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

Ported & Vented Subwoofer Boxes for your 2009 528i close

Filters
Subwoofer enclosures ✕
Clear Filters
Reset Done
Show products that do not fit
Brands
Product Type
Subwoofer enclosures,
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.
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!
Availability

Your Vehicle

close
Universal fit Icon
Explore universal-fit product options for your 2009 528i
Vehicle-specific solutions are not available in this category.
Update vehicle | Remove vehicle | Vehicle store

Shop the Category

filter-icon Filters & Sort

Atrend 12RP2DV

Empty Dual 12" Vented Enclosure for Rockford Fosgate Punch P2 and P3 Series Subwoofer

12RP2DV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 12RP2DV

Empty Dual 12" Vented Enclosure for Rockford Fosgate Punch P2 and P3 Series Subwoofer

• 12" Dual Ported Subwoofer Enclosure
• Fits Rockford Fosgate Punch P2 and P3 series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium black carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3.1 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $219.99
-18% $179.40
Notify Me

• 12" Dual Ported Subwoofer Enclosure
• Fits Rockford Fosgate Punch P2 and P3 series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium black carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3.1 cubic feet

Atrend 10SMV

Empty Single 10" Shallow Vented Subwoofer Enclosure

10SMV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 10SMV

Empty Single 10" Shallow Vented Subwoofer Enclosure

• 10" Single Shallow Ported Subwoofer Enclosure
• 1" Medium Density Fiberboard (MDF) construction
• Recessed side-panel design
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 0.42 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $79.99
-12% $70.20
Notify Me

• 10" Single Shallow Ported Subwoofer Enclosure
• 1" Medium Density Fiberboard (MDF) construction
• Recessed side-panel design
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 0.42 cubic feet

Atrend 12SPLDV

Empty Dual 12" SPL Vented Subwoofer Enclosure

12SPLDV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 12SPLDV

Empty Dual 12" SPL Vented Subwoofer Enclosure

• 12" Dual SPL Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3.1 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

5
List price $249.99
-24% $189.99
Add to Cart

• 12" Dual SPL Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3.1 cubic feet

Atrend 15SVR - Black Carbon Fiber

Empty Single 15" Vented Subwoofer Enclosure (Black)

15SVR - BLACK carbon fiber big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 15SVR - Black Carbon Fiber

Empty Single 15" Vented Subwoofer Enclosure (Black)

• 15" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Premium plush black carpet finish
• Carbon fiber pattern
• Signature miter and dado construction
• Bonded using proprietary trick glue
• Total box volume: 4.59 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

14
$195.99
Notify Me

• 15" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Premium plush black carpet finish
• Carbon fiber pattern
• Signature miter and dado construction
• Bonded using proprietary trick glue
• Total box volume: 4.59 cubic feet

Atrend 15DQV

Empty Dual 15" Vented Subwoofer Enclosure

15DQV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 15DQV

Empty Dual 15" Vented Subwoofer Enclosure

• 15" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 4.38 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

14
List price $199.99
-20% $159.99
Notify Me

• 15" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 4.38 cubic feet

Atrend 12KDV

Empty Dual 12" SPL Vented Enclosure for Kicker L7R and L7S Series Subwoofers

12KDV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 12KDV

Empty Dual 12" SPL Vented Enclosure for Kicker L7R and L7S Series Subwoofers

• 12" Dual SPL Ported Subwoofer Enclosure
• Fits Kicker L7R and L7S series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 4.5 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

5
List price $209.99
-33% $139.99
Add to Cart

• 12" Dual SPL Ported Subwoofer Enclosure
• Fits Kicker L7R and L7S series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 4.5 cubic feet

Atrend 10LSV

Empty Single 10" SPL Vented Subwoofer Enclosure

10LSV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 10LSV

Empty Single 10" SPL Vented Subwoofer Enclosure

• 10" Single SPL Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 1.6 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

6
List price $149.99
-20% $119.99
Add to Cart

• 10" Single SPL Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 1.6 cubic feet

Atrend 10KDV

Empty Dual 10" SPL Vented Enclosure for Kicker L7R and L7S Series Subwoofers

10KDV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 10KDV

Empty Dual 10" SPL Vented Enclosure for Kicker L7R and L7S Series Subwoofers

• 10" Dual SPL Ported Subwoofer Enclosure
• Fits Kicker L7R and L7S series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3.5 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

5
List price $209.99
-43% $119.99
Notify Me

• 10" Dual SPL Ported Subwoofer Enclosure
• Fits Kicker L7R and L7S series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3.5 cubic feet

