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MB Quart Stage 4 Audio System for Jeep Wrangler JL 18-23/Gladiator JT 20-26 - 422642

MB Quart Stage 4 Audio System for Jeep Wrangler JL 18-23/Gladiator JT 20-26 - 422642

$930.99
$930.99 $1,240.99
SAVE 24% Sold out
MB Quart Stage 4 Audio System for Jeep Wrangler JL 18-23/Gladiator JT 20-26 - 422642

MB Quart Stage 4 Audio System for Jeep Wrangler JL 18-23/Gladiator JT 20-26 - 422642

$930.99
$930.99 $1,240.99
SAVE 24% Sold out

MB Quart Stage 4 Audio System for Jeep Wrangler JL 18-23/Gladiator JT 20-26 - 422642

Take your Jeep’s sound system to the next level with the MB Quart MBQJ-STG4A-1 STAGE 4 Audio Upgrade Kit, engineered exclusively for Jeep Wrangler JL (2018-2023) and Gladiator JT (2020-2026). Designed to work with OEM factory radios and requiring a rear speaker kit or soundbar for complete coverage, this system delivers powerful, balanced, and precise sound performance on any road or trail.

This all-in-one kit comes with a premium 4-speaker set: 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 driven 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. Optimized crossover networks (12dB midrange / 6dB tweeter) ensure 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-STG4A-1 features durable composite mounting enclosures, a powder-coated amplifier plate, and high-quality speaker materials built to withstand demanding Jeep and truck use. Installation is quick and straightforward thanks to plug-and-play OEM harnesses and factory-specific mounting, eliminating the need for custom fabrication while ensuring a perfect fit.

With a frequency response of 75 Hz–23 kHz, sensitivity of 89 dB, and a sleek black finish that blends with Jeep interiors, this kit delivers both performance and style. Dimensions measure 22.24 x 18.34 x 10.59 inches with a total weight of 26 pounds. Backed by MB Quart’s heritage of German engineering, the STAGE 4 Jeep upgrade kit offers reliable power, premium sound quality, and long-lasting durability for your vehicle.

Features
  • Stage 4 Audio system designed for OEM Source Unit engineered for Jeep Wrangler JL (2018-2023) and Gladiator JT (2020-2026) models
  • Uses OEM 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
  • Works with OEM factory radios; requires rear speaker kit or soundbar for full coverage
  • 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: 26 pounds
What our Experts Think
  • Complete Jeep audio transformation: The MB Quart Stage 4 Audio System is engineered for 2018–2023 Jeep Wrangler JL and 2020–2026 Gladiator JT models, delivering a major upgrade over factory sound systems.
  • High-performance speaker combination: Includes 3.5" coaxial speakers with magnesium dome tweeters and 6.5" midbass drivers for clearer highs, stronger vocals, and deeper midrange impact.
  • Powerful built-in amplification: Dual 400-watt NA2 Class-D amplifiers provide efficient power delivery with 800 watts total peak output for louder, cleaner audio in demanding Jeep environments.
  • Precision sound tuning: Integrated equalization and optimized crossover networks help create a balanced full-range listening experience with improved detail and sound staging.
  • Jeep-friendly installation: Factory-style mounting enclosures and plug-and-play OEM harnesses allow a cleaner installation without extensive custom fabrication.
  • Built for open-air adventures: Rugged components and durable construction help maintain strong performance during off-road driving, top-down cruising, and everyday use.
  • Expert recommendation: An ideal choice for Jeep owners seeking a premium, high-output audio upgrade with factory-like fit, powerful amplification, and improved clarity on every trail or highway drive.

Q&A

Q: What is the MB Quart 422642 Stage 4 Audio System?
A: It is a complete Jeep audio upgrade system designed to deliver powerful, high-quality sound for Jeep Wrangler JL and Gladiator JT models with improved clarity, bass response, and volume.

Q: Which Jeep models are compatible with this Stage 4 system?
A: It is designed for Jeep Wrangler JL models from 2018-2023 and Gladiator JT models from 2020-2026.

Q: What components are included in the MB Quart 422642 kit?
A: The system includes two 3.5-inch coaxial speakers with magnesium dome tweeters, two 6.5-inch midbass drivers, and dual 400-watt Class D amplifiers for powerful full-range audio.

Q: How much power does the Stage 4 audio system produce?
A: It delivers up to 800 watts of peak power through dual 400-watt NA2 Class D amplifiers with onboard equalization for optimized sound tuning.

Q: Does this system work with the factory Jeep radio?
A: Yes. The 422642 version is designed for use with the OEM factory source unit and requires a rear speaker kit or soundbar for complete audio coverage.

Q: Will this upgrade improve factory Jeep sound quality?
A: Yes. The tuned crossover network, upgraded speakers, and dedicated amplifiers provide clearer highs, stronger mids, deeper bass, and better performance in open-air Jeep driving conditions.

Q: Is installation plug-and-play?
A: Yes. The system includes OEM-style harnesses and vehicle-specific mounting enclosures designed for factory Jeep locations without custom fabrication.

Q: What makes this system suitable for Jeep off-road use?
A: The rugged speaker materials, durable enclosures, and efficient Class D amplifiers are designed to handle demanding Jeep environments and outdoor driving conditions.

Q: Does this kit include a rear soundbar?
A: No. A compatible rear speaker kit or soundbar is required separately to complete the full Jeep audio setup.

Q: What is the frequency response of the MB Quart Stage 4 system?
A: The system provides a wide 75Hz–23kHz frequency response with 89dB sensitivity for balanced and detailed audio reproduction.

Maintenance Tips
  • Clean speakers, soundbar, and audio components regularly to remove dust, dirt, and off-road debris.
  • Protect audio components from excessive water exposure during open-top driving or harsh weather.
  • Inspect all wiring, connectors, and terminals periodically for corrosion, looseness, or damage.
  • Check amplifier settings and connections to maintain proper sound performance and prevent overload.
  • Avoid extended playback at maximum volume to reduce distortion and protect speakers.
  • Use balanced EQ and gain settings to maintain clear audio and extend component life.
  • Securely check mounting hardware after off-road trips to prevent vibration-related loosening.
  • Clean surfaces with a soft cloth and avoid harsh chemicals or abrasive materials.
  • Monitor for unusual sounds such as buzzing, rattling, or reduced output and address issues early.
  • Keep the Jeep interior and audio enclosures clean and dry for reliable long-term performance.
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