Ford Bronco Car Subwoofer Upgrade | MB Quart MBQBRO-SUBR-1

MB Quart MBQBRO-SUBR-1 Ford Bronco Car Subwoofer Upgrade

Upgrading a factory audio system often starts with improving bass response. The MB Quart MBQBRO-SUBR-1 is a vehicle-specific car subwoofer upgrade package engineered for 2021–2024 Ford Broncos equipped with the factory Bang & Olufsen sound system. This kit combines a powerful 8-inch shallow-mount subwoofer with a dedicated 400-watt mono amplifier to deliver stronger low-frequency output without sacrificing valuable cargo space.

Designed to replace the factory subwoofer and amplifier, this solution provides deep bass performance while keeping the installation clean and integrated. Whether you listen to rock, hip-hop, or electronic music, the added low-end clarity dramatically improves the overall listening experience.

Purpose-Built Bass Upgrade for Ford Bronco

Unlike generic audio components, this system is engineered specifically for the Ford Bronco platform. The included subwoofer mounts directly into the factory enclosure location behind the passenger-side rear panel. While minor cutting and drilling are required, the final result maintains a factory appearance with a noticeable improvement in bass impact.

This setup avoids the need for a trunk-mounted subwoofer, under-seat subwoofer, or bulky preloaded subwoofer enclosure. Instead, it delivers high-impact bass using the vehicle’s original design layout.

8-Inch Shallow-Mount Subwoofer Design

At the heart of this package is an 8-inch shallow-mount subwoofer optimized for tight factory spaces. The subwoofer is wired for a 2-ohm load, allowing the amplifier to deliver maximum output efficiently.

Subwoofer specifications include:

• Frequency response: 50–250 Hz

• Sensitivity: 89 dB

• Long-throw design for controlled cone movement

• Optimized for sealed subwoofer enclosure performance

This design provides a clean bass response without overpowering the rest of the audio system. The controlled output works well in sealed and compact enclosures where space is limited.

NA2-400.1 Mono Amplifier Performance

Powering the system is the MB Quart NA2-400.1 Class-D mono amplifier. This amplifier delivers up to 400 watts RMS at 2 ohms, providing the necessary headroom for strong bass output without distortion.

Amplifier highlights include:

• 400W RMS @ 2 ohms

• 200W RMS @ 4 ohms

• Subsonic and low-pass filters

• Adjustable input sensitivity

• Efficient Class-D topology

The amplifier features conformal-coated circuit boards for improved resistance to moisture and corrosion. This makes it well-suited for daily driving and changing weather conditions.

Advanced Signal Control and Tuning

This car subwoofer system includes onboard crossover controls that allow precise tuning. The adjustable low-pass filter ranges from 50 Hz to 300 Hz, ensuring smooth integration with factory speakers. The subsonic filter protects the subwoofer from ultra-low frequencies that can cause distortion or damage.

A wired remote level control is also included. This allows quick bass adjustments from the driver’s seat, making it easy to fine-tune output depending on music style or listening preferences.

Installation and Vehicle Compatibility

The MBQBRO-SUBR-1 is designed for:

• 2021–2024 Ford Bronco

• Factory Bang & Olufsen audio system

• Installed MB Quart Stage 6 Audio System (sold separately)

The amplifier mounts using a pre-attached plate that aligns with the factory amplifier location. Wiring harnesses are included for streamlined connections when paired with the Stage 6 system.

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Clean Integration Without Bulky Enclosures

Many drivers avoid ported subwoofer boxes or oversized enclosures due to space limitations. This system eliminates that concern by using the factory mounting location. It delivers controlled bass without the drawbacks of large trunk installations or loose equipment.

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What’s Included in the Box

• NA2-400.1 mono amplifier with mounting plate

• 8" shallow-mount subwoofer

• Subwoofer mounting ring

• Power and ground wiring with fuse

• RCA cables and Y-adapters

• Remote bass level control

• Installation hardware

• Quick start guide

Warranty Coverage

• 1-Year Manufacturer Warranty

Frequently Asked Questions

Is this car subwoofer kit compatible with all Ford Broncos?

This car subwoofer system is designed for 2021–2024 Ford Broncos equipped with the factory Bang & Olufsen audio system and an installed MB Quart Stage 6 system.

Does this woofer replace the factory subwoofer?

Yes, this car subwoofer and amplifier replace the factory B&O subwoofer and amp while using the original mounting location.

Will this car subwoofer provide strong bass without distortion?

Yes, the combination of a shallow-mount subwoofer and a dedicated 400-watt amplifier delivers controlled, high-impact bass with clean output.