Atrend 12KSV

Empty Single 12" SPL Vented Enclosure for Kicker L7R and L7S Series Subwoofers

12KSV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 12KSV

Empty Single 12" SPL Vented Enclosure for Kicker L7R and L7S Series Subwoofers

• 12" Single SPL Ported Subwoofer Enclosure
• Fits Kicker L7R and L7S series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 2.15 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

7
List price $179.99
-33% $119.99
Add to Cart

• 12" Single SPL Ported Subwoofer Enclosure
• Fits Kicker L7R and L7S series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 2.15 cubic feet

Atrend 10JLDV

Empty Dual 10" Vented Enclosure for JL Audio WX-W0-W1-W3 Series Subwoofers

10JLDV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 10JLDV

Empty Dual 10" Vented Enclosure for JL Audio WX-W0-W1-W3 Series Subwoofers

• 10" Dual Ported Subwoofer Enclosure
• Fits JL Audio WX-W0-W1-W3 series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium charcoal carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 2.6 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1

Add to Cart for Low Price

(You can remove it later)

Add to Cart

• 10" Dual Ported Subwoofer Enclosure
• Fits JL Audio WX-W0-W1-W3 series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium charcoal carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 2.6 cubic feet

Atrend BP-12DV

Empty Dual 12" Vented SPL Subwoofer Enclosure

BP-12DV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend BP-12DV

Empty Dual 12" Vented SPL Subwoofer Enclosure

• 12" Dual Ported Subwoofer Enclosure
• 1" Medium Density Fiberboard (MDF) construction
• Engineered for SPL performance
• Ultra plus black carpeting
• Custom finished carbon fiber baffle
• Bonded using proprietary trick glue
• Total box volume: 4.14 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

12
List price $339.99
-32% $229.99
Notify Me

• 12" Dual Ported Subwoofer Enclosure
• 1" Medium Density Fiberboard (MDF) construction
• Engineered for SPL performance
• Ultra plus black carpeting
• Custom finished carbon fiber baffle
• Bonded using proprietary trick glue
• Total box volume: 4.14 cubic feet

Atrend TL-12SV

Empty Single 12" Slammer Vented Subwoofer Enclosure

TL-12SV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend TL-12SV

Empty Single 12" Slammer Vented Subwoofer Enclosure

• 12" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and dado enclosure construction
• Specially formulated aliphatic wood glue
• Coated tough coat spray liner guard finish
• Total box volume: 1.9 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

2
List price $249.99
-40% $149.95
Notify Me

• 12" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and dado enclosure construction
• Specially formulated aliphatic wood glue
• Coated tough coat spray liner guard finish
• Total box volume: 1.9 cubic feet

Atrend 10KSV

Empty Single 10" SPL Vented Enclosure for Kicker L7R and L7S Series Subwoofers

10KSV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 10KSV

Empty Single 10" SPL Vented Enclosure for Kicker L7R and L7S Series Subwoofers

• 10" Single SPL Ported Subwoofer Enclosure
• Fits Kicker L7R and L7S series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 1.75 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

6
List price $174.99
-26% $129.99
Notify Me

• 10" Single SPL Ported Subwoofer Enclosure
• Fits Kicker L7R and L7S series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 1.75 cubic feet

Atrend 8DQV

Empty Dual 8" Vented Subwoofer Enclosure

8DQV big
Go to item page Right Arrow Icon of Right Arrow

Atrend 8DQV

Empty Dual 8" Vented Subwoofer Enclosure

• 8" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 1.13 cubic feet

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

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

13
List price $149.99
-20% $119.99

In stock

Only 1 Left!

Add to Cart

Atrend 10DVR - Red Carbon Fiber

Empty Dual 10" Vented Subwoofer Enclosure (Red)

10DVR - RED carbon fiber big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 10DVR - Red Carbon Fiber

Empty Dual 10" Vented Subwoofer Enclosure (Red)

• 10" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Premium plush black carpet finish
• Carbon fiber pattern
• Signature miter and dado construction
• Bonded using proprietary trick glue
• Total box volume: 2.82 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $284.99
-30% $199.99
Add to Cart

• 10" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Premium plush black carpet finish
• Carbon fiber pattern
• Signature miter and dado construction
• Bonded using proprietary trick glue
• Total box volume: 2.82 cubic feet

Atrend 10SVNC

Empty Single 10" Carbon Fiber Vented Enclosure for Alpine E-S-R-X Series Subwoofers

10SVNC big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 10SVNC

Empty Single 10" Carbon Fiber Vented Enclosure for Alpine E-S-R-X Series Subwoofers

