Take your Jeep’s sound system to the next level with the MB Quart MBQJ-STG4AH-1 STAGE 4 Audio Upgrade Kit, engineered exclusively for Jeep Wrangler JL (2018-2026) and Gladiator JT (2020-2026). Designed for aftermarket radios and requiring a rear speaker kit or soundbar for full coverage, this complete upgrade delivers powerful, balanced, and precise sound performance on any road or trail.
This all-in-one kit includes a 4-speaker set with premium components: two 3.5-inch coaxial speakers with 0.75-inch magnesium dome tweeters for crisp highs, and two 6.5-inch midbass drivers with polypropylene/mica blend cones for strong midrange response. The system is powered by dual 400-watt NA2 Class-D compact amplifiers with on-board equalization, producing 800 watts of peak output in a high-efficiency, compact design. With optimized crossover networks (12dB midrange / 6dB tweeter), every detail is tuned for clarity, depth, and full-range audio that cuts through road noise and outdoor conditions.
Built for rugged environments, the MBQJ-STG4AH-1 features durable composite mounting enclosures, a powder-coated amplifier plate, and high-quality speaker materials designed to withstand demanding Jeep and truck use. Installation is fast and simple thanks to plug-and-play OEM harnesses and factory-specific mounting, eliminating the need for custom fabrication while ensuring a seamless fit in factory locations.
With a frequency response of 75 Hz–23 kHz, sensitivity of 89 dB, and a black finish that blends with Jeep interiors, this kit provides both performance and style. Dimensions measure 22.24 x 18.34 x 10.59 inches with a total weight of 25 pounds. Backed by MB Quart’s heritage of German engineering, the STAGE 4 Jeep upgrade kit delivers reliable power, premium sound quality, and long-lasting durability for your vehicle.
- Stage 4 audio system designed for aftermarket source systems for Jeep Wrangler JL 2018-2026 and Gladiator JT 2020-2026
- Requires aftermarket source unit, and requires rear speaker kit or soundbar
- Includes (2) 3.5-inch coaxial speakers with 0.75-inch magnesium dome tweeters and (2) 6.5-inch midbass drivers with polypropylene/mica blend cones
- Includes dual 400-watt NA2 Class-D compact amplifiers engineered for high efficiency and reliable performance
- On-board equalization provides balanced sound tuning with 800 watts total peak output
- Plug-and-play OEM harnesses and composite mounting enclosures for factory Jeep locations with no custom fabrication required
- Optimized crossover network (12dB midrange / 6dB tweeter) delivers clear highs, strong midrange detail and balanced full range sound
- Rugged construction with high-quality cones, tweeters, and enclosures built to withstand demanding driving conditions
- Frequency response: 75 Hz – 23 kHz
- Sensitivity level: 89 dB
- Material: Metal, Plastic
- Color: Black
- Dimensions (L x W x H): 22.24 x 18.34 x 10.59 inches
- Weight: 25 pounds
- Manufacture warranty: 1-year warrant
Questions? We’ve Got Answers.
Helpful answers about product features, setup, and more
What is the system constructed from?
The system is constructed from plastic. The construction is built to handle exposure to outdoor conditions including sun and moisture. This material choice supports everyday use while maintaining the structural integrity needed for the product’s intended applications.
What are the dimensions of the system?
The system measures 22.24 x 18.34 x 10.59 inches (length x width x height). Use these measurements to confirm the product fits your intended setup before ordering.
Is the system designed for outdoor use?
Yes. The system is built for outdoor environments such as patios, decks, yards, and gardens. Position it where it will see regular use but remains accessible for the items it stores or supports.
How do I clean and care for the system?
Wipe with a damp cloth and mild detergent. Avoid harsh solvents that can dull or crack the surface. Regular light cleaning extends the lifespan of the system and keeps it looking and performing well over time.
Who makes the system?
The system is made by MB Quart. MB Quart produces this item as part of its lineup, and product details such as specifications, included accessories, and warranty terms are set by the brand.
How much does the system weigh?
The system weighs approximately 25 pounds. Use this figure when planning transport, handling, or placement of the item.
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