MB Quart Stage 4 Audio System for Jeep Wrangler JL 18-26/Gladiator JT 20-26 - 422643

MB Quart Stage 4 Audio System for Jeep Wrangler JL 18-26/Gladiator JT 20-26 - 422643

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.

Features

• 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
  

What our Experts Think

• Complete Stage 4 system – A comprehensive audio upgrade engineered specifically for Jeep Wrangler JL (2018–2026) and Gladiator JT (2020–2026).
• Premium sound performance – Delivers powerful bass, detailed mids, and crisp highs for a rich, immersive listening experience.
• Vehicle-specific integration – Custom-fit components and plug-and-play wiring provide a clean OEM-style installation.
• Built for rugged conditions – Durable, high-quality components are designed to perform reliably on and off the road.
• Upgrade with confidence – An ideal choice for Jeep owners seeking premium audio, seamless fitment, and long-lasting performance.

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