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Home/Equipment/Subwoofers/Sundown Audio/X-Series v.4 8" Subwoofer
Sundown Audio X-Series v.4 8-inch Subwoofer - Dual 2-Ohm DVC - Black pressed paper cone, high-roll foam surround, large vented magnet, push terminals
Sundown Audio/Subwoofer/X-Series

X-Series v.4 8" Subwoofer

Replaces the previous generation: X-Series v.3 8" 800W X-8 Subwoofer

1250 Watts RMS / 2500 Watts Peak Dual 2 or 4 ohm voice coil Triple-stacked magnet 2.5” voice coil Hyper-extended pole The X-8 v.4 is THE KING of standard cut-out size 8" subwoofers and it sets the standard for others to follow. It builds on the legacy of the v1, v2, and v3 models but definitively out-performs all previous generations. The secret sauce is largely in the painstakingly FEA optimized spider and surround. It's hard to overstate the impact of proper suspension design on a subwoofer but anyone who has used the X-8 v.4 can attest that we've nailed it here. Beyond the suspension - the X-8 v.4 is built on a newly revised version of our classic custom-tooled 8" frame. It represents the absolute maximum performance possible on this frame platform. The motor and coil are capable of ~20mm of linear x-max one-way and around 2.4" p-p before the coil leaves the gap (with a little beyond that before any physical bottom is reached). As with most of our subs it also features an aluminum magnet ID shorting ring for reduced inductive distortion as well as a few other secret Sundown tricks for distortion reduction!"
Used in 0 builds
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Specifications

rms watts
1250 W
impedance ohms
4 Ω
voice coil config
DVC
Thiele-Small Parameters

Measured at small signal levels per AES standards

Impedance:
Electromechanical
Fs(Resonant frequency)
44.15 Hz
Re(DC resistance)
6 Ω
BL(Force factor)
27.14 T·m
Q Factors
Qts(Total Q)
0.409
Qes(Electrical Q)
0.497
Qms(Mechanical Q)
2.3
Compliance & Mass
Vas(Equiv. volume)
3.56 L
Mms(Moving mass)
220.1 g
Excursion
Xmax(Linear excursion)
19 mm

Parameters measured per AES2-1984 (r2003) standards. Small-signal parameters valid within linear operating region.

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Compare Prices(2 retailers)
Sparked Innovations
Sparked InnovationsBest Price
Available
$399.99
Updated 3/24/2026
S
Sparked InnovationsBest Price
Available
$399.99
Updated 3/22/2026
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Frequently Asked Questions

What is the Sundown Audio X-Series v.4 8" Subwoofer?

The Sundown Audio X-Series v.4 8" Subwoofer is a car audio equipment made by Sundown Audio. View full specifications and where to buy on this page.

How much does the Sundown Audio X-Series v.4 8" Subwoofer cost?

The Sundown Audio X-Series v.4 8" Subwoofer typically sells for $320 to $400 depending on the retailer and variant. Check the "Where to Buy" section for current pricing from authorized dealers.

Where can I buy the Sundown Audio X-Series v.4 8" Subwoofer?

You can purchase the Sundown Audio X-Series v.4 8" Subwoofer from authorized dealers listed in the "Where to Buy" section on this page. We recommend buying from authorized retailers to ensure warranty coverage and genuine products.

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