DS18 JT-S84LD Loaded Under-Seat Subwoofer Enclosure 4× 8" ZR8.2D — Jeep Gladiator JT (2020–Up) — 3600W MAX
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DS18 JT-S84LD Loaded Under-Seat Subwoofer Enclosure 4× 8" ZR8.2D — Jeep Gladiator JT (2020–Up) — 3600W MAX
Product Overview
Description
Key Features
- Loaded with four 8" DS18 ZR8.2D subwoofers — 1800W RMS / 3600W MAX at a 1-ohm final load
- Fits under the rear seat of 2020+ Jeep Gladiator models (seat raise required for install)
- Sealed enclosure crafted from ¾" MDF, finished in black leather and acrylic
- Each sub housed in its own 0.88 ft³ chamber, tuned for a deep 35–100Hz response
- Digital LED lighting for full show mode
- Trail-tested and show-floor approved
Overview
DS18's JT-S84LD is the ultimate bass upgrade for Jeep Gladiator owners who like it loud and clean. Loaded with four 8" ZR8.2D subwoofers, wrapped in black leather, and lit up with digital LED lighting, this setup turns your Jeep's back seat into a bass chamber.
All the Boom, None of the Bulk
Designed to fit under the rear seat of 2020+ Jeep Gladiator models, this sealed enclosure pumps out a whopping 1800W RMS (3600W MAX) at a 1-ohm final load. Seat raise required.
Show-Mode Ready with Digital LED
Equipped with Digital LED Lighting, the JT-S84LD also offers a visual show. Pair it with DS18's LC-DRM Bluetooth Lighting Module (sold separately) to control colors, effects, and patterns straight from your phone via the DS18 LC App.
Built to Bang, Built to Last
Crafted from ¾" MDF, finished in black leather and acrylic, and internally sealed for ultra-tight bass response, this enclosure is trail-tested and show-floor approved. Each sub is housed in a 0.88 ft³ chamber, tuned for a deep 35–100Hz response.
Please note: The digital lighting system requires the DS18 LC-DRM module (sold separately). Do not connect lighting directly to power.
Specifications
| SKU | JT-S84LD |
| Application | Jeep Gladiator JT (2020–Up), under rear seat |
| OEM Fit | Yes — seat raise required |
| Subwoofers | 4 × DS18 ZR8.2D 8" DVC |
| Power — RMS | 1800 Watts |
| Power — MAX | 3600 Watts |
| Final Impedance | 1 Ohm |
| Enclosure Type | Sealed |
| Enclosure Material | ¾" MDF |
| Chamber Volume | 0.88 ft³ per subwoofer |
| Frequency Response | 35–100 Hz |
| Finish | Black leather and acrylic |
| Lighting | Digital LED (requires LC-DRM module, sold separately) |
Price is per package.
Free shipping on orders $100+
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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FAQs
Please read our FAQs page to find out more.
RMS vs. MAX power — which number do I actually care about?
RMS is what your gear handles continuously; MAX is the short burst it can survive without complaint. Match your amplifier's RMS output to your speakers' RMS rating — sizing off the MAX number is how magic smoke gets released.
What does the IP65 rating on DS18 marine gear actually mean?
It's dust-tight and rated against low-pressure water jets from any direction — built for spray, rain, and the occasional wave over the bow, not for full submersion. If something's going somewhere it could sit underwater, that's a different conversation entirely.
How do I match an amplifier to my speakers without guessing?
Add up the RMS rating of everything the amp will power, and pick an amp whose RMS output (at your speakers' impedance — usually 4-ohm) lands close to that total. Undersized is thin sound; wildly oversized is a fast way to blow a voice coil.
Can I mix marine-grade gear into a standard car audio setup, or the reverse?
You can run marine-grade gear in a car — it's just over-built for that environment, no downside besides cost. Running non-weatherproof car audio gear in an open UTV or boat is the direction that causes problems.
What gauge wiring kit do I need?
It scales with your amp's power draw and the length of the run — DS18's OFC kits come in 4-gauge and 8-gauge for a reason. Undersized wiring on a high-draw system is a voltage-drop and heat problem waiting to happen; when in doubt, size up.