Description
OPEN BOX — MB Quart MBQJ-STG4A-1 800W Stage 4 OEM-Radio Audio Upgrade
A factory-radio-compatible Jeep front-stage upgrade from MB Quart, engineered as a coordinated four-speaker, two-amplifier system for Wrangler JL and Gladiator JT. This is the OEM-source-unit model MBQJ-STG4A-1, not the different MBQJ-STG4AH-1 version for aftermarket radios.
Manufacturer-Specified Stage 4 Kit
- Two 3.5-inch upper-dash coaxial speakers
- Two 6.5-inch front midbass drivers and application-specific lower-dash replacement enclosures
- Two 400-watt two-channel Class-D amplifiers (800-watt system rating)
- OEM-source-unit integration, vehicle-specific wiring, amplifier mounting plate and installation hardware specified by MB Quart for this model
Vehicle Application
For Jeep Wrangler JL 2018–current and Jeep Gladiator JT 2020–current using the factory source unit. Confirm trim, OEM sound system, connector and model-year integration requirements. Manufacturer notes this kit requires a compatible rear speaker kit or soundbar; the JC2-169 rear pair and MBQJL-302 tailgate subwoofer are not included in this separately priced Stage 4 offer.
Open-Box Details
Condition: OPEN BOX. One Stage 4 OEM-radio kit being separated from an open-box Stage 7 package. Exact cosmetic condition, interface parts, mounting hardware, harnesses and other loose accessories must be physically verified before sale. Equipment price excludes installation labor.
Manufacturer model: MBQJ-STG4A-1 | MOPAR part: 68729812AA
Related Open-Box MB Quart Components
These separate equipment listings were split from an MB Quart Jeep audio package. Each is priced and sold independently; adding one item does not include the others. Confirm vehicle year, factory audio equipment, actual open-box accessories and fitment before ordering.