Sundown Audio

SUNDOWN AUDIO X Series v.2 18" (1500-watts) -DVC-4OHM

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  • Sundown Audio SUNDOWN AUDIO X Series 18 v.2 1500-watts - D4
  • Sundown Audio SUNDOWN AUDIO X Series 18 v.2 1500-watts - D4
  • Sundown Audio SUNDOWN AUDIO X Series 18 v.2 1500-watts - D4
  • Sundown Audio SUNDOWN AUDIO X Series 18 v.2 1500-watts - D4
  • Sundown Audio SUNDOWN AUDIO X Series 18 v.2 1500-watts - D4
  • Sundown Audio SUNDOWN AUDIO X Series 18 v.2 1500-watts - D4
  • Sundown Audio SUNDOWN AUDIO X Series 18 v.2 1500-watts - D4
MSRP: $1,019.99
Now: $569.99
Was: $689.99
— You save $450.00


.75 DEPTH 

The X v.2 series is the first driver in the Sundown woofer line-up to offer our "ultra-high excursion" suspension and frame designs. The 10, 12, and 15" models feature our custom tooled and patented frames (US Patent Numbers D691596, D691597, and D691598) and the 18" model uses the tried and true 18" 6-spoke with a custom tooled adapter to allow for a full 10" diameter spider. Optionally our custom tooled 18” frame is available for an extra charge (US Patent Number D741841) – this frame utilizes an 11” spider & changes the coil configuration availability changes to D1 & D2.

We mate these new platforms to a triple stacked 220mm (8.66”) diameter motor structure featuring a hyper-extended pole and extreme clearances (allowing up to 4" p-p travel before mechanical bottom). This motor drives a 3" diameter 4-layer CCAW coil wound on a thick aluminum former to incredible levels of excursion. For the v.2 revision we upgraded the coil to a new “black coil” design which handles significantly more heat than the coil form the X v.1 series.

The X v.2 series was designed from the ground-up to become the new standard in the low-frequency / small ported box subwoofer category in this price range. They will work in the same small enclosures that you are used to using for Sundown Audio subwoofers, although, the will tolerate enclosures up to about 50% larger than those if you desire even more low-end extension.

The X v.2 series is really a different kind of woofer due to its incredibly linear suspension. They are designed for the LOWEST level of bass extension possible in a small enclosure while maintaining extremely low levels of distortion.

One of the most obvious changes from the v.1 series is the much larger motor structure (220mm vs. 190mm on the v.1 series). The motor ventilation has also been improved and we also upgraded to the all-new Mega-Roll v.2 surround which is a more linear & more rugged update to our world-famous Mega-Roll v.1 surround design.

Features & Technology:

  • Xmax = 30mm one-way by 70% BL
  • RMS Power = 1500-watts
  • * Vented magnetic gap
  • * Optimized high-velocity pole vent
  • * Innovative high-velocity vented frame spacer ring
  • Black Aluminum 3” voice coil former for superior heat dissipation
  • High Temperature Round-Wire CCAW voice coil with high-temp black adhesive
  • ** The 18” model with optional tooled Sundown Frame uses a 4-Layer Flat Wire / All Aluminum Coil that is ~30% longer
  • Large aluminum faraday ring (Magnet ID)
  • Spring Loaded Terminals
  • Stitched-On Double-XL Tinsel Leads to prevent fatigue and failure
  • Mega-Roll v.2 Surround Technology
  • High strength, custom tooled & patented cast aluminum frame
  • Optimized for small ported & band-pass enclosures

* -- These features combine to create the optimized coil ventilation system.

Specifications X 18" D4
RE (ohms)   6.1 ohm
FS (Hz)   27.7 hz
Vas (L)   137.7L
Qes   0.54
Qms   5.12
Qts   0.49
Le (mH)   4.00 mH
BL (NA)   29.8
Mms (Grams)   454.0 g
Cms (uM/N)   0.07 mm/N
Sens (1w/1m)   89.2 db


X 18" V2
Sealed N/A
Ported 7.00 ft^3
Displacement 0.23 ft^3
Depth 12.75
Outside Diameter 18.42"
Cut-Out 16.69"
Recommended Tuning 32hz
Recommended Port Area 112 in^2

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Warranty Information

Warranty Information

Sundown Audio requires us to send customers with equipment problems directly to them for all warranty and non-warranty claims. Please follow their proceedures..


Sundown Audio RMA form:

Sundown Audio Product Warranty Information:


Sundown Audio - Hours of Operation

Monday 9am - 5pm EST
Tuesday 9am - 5pm EST
Wednesday 9am - 5pm EST
Thursday 9am - 5pm EST
Friday 9am - 5pm EST
Saturday Closed
Sunday Closed
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16 Reviews

  • 5
    X10v2 d4

    Posted by Orion on Sep 07, 2023

    As always steller quality!! 10 10 highly recommended

  • 5

    Posted by Joshua James on Aug 02, 2022

    By for the biggest and baddest subs I've ever owned. Can't wait to get these bad boys in the back of my truck. Thanks down4sound.

  • 5
    18 Xv2 d4

    Posted by Brian f on Mar 24, 2022

    I love this sub!!! Not my first sundown but the biggest and best I’ve owned. Running it on a Skar skv2 3500 at 2 ohms 2050 watts is what it’s rattling is at 2 ohms. No where near enough power. This thing shakes my whole car and is barely moving. Sundown you and the staff at D4S are my HEROS. Great product’s from a great company. Thanks for everything

  • 5
    Sundown x18

    Posted by Kevin on Dec 31, 2021

    Thank you Jp, Really happy with shipping time and been happy with sundown i been running the subs for years now ill let you know how the x18 dose's when I complete my build and thank for the tee shirt and volt meter keychain i will be letting people in mile high know about your company Down 4 Sound so thank you to your team

  • 5

    Posted by Jordon Miller on Mar 23, 2021

    Amazing, so fast shipping. Ordered on the 15th received it on 18th!

  • 5
    Beast mode

    Posted by Christopher Nelson on Dec 28, 2020

    This thing is stunning to look at absolute monster sub don't have mine hooked up yet box is being built but man you can tell it's gonna be brutal the detail and quality is unbelievable sundown baby thinks jp and d4s got pretty much my whole system from ya'll sub shipped to my door in two days can't be beat

  • 3

    Posted by Demetrius Greene on Mar 14, 2020

    Very happy with subwoofer but nit happy on the super fast shipping.

  • 5
    4 Sundown 18 xV2 d4

    Posted by Stephen Talbot on Dec 04, 2019

    I want to say, Thanks JP at for the awesome bass head gear and fast shipping!! I cant wait to hook everything up in my Jeep Cherokee. I already have a Zv5 18 in my Hyundai Tiburon, and boy that thing is a beast!! I truly recommend Down4sounds for your car audio needs!

  • 5

    Posted by samuel smith on May 12, 2019

    probably one of the most reliable and dynamic subs on the market i have one x18 on a taramps 8k and 1 ohm does just fine my bandwidth goes from 48hz to as low as 18hz in a flatwall slot ported enclosure in a 1990 accord deff an awesome buy

  • 5
    X v2 18

    Posted by Leonard on May 09, 2019

    Product came on time. Can’t wait to order my second one.

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