Wire 1 Sundown Audio X V.4 8" D4 (Open Box, Great) Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Sundown Audio X V.4 8" D4 (Open Box, Great) 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 X V.4 8" D4 (Open Box, Great) Subwoofers

Mono Amp

4 Channel Amp

Wiring Guide to Wire 4 Sundown Audio X V.4 8" D4 (Open Box, Great) Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Specifications & Details


Subwoofer Specifications
Series
X Series
Subwoofer Size
8"
RMS Power Handling
1000 watts
Voice Coil(s)
Dual
Impedance (Per Voice Coil)
4 ohm
Voice Coil Diameter
3"
Sensitivity
79.8 dB
Xmax (millimeters)
19 mm
Subwoofer Design
Round / Circle
Main Cone Color
Black
Magnet Structure
Triple Stacked
Subwoofer Grille
No
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Sealed
Minimum Sealed Box Volume
0.3 cubic feet
Maximum Sealed Box Volume
0.4 cubic feet
Minimum Ported Box Volume
0.75 cubic feet
Maximum Ported Box Volume
1 cubic feet
Top-Mount Depth (Mounting Depth)
7.56"
Cutout Diameter
7.32"
Shallow Mount Installation
No
T/S Parameters (Electromechanical)
Free-Air Resonance (Fs)
44.15 Hz
Equivalent Compliance (Vas)
3.56 liters
Total Speaker Q Value (Qts)
0.41
Electrical Q Value (Qes)
0.5
Electrical Resistance of Voice Coil (Re)
6 ohm
Mechanical Q Value (Qms)
2.3
What is in the box?
Paperwork
User manual
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:

XV48D4_OBG

Weight:

32.00lbs

Internal SKU:

xv48d4_obg

Internal Product ID:

224503

Customer Ratings & Reviews


Sundown Audio X V.4 8

5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
4
Features
5
Design
5
Usability
5

Customer Photos & Videos


Customer Reviews

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The following review is for SW-XV48D4, which is a part of the bundle you are viewing.
By Guillermo on May 22, 2026 Checkmark Icon Verified purchase


The following review is for SW-XV48D4, which is a part of the bundle you are viewing.
By Barrie on March 1, 2026 Checkmark Icon Verified purchase


Amazing sound!!

The following review is for SW-XV48D4, which is a part of the bundle you are viewing.

Wanted to dip into the
lows ,and still thump a little… just barely breaking it in-but I couldn’t be happier with the sound quality. I was genuinely shocked. I fully expected it to thump and hit low, but didn’t realize it was gonna sound this good while doing it. Time will tell how it holds up… but so far this thing is outstanding. I can’t wait to crank it up after a little break in period.

By John on August 10, 2025 Checkmark Icon Verified purchase




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