Ground Shaker GS-JPG28B Dual 8″ Sealed Sub Box — Fits 2019–2026 Jeep Gladiator
Enclosure only — subwoofers not included.
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Ground Shaker GS-JPG28B Dual 8″ Sealed Sub Box — Fits 2019–2026 Jeep Gladiator
Product Overview
Description
Built for the 2019–2026 Jeep Gladiator, this is Ground Shaker's dual 8" sealed enclosure, and it sits under the rear seat and fires upward. Sealed boxes like this favor tight, accurate bass over sheer volume. It is built from 5/8" MDF, carpeted in trunk liner, and glued and siliconed at every seam.
Key Features
- Vehicle-specific enclosure for the 2019–2026 Jeep Gladiator
- Dual 8″ sealed design — 1.02 ft³ air volume
- Mounting depth 4 1/4″
- 2 individual chambers
- 5/8″ high quality MDF wood
- Carpeted with durable trunk liner finish
- Sealed with high quality Titebond silicone
- Glued with high quality Titebond wood glue
- 2 binding post terminals
- Up firing
- Fits under rear seat
Specifications
| SKU | GS-JPG28B |
| Application | 2019–2026 Jeep Gladiator |
| Enclosure Type | Sealed |
| Woofer Size | Dual 8″ |
| Cutout Diameter | 7 1/8″ |
| Air Volume | 1.02 ft³ |
| Volume Per Subwoofer | 0.51 ft³ |
| Weight | 29 lbs |
| Mounting Depth | 4 1/4″ |
| Height | 6″ |
| Length | 43 1/2″ |
| Top Depth | 16″ |
| Bottom Depth | 13″ |
Subwoofer option
Add two DS18 SRW8.4 shallow-mount 8" subwoofers — 150W RMS / 300W MAX, SVC 4-ohm, 2.95" mounting depth, 7.12" front-mount cutout per DS18's dimension drawing — and they ship with the box, one per woofer opening. This box is cut 7 1/8″ with 4 1/4″ of mounting depth, so the SRW8.4 fits as shipped. Choose "Box only" to buy the enclosure alone.
Box-only option: subwoofers not included. Price is each.
Free shipping on orders $150+
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.