The MB Quart MBQJT-SUBA-1 is a Jeep Gladiator subwoofer system for 2020-current Gladiator JT: two 8 inch long-throw subwoofers in a rear underseat HDPE subwoofer enclosure, powered by a 400 watt Class D amplifier, installed with OEM hardware. MB Quart says it keeps full access to the jack and needs no floormat modification.
This is the powered version: the 400 watt amplifier mounts to the amp plate included with MB Quart's MBQJ-STG4A-1 and MBQJ-STG4AH-1 Stage 4 systems, which also supply the wiring harness. If you are keeping the factory front speakers, MB Quart's MBQJT-SUB-ACC-1 package pairs this sub with its line output converter kit instead.
As a Jeep Gladiator under seat subwoofer, this Jeep subwoofer system and its Jeep Gladiator subwoofer box keeps the bed and cab free. It is the bass piece of a Jeep Gladiator sound system and a Jeep Gladiator audio upgrade, and a natural Jeep Gladiator stereo upgrade, using dual 8 inch subwoofers from MB Quart. MB Quart Jeep Gladiator packages build on this same underseat sub.
Key Features
- Two 8 inch application-specific long-throw subwoofers rated at 200W RMS
- Rear underseat subwoofer enclosure of high quality HDPE with a molded-in center support structure
- 1.0 cubic feet of internal airspace
- Uses OEM hardware, keeps full access to the jack and needs no floormat modification
- 400 watt high efficiency Class D amplifier (compact NA2 with on-board equalization)
Built To Solve: No Low-End Bass in the Jeep Gladiator JT
- Factory audio that lacks low bass, especially with the top off
- No obvious place for a sub box without losing cab or bed space
- Wanting a subwoofer that leaves the jack accessible and the floormats unmodified
Best For: Gladiator JT Owners Adding Underseat Bass
- Gladiator owners running, or adding, an MB Quart Stage 4 front system
- Owners who want the amplifier included
- Gladiator JT only; for the Wrangler JL, MB Quart sells the MBQJL-302 tailgate sub and the MBQJL-SUBR-1
Specifications
- Subwoofers: two 8 inch long-throw, 200W RMS each, frequency response 50Hz to 250Hz, sensitivity 89dB (MB Quart's kit list calls them 8 ohm subwoofers; its feature list gives a 4 ohm impedance)
- Enclosure: rear underseat, HDPE with molded-in center support, 1.0 cubic feet internal airspace
- Amplifier: 400 watt high efficiency Class D; mounts to the amp plate included with MBQJ-STG4A-1 and MBQJ-STG4AH-1
- Harness: wiring harness included with MBQJ-STG4A-1 and MBQJ-STG4AH-1
- Total system power: 400 watts
- Listed weight: 27.0 lbs; listed dimensions: 48.0 x 10.0 x 9.0 in
- Install: basic hand tools, uses OEM hardware
- Color: Black; warranty: 1 year
- MOPAR Part Number: 68727430AA
- Manufacturer Part Number: MBQJT-SUBA-1
Fitment
MB Quart lists this product for:
- Jeep® Gladiator (JT) 2020-Current
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
Does the MBQJT-SUBA-1 include an amplifier?
Yes. It includes a 400 watt Class D amplifier that mounts to the amp plate included with MB Quart's Stage 4 systems.
Where does the subwoofer mount in the Gladiator?
Under the rear seat. MB Quart says it uses OEM hardware, keeps full access to the jack and needs no floormat modification.
Which Gladiator years fit?
MB Quart lists Jeep Gladiator (JT) 2020-Current, covering both the 2020-2023 and 2024-current model years.
Is wiring included?
MB Quart lists the wiring harness as included with the MBQJ-STG4A-1 and MBQJ-STG4AH-1 Stage 4 systems. For a factory-speaker install, its MBQJT-SUB-ACC-1 package adds the MBQJ-AMP-ACC-1 line output converter kit.
What are the subwoofer specs?
Two 8 inch long-throw subwoofers rated at 200W RMS, 50Hz to 250Hz, 89dB sensitivity, in a 1.0 cubic foot HDPE enclosure, per MB Quart.
Will this fit a Jeep Wrangler JL?
No. It is designed for the Gladiator JT. For the Wrangler JL, MB Quart offers the MBQJL-302 tailgate subwoofer and the MBQJL-SUBR-1 OEM subwoofer upgrade.
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 Subwoofer Setup
Plan the power and wiring first. This sub plugs into an MB Quart Stage 4 front system's amp plate and harness, or choose the MBQJT-SUB-ACC-1 package if you are keeping the factory speakers. MB Quart's Stage 8 and Stage 10 Gladiator packages bundle this underseat sub with front and rear speakers. Questions? Contact Dunes 2 Dezert SXS before you buy.
