Garage
Shop
Account Icon
Account
Box Icon
Track
order
Telephone Icon
Call
Help Icon
Help
Door with Arrow Icon
Sign In
  1. Home
  2. MTX Store
  3. Discontinued MTX Car Audio & Electronics
  4. Discontinued MTX Car Subwoofers
  5. Discontinued MTX Empty Car Subwoofer Enclosures & Boxes
  6. Discontinued MTX Ported & Vented Subwoofer Boxes

Discontinued MTX Ported & Vented Subwoofer Boxes for your 1978 Opel close

Enhance your audio experience with MTX's Ported & Vented Subwoofer Boxes.

Filters
MTX ✕
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.
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.
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Subwoofer Cutout Shape
This is the shape of the enclosures cutout hole and defines the style of subwoofer that can be installed.
Box Exterior Color
The color of the enclosure's exterior/outer finish.
Total Box Volume
The internal volume measurement in cubic feet before subwoofer magnet displacement.
Cutout Diameter or Length
The actual diameter of the hole in the subwoofer box. Length is the measured length per side of a square subwoofer or speaker opening.
Maximum Speaker Depth
Your subwoofer or speaker must not exceed this dimension in order to properly mount in this enclosure.
Box Style/Shape
The box style or shape refers to the actual shape of the box. Square and rectangular boxes are straight-edged boxes on all sides, whereas hatchback and truck style enclosures feature an angled front or back design that allows for installation in places short on depth such as single cab pickup trucks. You can also use such enclosures in hatchback cars or other vehicles where space is a premium. Tube and cylinder shaped boxes were made popular by Bazooka and are a great option for those looking for a nice amount of bass without sacrificing lots of space. They may even fit in locations that slim truck boxes cannot fit in. If the enclosure is vehicle specific, we encourage you to read the product description to find out which vehicles the enclosure is made for.
Condition

Your Vehicle

close
Exclamation Icon
Fitment data is not available for your 1978 Opel
Universal-fit product options below.
Update vehicle | Remove vehicle | Vehicle store

Shop the Category

filter-icon Filters & Sort
You are currently viewing discontinued products.

Bass Slammer BS110V-SQ

10" Vented Square Cutout Sub Enclosure Specifically Built for a Kicker L5 or L7 Solo-Baric 10" Subwoofer

BS110V-SQ big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Bass Slammer BS110V-SQ

10" Vented Square Cutout Sub Enclosure Specifically Built for a Kicker L5 or L7 Solo-Baric 10" Subwoofer

Ported enclosure built by MTX Audio to actually match a 10" Kicker L5 or L7 Solo-Baric woofer • Originally built as a special purchase for Circuit City by MTX, but Circuit City backed out of the deal • Square Cutout • Slot Port • 1.5 Cubic ft. Airspace • Fb 33Hz

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

Ported enclosure built by MTX Audio to actually match a 10" Kicker L5 or L7 Solo-Baric woofer • Originally built as a special purchase for Circuit City by MTX, but Circuit City backed out of the deal • Square Cutout • Slot Port • 1.5 Cubic ft. Airspace • Fb 33Hz

Bass Slammer BS112V-SQ

12" Vented Square Cutout Sub Enclosure Specifically Built for a Kicker L5 or L7 Solo-Baric 12" Subwoofer

BS112V-SQ big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Bass Slammer BS112V-SQ

12" Vented Square Cutout Sub Enclosure Specifically Built for a Kicker L5 or L7 Solo-Baric 12" Subwoofer

Ported enclosure built by MTX Audio • Originally built as a special purchase for Circuit City by MTX, but Circuit City backed out of the deal • Square Cutout • Slot Port • 3.0 Cubic ft. Airspace • Fb 33Hz

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

Ported enclosure built by MTX Audio • Originally built as a special purchase for Circuit City by MTX, but Circuit City backed out of the deal • Square Cutout • Slot Port • 3.0 Cubic ft. Airspace • Fb 33Hz

MTX Audio SledgeHammer SLH12X2U (Unloaded)

12" Bass Slammer Dual Unloaded Subwoofer Enclousure (Sledge Hammer Edition)

SLH12X2U big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

MTX Audio SledgeHammer SLH12X2U (Unloaded)

12" Bass Slammer Dual Unloaded Subwoofer Enclousure (Sledge Hammer Edition)

12" Bass Slammer Dual Unloaded Subwoofer Enclousure • Sledge Hammer Edition • Front Slot Ports • 3/4" MDF Construction • High Gloss Black Vinyl Baffle • Compatible With 12" MTX 8500 And 9500 Subwoofers

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

12" Bass Slammer Dual Unloaded Subwoofer Enclousure • Sledge Hammer Edition • Front Slot Ports • 3/4" MDF Construction • High Gloss Black Vinyl Baffle • Compatible With 12" MTX 8500 And 9500 Subwoofers

MTX Audio SledgeHammer SLH15X2U (Unloaded)

15" Bass Slammer Dual Unloaded Subwoofer Enclousure (Sledge Hammer Edition)

SLH15X2U big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

MTX Audio SledgeHammer SLH15X2U (Unloaded)

15" Bass Slammer Dual Unloaded Subwoofer Enclousure (Sledge Hammer Edition)

15" Bass Slammer Dual Unloaded Subwoofer Enclousure • Sledge Hammer Edition • Front Slot Ports • 3/4" MDF Construction • High Gloss Black Vinyl Baffle • Compatible With 15" MTX 8500 And 9500 Subwoofers

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1

15" Bass Slammer Dual Unloaded Subwoofer Enclousure • Sledge Hammer Edition • Front Slot Ports • 3/4" MDF Construction • High Gloss Black Vinyl Baffle • Compatible With 15" MTX 8500 And 9500 Subwoofers

MTX SLH15

15" Single Round Sledgehammer Unloaded Enclosure Subwoofer

SLH15 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

MTX SLH15

15" Single Round Sledgehammer Unloaded Enclosure Subwoofer

• 15" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 2.15 cubic feet
• Progressive slot port for more bass and less noise
• Quick and easy assembly as screws and cables are included
• Vinyl and carpet finish with embroidered MTX logo at the top

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

• 15" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 2.15 cubic feet
• Progressive slot port for more bass and less noise
• Quick and easy assembly as screws and cables are included
• Vinyl and carpet finish with embroidered MTX logo at the top

MTX SLH10S (Like New (Open Box))

10" Sledgehammer Unloaded Enclosure For Single Square Subwoofer

SLH10S big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

MTX SLH10S (Like New (Open Box))

10" Sledgehammer Unloaded Enclosure For Single Square Subwoofer

• 10" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Vinyl and carpet finish with embroidered MTX logo at the top
• Progressive slot port for more bass and less noise
• Quick and easy assembly as screws and cables are included

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

• 10" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Vinyl and carpet finish with embroidered MTX logo at the top
• Progressive slot port for more bass and less noise
• Quick and easy assembly as screws and cables are included

 
    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

    1990 Mitsubishi Eclipse

    1978 Buick Opel

    2002 Ford Expedition

    2018 Mazda 6

    2017 Chevrolet Bolt EV

    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 1978 Opel
    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