• 10" Single Ported Subwoofer Enclosure
• Fits Alpine E, S, R, and X series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Features premium carbon fiber faceplate design
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 1.2 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $159.99
-31% $109.99
Notify Me

• 10" Single Ported Subwoofer Enclosure
• Fits Alpine E, S, R, and X series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Features premium carbon fiber faceplate design
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 1.2 cubic feet

Atrend 15KDV

Empty Dual 15" SPL Vented Enclosure for Kicker L7R and L7S Series Subwoofers

15KDV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 15KDV

Empty Dual 15" SPL Vented Enclosure for Kicker L7R and L7S Series Subwoofers

• 15" Dual SPL Ported Subwoofer Enclosure
• Fits Kicker L7R and L7S series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 6 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

5
List price $219.99
-32% $149.99
Notify Me

• 15" Dual SPL Ported Subwoofer Enclosure
• Fits Kicker L7R and L7S series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 6 cubic feet

Atrend 12RPD

Empty Dual 12" Vented Enclosure for Rockford Fosgate P2 and P3 Series Subwoofers

12RPD big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 12RPD

Empty Dual 12" Vented Enclosure for Rockford Fosgate P2 and P3 Series Subwoofers

• 12" Dual Ported Subwoofer Enclosure
• Fits Rockford Fosgate P2 and P3 series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3.4 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

7
List price $189.99
-32% $129.95
Notify Me

• 12" Dual Ported Subwoofer Enclosure
• Fits Rockford Fosgate P2 and P3 series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3.4 cubic feet

Atrend 12JLX3DV

Empty Dual 12" Vented Enclosure for JL Audio WX-W3 Series Subwoofers

12JLX3DV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 12JLX3DV

Empty Dual 12" Vented Enclosure for JL Audio WX-W3 Series Subwoofers

• 12" Dual Ported Subwoofer Enclosure
• Fits JL Audio WX-W3 series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium charcoal carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $239.99
-38% $149.99
Notify Me

• 12" Dual Ported Subwoofer Enclosure
• Fits JL Audio WX-W3 series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium charcoal carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3 cubic feet

Atrend 15SPLDV

Empty Dual 15" SPL Vented Subwoofer Enclosure

15SPLDV big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Atrend 15SPLDV

Empty Dual 15" SPL Vented Subwoofer Enclosure

• 15" Dual SPL Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3.8 cubic feet

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

10
List price $309.99
-24% $234.99
Notify Me

• 15" Dual SPL Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3.8 cubic feet

Prev 4 5 6 7 8 Next

Items per page: 20 40 60

    Clear all

    FAQ Frequently asked questions in Ported & Vented Subwoofer Boxes

    Ported & Vented Subwoofer Boxes Frequently Asked Questions (FAQ)
    A ported subwoofer box is a type of subwoofer enclosure that has a port or vent that allows air to flow in and out of the box. This type of enclosure is designed to produce deeper, louder bass response than a sealed subwoofer box.
    There are several benefits to using a ported subwoofer box. First, ported subwoofer boxes produce deeper, louder bass response than sealed subwoofer boxes. Second, ported subwoofer boxes can be more efficient than sealed subwoofer boxes, meaning they can produce more bass with less power. Third, ported subwoofer boxes can be more forgiving of placement than sealed subwoofer boxes.
    There are a few drawbacks to using a ported subwoofer box. First, ported subwoofer boxes can be more difficult to build and install than sealed subwoofer boxes. Second, ported subwoofer boxes can be more expensive than sealed subwoofer boxes. Third, ported subwoofer boxes can be more sensitive to changes in air temperature and humidity than sealed subwoofer boxes.
    When choosing a ported subwoofer box, you should consider the following factors: The size of your subwoofer The amount of bass you want The space you have available Your budget Your personal preferences
    Installing a ported subwoofer box is a relatively easy process. Most ported subwoofer boxes come with instructions, and the installation process should only take a few hours. Here are some additional tips for installing a ported subwoofer box: Make sure the box is secure and will not move around. Seal any gaps or openings in the box to prevent air leaks. Position the subwoofer in the box so that the cone is facing forward. Connect the subwoofer to your car stereo. Experiment with different settings to find the sound you like.
    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

    2009 BMW 528i

    2011 Bentley Continental

    1985 Subaru DL

    2003 Dodge Viper

    2012 Kia Forte

    2012 Dodge Durango

    2008 Mercury Sable

    2013 Audi S5

    1985 Ford Tempo

    2018 Ram 2500

    Vehicle
    Store     Delete

    2012 Can-Am Commander 1000

    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 2009 528i
    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