Single 18" Ported Subwoofer Enclosure

47 Reviews

Current Price:$249.99
Sale Price:


Skar Audio introduces its SK series line-up of high-performance subwoofer enclosures to bridge the gap between competition-grade quality and universal fit pre-fabricated enclosures. The SK1X18V subwoofer enclosure is a 18-inch, universal fit, ported, subwoofer enclosure that is designed for maximum bass and responsiveness. Finished in a premium black carpet and featuring the Skar Audio logo on the lower left side, this enclosure will look sleek and attractive in any application.
When setting out to offer a line-up of premium, universal fit, subwoofer boxes, the end goal was to deliver a final product that was unlike anything else available on the market; setting new standards for quality and performance. The enclosure features a kerf style port, which means that the port construction utilizes the curves typically found only in custom, high-end, professional enclosures, allowing the box to offer deeper and more accurate bass. Furthermore, it’s precisely tuned to ensure that it delivers riveting low-end frequency response and the type of bass that turns heads from outside the vehicle.
The differentiating features that put this box in a league of its own don't stop there though; this 18-inch vented enclosure also utilizes high-end materials during construction, ensuring durability and reliability. On top of its outstanding craftsmanship, this box is also braced for extreme strength, and can handle even the most brutally powerful subwoofers. Internally, we line several walls of the enclosure with poly-fill to enhance the overall versatility and depth of sound that this enclosure reproduces with any given subwoofer. The premium push terminal wiring cup, that is built into the side of the enclosure, features 16-gauge speaker wire that is pre-soldered and connected to the terminals, making it easier than ever to wire up and install your subwoofer.
Product Info
General Specifications
Wood Type
Fitment Type
Enclosure Type
Wood Thickness
Enclosure Finish
Fits How Many Subs
Enclosure Finish Color
Subwoofer Compatibility Size
Internal Speaker Wire Leads Pre-soldered
12 AWG
External Push Terminal Wire Gauge Opening
Technical Specifications
Port Width
Number of Ports
Total Box Volume
4.75 Cubic Ft
Number of Subwoofer Chambers
Tuning Frequency of Enclosure
29 Hz
Number of Terminal Cup Connections
Enclosure External Dimensions
Depth 2 (Top) - Front to Back
Subwoofer Mounting Parameters
Subwoofer Hole Cut-out Diameter
Subwoofer Maximum Mounting Depth
Compatibility Chart
SDR-18 D2/D4
ZVX-18 D2/D4

Shipping Image
Returns Image
Money Back Logo
Warranty Image

Customer Reviews


Based on 47 reviews

  • Great Low Bass And Nice Punch. I Love The Rectangualar Port. Great Comprimise Vs Dual Woofer System
    Reviewed on 6/23/2020 by JIm
    Verified Buyer
    I was very surprised at how well constructed it was. The box had a nice smell to it like it was newly manufactured (wood glue smell). I used this sub in a 2008 Chevy Avalanche to
  • I
    Reviewed on 4/21/2020 by Steven
    Verified Buyer
    I the 18
  • Awesome Sub!
    Reviewed on 9/28/2021 by Andrew
    Verified Buyer
    Best sub I’ve owned hands down. I would recommend this to anyone and everyone
  • Corner Damaged, But Solid
    Reviewed on 12/25/2020 by Calen
    Verified Buyer
    Arrived with a pretty dinged corner, but I had planned on modifying it anyhow. Rock solid box that specs out about like described. And unlike another review here, it came with 10ga
  • Awesome
    Reviewed on 5/13/2020 by Jason
    Verified Buyer
    Dropped a 1975 250 watt 8ohm cerwin-vega in this 18in box, pushing it with a cheap Dual 600watt amp...sounds incredible considering....Im convinced anything will sound great in t
  • Da Ting Go Skrrra
    Reviewed on 4/10/2022 by Benjamin
    Verified Buyer
    Provides retaliation options against upstairs neighbors
  • 18" Subwoofer Enclosure
    Reviewed on 10/2/2020 by James
    Verified Buyer
    great sturdy box and sounds great.
  • Fits Great In 99 CRV
    Reviewed on 9/28/2020 by Ryan
    Verified Buyer
    Who needs trunk space? Fits perfect in my 99 Honda CRV. Im probably going to mount handles and feet on this enclosure so I can throw it in my living room home theater for wh
  • Great Prefabricated Box.
    Reviewed on 9/18/2020 by Brian
    Verified Buyer
    This box is amazing. My 18 zvx sounds phenomenal with the SK-1500 Mike recommend I get with this sub. Thanks Skar for making a great box and sub.
  • Perfect Fit
    Reviewed on 7/10/2020 by Tyler
    Verified Buyer
    Arrived undamaged. Fits perfectly in a grand marquis/crown Victoria trunk with 15” to spare on both sides. So still plenty of trunk left.
  • 18” Sub Box undefined Empty
    Reviewed on 7/12/2019 by Rich
    Awesome box well built ....gorgeous
  • Absolutely Perfect
    Reviewed on 6/17/2019 by Craig
    Verified Buyer
    It is a absolute monster it hit's so hard !!!!! Imagine King Kong and Godzilla fighting in your ride!!! And must note they seem like they are not going to stop any time soon.......
  • Subwoofer Box
    Reviewed on 5/21/2022 by John
    Verified Buyer
    Awesome thanks
  • Great Construction.. Perfect Sound.....
    Reviewed on 4/29/2022 by JIM
    Verified Buyer
    My box arrived a day after it was supposed to but it was FedEx's problem. My subwoofer fit in it perfect and it is tuned perfectly for ultra low bass.
  • Awesome
    Reviewed on 4/29/2022 by Berry
    Verified Buyer
    This thing pounds
  • Great Service
    Reviewed on 3/8/2022 by Robert
    Verified Buyer
    Super fast shipping great packaging. Box sounds really good hits hard and hits those lows. Very happy
  • Haven’t Gotten It
    Reviewed on 2/19/2022 by JJ
    Verified Buyer
    Didn’t get it yet
  • Damaged Box
    Reviewed on 12/11/2021 by mickey
    Verified Buyer
    Waiting on return for new box
  • Get on our list!

    * By clicking Sign Up, you agree to receive recurring automated marketing messages, at the phone number provided. Consent is not a condition of purchase. Reply STOP to unsubscribe. Reply HELP to help. Message frequency varies. Msg & data rates may apply. View our Privacy Policy and Term of Service.