Ground Shaker GS-F250L7T312B Triple 12″ Sealed L7T Sub Box — Fits 99–07 Ford F-250 Crew Cab
Enclosure only — subwoofers not included.
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Ground Shaker GS-F250L7T312B Triple 12″ Sealed L7T Sub Box — Fits 99–07 Ford F-250 Crew Cab
Product Overview
Description
This Ground Shaker triple 12" sealed enclosure is cut for the 99–07 Ford F-250 Crew Cab; it sits behind the rear seat and fires forward. A sealed design keeps the bass controlled and musical, and it puts three 12" subs where the factory left dead space. The cutout is made for the specific woofer line named in the title, so match your sub model before ordering.
Key Features
- Vehicle-specific fit for 1999–2007 Ford F-250 Crew Cab — mounts behind the rear seat, forward firing
- Triple sealed design with 3 individual chambers — 0.43 ft³ per subwoofer, 1.30 ft³ total
- Built for square Kicker L7T 12″ subwoofers only
- ⅝″ high-quality MDF construction, carpeted with a durable trunk-liner finish
- Sealed with high-quality Titebond silicone and glued with Titebond wood glue
- 1 binding post terminal
- Removal of plastic tray and rear wall carpet required; will not fit models with rear power window
Specifications
| SKU | GS-F250L7T312B |
| Application | 1999–2007 Ford F-250 Crew Cab |
| Woofer Size | Triple 12″ (for L7T subwoofers only) |
| Cutout Diameter | 11⅛″ |
| Air Volume | 1.30 ft³ total — 3 individual chambers, 0.43 ft³ per subwoofer |
| Mounting Depth | 5″ |
| Enclosure Type | Sealed |
| Firing Direction | Forward |
| Install Location | Behind rear seat (removal of plastic tray and rear wall carpet required) |
| Height | 15¼″ |
| Length | 48¼″ |
| Top Depth | 4″ |
| Bottom Depth | 6″ |
| Construction | ⅝″ high-quality MDF, carpeted trunk-liner finish, Titebond silicone seal, Titebond wood glue |
| Terminals | 1 binding post terminal |
| Weight | 34 lbs |
| Color | Black |
| Fitment Note | Will not fit models with rear power window |
"L7T" refers to Kicker's square-woofer form factor; this is a Ground Shaker enclosure, not a Kicker® product.
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
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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.