The MB Quart MBQJT-STG8-1 is a 1200 watt Jeep Gladiator speaker upgrade package for the 2020-2023 Gladiator JT: it combines MB Quart's MBQJ-STG4A-1 Stage 4 front speakers and two 400 watt amplifiers with dual 8 inch underseat subwoofers with a 400 watt amplifier and 6x9 inch rear soundbar speakers, all running from the factory radio. MB Quart describes it as plug-and-play installation using OEM harnesses.
MB Quart bundles 3 products in this package: MBQJ-STG4A-1, MBQJT-SUBA-1, JC1-169SB. Buying them together gets a matched front, bass and rear system in one order.
As a Jeep Gladiator speaker upgrade, it covers the front, the bass and the rear: Jeep Gladiator speakers up front, a Jeep Gladiator under seat subwoofer pair for bass (the MBQJT-SUBA-1 Jeep Gladiator subwoofer system), and 6x9 Jeep speakers in the rear soundbar. It is a complete Jeep Gladiator sound system, Jeep Gladiator stereo upgrade and Jeep Gladiator audio upgrade in one order. The MB Quart Jeep Gladiator Stage 8 is a full Jeep sound system rated at 1200 watt total system power.
Key Features
- Two 3.5 inch coaxial dash speakers with 0.75 inch dome tweeters
- Two 6.5 inch midbass drivers with lightweight pop paper cones in a mica blend
- Composite front speaker enclosures that drop in as a direct replacement for the factory enclosures, with an integrated OEM module mounting location
- Two 400 watt full range, two channel Class D amplifiers (compact NA2 amplifiers with on-board equalization) on a powder coated mounting plate
- AAMPRO plug and play interface so the system runs from the factory source unit
- Two 8 inch long-throw subwoofers rated at 200W RMS in a rear underseat HDPE enclosure with a molded-in center support and 1.0 cubic feet of internal airspace
- 400 watt high efficiency Class D subwoofer amplifier
- Two 6x9 inch rear coaxial speakers with 1 inch magnesium dome tweeters and removable phase lenses, behind an OEM-match replacement grill
Built To Solve: A Weak Factory Sound System in the Jeep Gladiator JT
- Factory front speakers and amplification that distort or fade with the top and doors off
- Little or no low-end bass from the stock system
- Weak rear sound for passengers
- Piecing together speakers, amps and wiring that were not designed for each other
Best For: 2020-2023 Gladiator JT Owners Who Want a Complete MB Quart System on the Factory Radio
- Owners keeping the factory radio who want a full front, bass and rear upgrade in one package
- Only the model years listed in Fitment; the MBQJT-STG8-24+ covers the other model years
Specifications
- Package contents (per MB Quart): MBQJ-STG4A-1 800 watt Stage 4 front system for the factory radio (two 3.5 inch dash coaxials, two 6.5 inch midbass drivers, composite front enclosures, two 400 watt amplifiers, AAMPRO interface); MBQJT-SUBA-1 dual 8 inch underseat subwoofer system with 400 watt amplifier; JC1-169SB 6x9 inch rear soundbar speakers
- Front speakers: crossover 12dB midrange / 6dB tweeter, frequency response 75Hz to 23kHz, sensitivity 89dB, 300W max / 150W RMS
- Front amplifiers: two 400 watt full range, two channel Class D
- Subwoofers: two 8 inch, frequency response 50Hz to 250Hz, sensitivity 89dB, 200W RMS each (MB Quart's kit list calls them 8 ohm subwoofers; its feature list gives a 4 ohm impedance)
- Subwoofer enclosure: rear underseat, HDPE, 1.0 cubic feet
- Subwoofer amplifier: 400 watt Class D
- Rear speakers: two 6x9 inch coaxial, 6dB high-pass, frequency response 45Hz to 23kHz, sensitivity 86dB, 220W max / 110W RMS
- Total system power: 1200 watts
- Source unit: uses the OEM source unit
- Install: basic hand tools
- Color: Black; warranty: 1 year
- Manufacturer Part Number: MBQJT-STG8-1
Fitment
MB Quart lists this product for:
- Jeep® Gladiator (JT) 2020-2023
This is a Jeep (on-road vehicle) audio product, not a UTV part. Confirm your model, model year and factory audio equipment against MB Quart's listing before ordering; fitment is not guaranteed on applications not listed.
FAQ
What is included in the MB Quart MBQJT-STG8-1?
MB Quart lists MBQJ-STG4A-1 800 watt Stage 4 front system for the factory radio (two 3.5 inch dash coaxials, two 6.5 inch midbass drivers, composite front enclosures, two 400 watt amplifiers, AAMPRO interface); MBQJT-SUBA-1 dual 8 inch underseat subwoofer system with 400 watt amplifier; JC1-169SB 6x9 inch rear soundbar speakers.
Which Jeeps does this package fit?
MB Quart lists Jeep® Gladiator (JT) 2020-2023. For the other model years, MB Quart sells the MBQJT-STG8-24+.
Does it work with the factory radio?
Yes. MB Quart says the package uses the OEM source unit; the MBQJ-STG4A-1 front system includes an AAMPRO plug and play interface for the factory radio.
Where do the subwoofers mount in the Gladiator?
Under the rear seat. MB Quart says the MBQJT-SUBA-1 uses OEM hardware, keeps full access to the jack and needs no floormat modification.
How does the MBQJT-STG8-1 compare with the MBQJT-SGT10-1?
This package uses 6x9 inch rear soundbar speakers; the MBQJT-SGT10-1 swaps that for an RGB rear soundbar.
How hard is the install?
MB Quart lists basic hand tools and plug-and-play installation using OEM harnesses. Follow the install manuals for each component.
Why MB Quart
MB Quart builds vehicle-tuned audio packages for the Jeep Gladiator JT, engineered around the factory mounting locations and wiring so the upgrade installs with basic hand tools instead of custom fabrication. MB Quart sells its Jeep kits in stages, so you can start with one piece and add matching speakers, subwoofers or a soundbar later.
Complete Your Jeep Gladiator JT Stage System
Before ordering this Jeep Gladiator JT package, confirm your model year on the Fitment list. MB Quart sells a separate version for the other model years (MBQJT-STG8-24+), so order the one that matches your Jeep. The package covers the front, bass and rear and runs from the factory radio. Questions about fitment? Contact Dunes 2 Dezert SXS before you buy.
