The MB Quart MBQJ-AMP-ACC-1 is a Jeep Wrangler amp kit for 2018-current Wrangler JL and 2020-current Gladiator JT that lets you add amplifiers to power a subwoofer and/or soundbar while keeping the factory radio: a 4-channel line output converter, model-year signal harnesses, a power harness and a powder coated amplifier mount. Amplifiers are not included.
The power harness is plug-and-play with up to three MB Quart NA2/NA4 amplifiers, and the mount holds three. MB Quart uses this kit in its subwoofer and soundbar accessory packages, such as the MBQJL-302-ACC-1, MBQJT-SUB-ACC-1 and MBQJ-48CRGB-ACC-1. It is not needed with the Stage 4 systems, which carry their own amp plate and harness.
Think of it as the Jeep Wrangler amplifier installation kit: it lets an MB Quart Jeep Wrangler amp power a Jeep Wrangler subwoofer, a Jeep Gladiator subwoofer or a Jeep Wrangler sound bar. That makes it the foundation of a Jeep Wrangler audio upgrade or Jeep Gladiator audio upgrade that keeps the factory radio, with an amplifier wiring harness and line output converter in one box. MB Quart Jeep accessory packages are built on it.
Key Features
- 4-channel line output converter (LOC) to pull a signal from the factory system
- Multiple 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
- Powder coated amplifier mount for three MB Quart NA2/NA4 amplifiers
Built To Solve: Adding Amplifiers to a Factory-Radio Jeep Wrangler JL or Gladiator JT
- No clean signal source for an aftermarket amplifier on the factory radio
- Cut-and-splice power and signal wiring for a sub or soundbar
- No good place to mount up to three amplifiers
Best For: Wrangler JL and Gladiator JT Owners Adding a Subwoofer or Soundbar
- Owners keeping the factory radio who want to add an MB Quart jeep wrangler subwoofer, jeep gladiator subwoofer or soundbar
- Owners running MB Quart NA2/NA4 amplifiers (sold separately)
- Not needed with MB Quart's Stage 4 front systems
Specifications
- Line output converter: 4-channel
- Signal harnesses: 2018-2023 and 2024-current Wrangler JL / Gladiator JT
- Power harness: plug-and-play with up to three MB Quart NA2/NA4 amplifiers
- Amplifier mount: powder coated, holds three MB Quart NA2/NA4 amplifiers
- Amplifiers: not included
- Listed weight: 8.0 lbs; listed dimensions: 18 x 10 x 6 in
- Install: basic hand tools
- Color: Black; warranty: 1 year
- Manufacturer Part Number: MBQJ-AMP-ACC-1
Fitment
MB Quart lists this product for:
- Jeep® Wrangler (JL) 2018-Current
- Jeep® Gladiator (JT) 2020-Current
MB Quart publishes separate install guides for 2018-2023 and 2024-current models, plus a 2024 Wrangler JL / Gladiator JT amp plate technical service bulletin; the 2018-2023 guide is attached here.
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
Does the MBQJ-AMP-ACC-1 include an amplifier?
No. It includes a 4-channel line output converter, signal and power harnesses and an amplifier mount. The power harness is plug-and-play with up to three MB Quart NA2/NA4 amplifiers.
Which Jeeps does it fit?
MB Quart lists Jeep Wrangler (JL) 2018-Current and Jeep Gladiator (JT) 2020-Current, with signal harnesses for both 2018-2023 and 2024-current model years.
Do I need this kit with an MB Quart Stage 4 system?
No. The Stage 4 systems include their own amplifier plate and wiring. This kit is for adding amplified subwoofers or soundbars while keeping the factory radio and speakers.
How many amplifiers can it support?
Up to three MB Quart NA2/NA4 amplifiers on the power harness and powder coated mount, per MB Quart.
Is there a separate install guide for 2024 Jeeps?
Yes. MB Quart publishes 2018-2023 and 2024-current install guides and a 2024 amp plate technical service bulletin.
Will it work in a Jeep Wrangler JK?
No. MB Quart lists it for the Wrangler JL and Gladiator JT only.
Why MB Quart
MB Quart builds vehicle-tuned audio packages for the Jeep Wrangler JL and Gladiator JT, 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.
Pair This Jeep Line Output Converter Kit With the Right Amplifiers
Decide what you are powering first: a subwoofer, a soundbar or both, then choose MB Quart NA2/NA4 amplifiers to match. MB Quart's accessory packages bundle this kit with the subwoofer, soundbar and amplifier already matched. Questions? Contact Dunes 2 Dezert SXS before you buy.
