Garage
Shop
Account Icon
Account
Box Icon
Track
order
Telephone Icon
Call
Help Icon
Help
Door with Arrow Icon
Sign In
  1. Home
  2. Stinger Store
  3. Stinger Car Audio & Electronics
  4. Stinger Car Subwoofers
  5. Stinger Custom-fit Subwoofer Boxes
  6. Stinger All Custom-fit Subwoofer Boxes

All Stinger Custom-fit Subwoofer Boxes for your 2018 S4 close

Discover Stinger's all custom-fit subwoofer boxes, designed for a seamless fit and optimized bass in any car.

Filters
Stinger ✕
Show products that do not fit ✕
Clear Filters
Reset Done
Show products that do not fit
Price Range
Number of Subwoofers
This value represents the number of subwoofers that the enclosure accommodates or that are included in the package or bundled kit.
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Box Type
Represents the style of the enclosure. Be sure to purchase the appropriate enclosure type and internal volume that will be compatible with your subwoofer's recommendation.

Sealed - Sealed boxes are those that have no holes or vents in it. The only hole in a sealed box is where the subwoofer is installed. Smaller sealed boxes require more power than a larger sealed box. They provide a tight, accurate bass, while the larger sealed enclosures provide a "boomier" and louder bass.

Ported / Vented - Ported/Vented Enclosures provide an even boomier, louder bass, but less accurate then a small, sealed box. Ported enclosures typically require more airspace per sub and also less power output from an amplifier to perform correctly.

Bandpass - Bandpass enclosures make subwoofers perform efficiently, but loose. The bass is not as "boomy" as a ported enclosure nor as punchy as a sealed enclosure. Bandpass enclosures work well with lower to mid-level subwoofers.
Type of Enclosure
Some of our Vehicle Specific enclosures are loaded with a subwoofer and an amplifier, some are only loaded with a subwoofer, while some are empty boxes.
Deals
Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!
Final Wired Impedance
This is the final impedance of the system as the amplifier will see it. If the final impedance is for two sets, it means that the enclosure has two sets of terminals at the listed impedance.
Box Finish
The material used on the outside of the box. Most boxes are carpeted to prevent exterior scratches; however vinyl is popular as it can often be color-matched to a near exact look of your leather factory interior.

Your Vehicle

close
Universal fit Icon
Explore universal-fit product options for your 2018 S4
Vehicle-specific solutions are not available in this category.
Update vehicle | Remove vehicle | Vehicle store

Shop the Category

filter-icon Filters & Sort

Stinger TXJWB12

400W RMS Loaded Single 12" Sealed Swing Gate Enclosure for select 2007-2026 vehicles from Jeep

TXJWB12 big
Go to item page Right Arrow Icon of Right Arrow

Stinger TXJWB12

400W RMS Loaded Single 12" Sealed Swing Gate Enclosure for select 2007-2026 vehicles from Jeep

• Sealed enclosure with 1 12" Subwoofer
• 400 watts RMS
• Final Impedance: 2-ohm
• Mounts on the vehicle's swing gate
• Dimensions: 28.5" L x 14" H x 6.1" W

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $56.90 in rewards to spend later

No Fit Icon Doesn't fit your S4

4
List price $799.00
-29% $569.00

In stock

Only 1 Left!

Add to Cart

Stinger TXTRB10

800W Peak (400W RMS) Loaded Single 10" Enclosure for select 2007-2020 vehicles from Ford, Chevrolet, GMC

TXTRB10 big
Go to item page Right Arrow Icon of Right Arrow

Stinger TXTRB10

800W Peak (400W RMS) Loaded Single 10" Enclosure for select 2007-2020 vehicles from Ford, Chevrolet, GMC

• 10” Vented Subwoofer Enclosure for Full-Size Trucks and Other Vehicles
• Preloaded with single 10" P-TX10D4 Subwoofers
• Vented enclosure with Durable Texture UAT (Urethane Acrylic Terpolymer) Enclosure Coating
• Enclosure Dimensions: 12.52" TD x 14.13" BD x 18.11" W x 7.72" H

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $57.90 in rewards to spend later

No Fit Icon Doesn't fit your S4

List price $649.00
-11% $579.00

In stock

Only 1 Left!

Add to Cart
 
    Clear all
    why-shoping-with-sonic

    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
    Why Shop With Us?
    Save up to 10 different vehicles in your garage
    Vehicle
    Store     Delete

    2018 Audi S4

    1995 Mazda MX-6

    2007 Buick Allure

    2013 Jeep Compass

    2018 Ford Explorer

    2001 Suzuki Esteem

    1960 Chrysler Windsor

    1992 Ford Escort

    2017 Audi A3

    1991 BMW 525i

    Add vehicle Clear all vehicles
    Where to find vehicle info
    Are you sure you want to clear your garage?
    This action cannot be undone. Confirm

    Cancel

    This category was not designed for products.
    If you continue, you will be redirected to a category customized for your vehicle. Continue

    Cancel

    Shop your 2018 S4
    Why Use a Vehicle Fit Guide?
    Change vehicle | Shop without vehicle
    Whoa! Slow down. Add your details below!
    additional information required
    Add vehicle details to confirm fitment
    Ignore fitment details
    Find stereos and more that work -- fast.

    Additional information:

    Remove

    Can't find your vehicle? Click here and we'll help.

    Where to find vehicle info

    Go to Fitment

    Didn't find your car?

    Submit your details and we'll help!
    Please enter the letters as they are shown in the image above. Letters are not case-sensitive.
    Identify your vehicle and submodel details
    • Owner's manual
    • Vehicle's insurance card
    • Vehicle registration
    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
    Car Info Side Door Icon
    Vehicle Registration Icon
    Vehicle Insurance Icon
    Back

    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

    Back
    Track your order
    Call our experts
    Support Center
    Return & Exchanges
    Follow on Instagram Instagram logo
    Subscribe on YouTube YouTube logo