This MB Quart STAGE 4 system upgrades the factory audio in Jeep Wrangler (JL) 2018-current and Gladiator (JT) 2020-current models that keep their original radio. The kit pairs two 3.5-inch coaxial speakers and two 6.5-inch midbass drivers with two 400-watt Class-D amplifiers, delivering 800 watts total through vehicle-specific wiring and an AAMPRO plug-and-play interface.

The composite speaker enclosures drop into the factory locations and include an integrated mounting point for the OEM module, while the powder-coated amplifier plate keeps the install tidy. The 0.75-inch titanium dome tweeters, 12dB/6dB crossover, and 75Hz–23kHz frequency response are tuned to work with the stock source unit, so you get a clean, powerful upgrade without replacing the radio.