The MB Quart MBQJL-SUBR-ACC-1 is a 400 watt Jeep JL subwoofer upgrade package for the 2018-current Wrangler JL with the factory premium subwoofer: it adds a 10 inch OEM subwoofer upgrade with a 400 watt amplifier to the factory radio and speakers through MB Quart's MBQJ-AMP-ACC-1 line output converter kit. MB Quart describes it as plug-and-play installation using OEM harnesses.
MB Quart bundles 2 products in this package: MBQJ-AMP-ACC-1, MBQJL-SUBR-1. It is built for owners who want more output and bass without replacing the factory head unit or front speakers. Because the subwoofer reuses the factory premium subwoofer enclosure, this version only applies to Wranglers that have it; otherwise choose the MBQJL-302-ACC-1.
As a Jeep JL subwoofer upgrade package, it upgrades the factory sub without changing the radio. The MBQJL-SUBR-1 is a Jeep JL subwoofer and Jeep Wrangler JL subwoofer upgrade, an OEM subwoofer upgrade that is also a Jeep Wrangler subwoofer upgrade, so this Jeep subwoofer package is a Jeep JL audio upgrade and Jeep Wrangler subwoofer improvement at 400 watt total system power.
Key Features
- 4-channel line output converter (LOC) with signal harnesses for 2018-2023 and 2024-current Wrangler JL / Gladiator JT
- Power harness that is plug-and-play with up to three MB Quart NA2/NA4 amplifiers, plus a powder coated mount for three amplifiers
- 10 inch long-throw, high output subwoofer wired at 2 ohm that installs in the factory premium audio subwoofer enclosure and location
- 400 watt high efficiency Class D subwoofer amplifier
Built To Solve: Missing Bass and Rear Output on the Factory Radio in the Jeep Wrangler JL
- Factory audio that lacks bass
- No clean way to add amplifiers to the factory radio
- Cut-and-splice wiring for aftermarket amplifiers
- Wanting to keep the factory head unit and screen
Best For: 2018-current Wrangler JL Owners Keeping the Factory Radio and Speakers
- Owners who want to add a 10 inch OEM subwoofer upgrade without replacing the factory radio
- Only Wranglers with the OEM premium audio subwoofer enclosure
Specifications
- Package contents (per MB Quart): MBQJ-AMP-ACC-1 line output converter kit (4-channel LOC, signal and power harnesses, three-amp mount); MBQJL-SUBR-1 10 inch OEM subwoofer upgrade with 400 watt amplifier
- Line output converter: 4-channel, with signal harnesses for 2018-2023 and 2024-current model years
- Amplifier mount and power harness: up to three MB Quart NA2/NA4 amplifiers
- Subwoofer: 10 inch, 2 ohm, frequency response 20Hz to 250Hz, sensitivity 87dB
- Subwoofer amplifier: 400 watt Class D
- Mounting: uses the OEM premium audio subwoofer enclosure and location
- Total system power: 400 watts
- Designed to add amplified speakers or bass while keeping the factory radio and speakers, via the line output converter
- Install: basic hand tools
- Color: Black; warranty: 1 year
- Manufacturer Part Number: MBQJL-SUBR-ACC-1
Fitment
MB Quart lists this product for:
- Jeep® Wrangler (JL) 2018-Current (with the OEM premium audio subwoofer enclosure)
Requires the OEM premium audio subwoofer enclosure.
This is a Jeep (on-road vehicle) audio product, not a UTV part. Confirm your model, model year and factory audio equipment against MB Quart's listing before ordering; fitment is not guaranteed on applications not listed.
FAQ
What is included in the MB Quart MBQJL-SUBR-ACC-1?
MB Quart lists MBQJ-AMP-ACC-1 line output converter kit (4-channel LOC, signal and power harnesses, three-amp mount); MBQJL-SUBR-1 10 inch OEM subwoofer upgrade with 400 watt amplifier.
Which Jeeps does this package fit?
MB Quart lists Jeep® Wrangler (JL) 2018-Current (with the OEM premium audio subwoofer enclosure).
Does it work with the factory radio?
Yes. The MBQJ-AMP-ACC-1 line output converter kit takes the signal from the factory system and includes a power harness that is plug-and-play with up to three MB Quart NA2/NA4 amplifiers.
Does my Wrangler need the factory subwoofer for this package?
Yes. The MBQJL-SUBR-1 subwoofer installs in the OEM premium audio subwoofer enclosure and location. Without that enclosure, MB Quart's MBQJL-302-ACC-1 uses the MBQJL-302 tailgate subwoofer instead.
How does the MBQJL-SUBR-ACC-1 compare with the MBQJL-SSUBR-ACC-1?
The MBQJL-SSUBR-ACC-1 is the related MB Quart accessory package with a different mix of soundbar and subwoofer. MB Quart's Stage packages instead replace the front speakers too, using the MBQJ-STG4A-1.
How hard is the install?
MB Quart lists basic hand tools and plug-and-play installation using OEM harnesses. Follow the install manuals for each component.
Why MB Quart
MB Quart builds vehicle-tuned audio packages for the Jeep Wrangler JL, engineered around the factory mounting locations and wiring so the upgrade installs with basic hand tools instead of custom fabrication. MB Quart sells its Jeep kits in stages, so you can start with one piece and add matching speakers, subwoofers or a soundbar later.
Complete Your Jeep Wrangler JL Audio Package
Before ordering this Jeep Wrangler JL package, confirm your model year on the Fitment list and that your Wrangler has the factory premium subwoofer enclosure. The amplification and line output converter kit are part of the package, so the factory radio stays in place. Questions about fitment? Contact Dunes 2 Dezert SXS before you buy.
