Description
MB Quart MBQJ-STG4AH-1 Stage 4 Jeep Audio System
The MB Quart MBQJ-STG4AH-1 is a complete Stage 4 vehicle-specific audio upgrade delivering 800 watts of total system power. Designed specifically for Jeep Wrangler (JL) and Gladiator (JT) platforms, this kit includes a matched combination of speakers and dual amplifiers for a fully integrated performance upgrade when paired with an aftermarket source unit.
System Highlights
- 800-watt total system power from dual 400W Class-D amplifiers
- Includes two 3.5" coaxial speakers and two 6.5" midbass drivers
- Compact NA2 amplifiers with integrated equalization
- Wide frequency response from 75Hz to 23kHz
- Vehicle-specific tuning for Jeep Wrangler (JL) and Gladiator (JT)
Speaker & Acoustic Design
The system utilizes 0.75-inch titanium dome tweeters paired with a crossover network featuring 12dB midrange and 6dB tweeter slopes. This configuration supports balanced output across the frequency range while maintaining clarity and efficiency with a sensitivity rating of 89dB.
The included midbass drivers and coaxial speakers are engineered to work together as a system, delivering consistent output across low and high frequencies.
Amplification & Power
Two high-efficiency 400-watt Class-D NA2 amplifiers power the system, providing a combined 800 watts of output. These compact amplifiers include onboard equalization to help optimize performance within the vehicle environment.
Installation & Compatibility
This kit is designed for straightforward installation using vehicle-specific wiring and harnesses for a plug-and-play, OEM-style fit. Basic hand tools are required for installation.
- Compatible with Jeep Wrangler (JL) 2018–Current
- Compatible with Jeep Gladiator (JT) 2020–Current
- Requires aftermarket source unit
- Requires rear speaker kit or soundbar
Specifications
| Product Type | Vehicle Kit |
| Brand | MB Quart |
| Model | MBQJ-STG4AH-1 |
| Total System Power | 800 Watts |
| Amplifiers | 2 x 400W Class-D |
| Frequency Response | 75Hz – 23kHz |
| Sensitivity | 89 dB |
| Color | Black |
| Condition | New |
| Warranty | 1 Year |