Skip to product information
1 of 10

MB Quart

MB Quart 8" Subwoofer Upgrade for 21-24 Ford Bronco, Tuned Audio Package, 400W - 427503

MB Quart 8" Subwoofer Upgrade for 21-24 Ford Bronco, Tuned Audio Package, 400W - 427503

review stars 1 Review

25% Sale

Only left!

image

Free Delivery

image

Limited Stocks

In Stock - Ready to be Shipped

Regular price $365.49 Sale price $274.99
Shipping calculated at checkout.

Quantity

View full details
SALE ENDS IN
07 HRS
23 MINS
28 SECS
DON'T MISS IT!

Popular Add on

$30.00

$22.99

$70.00

$52.99

Add-Ons Bundle

$30.00

$22.99

$70.00

$52.99

Bundle Offer

$100.00

$75.98

Recently Viewed

MB Quart 8" Subwoofer Upgrade for 21-24 Ford Bronco, Tuned Audio Package, 400W - 427503

Elevate your driving experience with the MB Quart Subwoofer Upgrade, a tuned audio package engineered exclusively for the 2021–2024 Ford Bronco equipped with the OEM B&O sound system. Designed to deliver deeper bass, cleaner response, and higher output, this system brings your Bronco’s audio performance to life with powerful low-end clarity that factory equipment simply can’t match.

At the heart of the upgrade is an 8-inch, application-specific long-throw subwoofer designed for maximum output in the Bronco’s OEM B&O enclosure. Tuned for precision and punch, it delivers a frequency response of 50Hz to 250Hz, adding fullness and tight, accurate bass to your music. With a sensitivity of 89 dB and a 2-ohm impedance, it efficiently converts power into impactful sound, ideal for everything from rock and country to hip-hop and electronic.

Powering this performance is a compact yet robust 400-watt Class-D NA2 amplifier. Engineered for high efficiency and low current draw, it provides clean, controlled power with onboard equalization to ensure the subwoofer performs at its peak. Despite its impressive output, the amp’s small chassis is easy to mount and integrates seamlessly into the vehicle. A powder-coated mounting plate ensures secure placement and long-term durability, even in rugged off-road environments.

Installation is designed to be straightforward: the system uses the Bronco’s OEM B&O subwoofer enclosure, existing hardware, and a dedicated subwoofer-to-amplifier harness. With basic hand tools, the upgrade can be completed cleanly without vehicle modification.

Whether you're cruising the highway or hitting the trails, the MB Quart 8" Subwoofer Upgrade delivers a richer, more immersive listening experience, transforming your Bronco’s audio system into the powerful, full-bodied sound package it was meant to be.

Features
  • Designed for 2021–2024 Ford Bronco models with the OEM B&O system, using the factory subwoofer enclosure and hardware for a seamless upgrade
  • 8" long-throw sub delivers tight, powerful bass with a 50–250Hz frequency range, 89 dB sensitivity, and 2-ohm wiring for efficient performance
  • Compact 400W Class-D amplifier provides clean, efficient power with onboard EQ, low current draw, and a small chassis that fits easily
  • Includes a dedicated subwoofer-to-amplifier harness and mounts using OEM locations; requires only basic hand tools for a clean, no-mod setup
  • Amplifier secures to a powder-coated mounting plate for long-lasting stability, even during rugged driving or off-road use
  • This system upgrades the OEM B&O audio subwoofer and requires the OEM 8" subwoofer enclosure. Plug & Play with any of the MB Quart STAGE 6 Ford Bronco Tuned Audio Systems. Additional parts needed if not pairing with an MB Quart Tuned Audio System please consult professional installer.
  • Color: black
  • Dimensions (L x W x H): 12.25 x 12.25 x 11.38 inches
  • Weight: 10.6 pounds
What our Experts Think
  • Vehicle-specific 8-inch subwoofer upgrade designed for 2021-2024 Ford Bronco models.
  • 400W power handling delivers deep, powerful bass with improved low-frequency impact.
  • Tuned audio package provides optimized sound performance with cleaner and more balanced bass response.
  • Compact design adds premium bass performance while maintaining valuable interior space.
  • Enhanced factory audio experience brings more depth and excitement to your favorite music.
  • Built for Bronco adventures with durable construction suited for daily driving and off-road conditions.
  • Easy integration makes it a smart upgrade for Bronco owners seeking stronger bass without a full custom build.
  • Ideal for music enthusiasts who want a richer, more immersive in-vehicle listening experience.
Q&A

Q: What Ford Bronco models is this subwoofer upgrade compatible with?
A: It is designed for 2021–2024 Ford Bronco models equipped with the OEM B&O audio system for a direct factory-style upgrade.

Q: What power output does this subwoofer system provide?
A: The system delivers 400 watts of power through a compact Class-D amplifier for stronger, cleaner bass performance.

Q: What size subwoofer is included?
A: It features an 8-inch long-throw subwoofer engineered to provide deeper bass, improved low-frequency response, and higher output.

Q: Does it use the factory Bronco enclosure?
A: Yes. The upgrade is designed to use the OEM B&O subwoofer enclosure and mounting locations for a clean, space-saving installation.

Q: Is installation plug-and-play?
A: Yes. It includes a dedicated subwoofer-to-amplifier harness and installs with factory hardware locations. It is plug-and-play with compatible MB Quart Bronco tuned audio systems; additional parts may be needed for other setups.

Q: What sound improvement can I expect?
A: The MB Quart 427503 upgrade delivers deeper bass, improved clarity, and a more immersive listening experience compared with the factory subwoofer.

Maintenance Tips
  • Clean the subwoofer enclosure and grille with a soft microfiber cloth to prevent dust buildup.
  • Inspect wiring, connectors, and mounting hardware regularly for secure connections.
  • Avoid excessive volume levels or distortion to protect the subwoofer and amplifier.
  • Keep the audio components dry and avoid direct exposure to water or high-pressure sprays.
  • Check for loose parts or debris after off-road driving or heavy vehicle use.
  • Protect the system from extreme heat and prolonged sun exposure when possible.