This MB Quart tuned system drops two 8-inch long-throw subwoofers into a rear underseat HDPE enclosure with 1.0 cubic feet of internal airspace, driven by a compact 400-watt Class-D amplifier with on-board equalization. Each subwoofer handles 200W RMS with a 50Hz to 250Hz frequency response, 89dB sensitivity and 4-ohm impedance.

Built for the Jeep Gladiator JT from 2020 to current, it installs with OEM hardware and basic hand tools, keeps full access to the jack and top panels, and needs no floormat modification. The amplifier mounts to the amp plate and uses the wiring harness included with the MBQJ-STG4A-1 and MBQJ-STG4AH-1 packages.