Name: Sundown Audio X V.4 8" D4 (Open Box, Great)
Brand: Sundown Audio
SKU: xv48d4_obg
Price: 359.99 USD
Availability: Discontinued
Rating: 5.0000 (3 reviews)

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Product highlights

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

Learn more about the xv48d4_obg

Description

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

RMS Power Handling

1000 watts

Voice Coil(s)

Dual

Impedance (Per Voice Coil)

4 ohm

Voice Coil Diameter

Sensitivity

79.8 dB

Xmax (millimeters)

19 mm

Subwoofer Design

Round / Circle

Main Cone Color

Black

Magnet Structure

Triple Stacked

Subwoofer Grille

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

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

Customer Ratings & Reviews

Overall rating distribution

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4 star		0%
3 star		0%
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By feature average rating

Durability		5
Value		4
Features		5
Design		5
Usability		5

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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

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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

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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

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