Ground Shaker GS-RF350P28B Black Dual 8" Ported Subwoofer Enclosure — Fits 08–16 Ford F-350 Crew Cab
Enclosure only — subwoofers not included.
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Ground Shaker GS-RF350P28B Black Dual 8" Ported Subwoofer Enclosure — Fits 08–16 Ford F-350 Crew Cab
Product Overview
Description
Here is Ground Shaker's dual 8" ported enclosure for the 08–16 Ford F-350 Crew Cab; it sits behind the rear seat and fires forward. The slot port tuned to 32 Hz gives two 8" subs noticeably more low-end punch than a sealed box of the same footprint with 1.35 cubic feet of air volume.
Key Features
- Vehicle-specific design for the 2008–2016 Ford F-350 Crew Cab — fits behind the rear seat
- Dual 8" ported enclosure with 1.35 ft³ of air volume, tuned to 32 Hz
- Slot port (9½" W × 12" L) for deeper, louder low-end output
- Forward-firing woofer placement aims the bass into the cab
- Built from ⅝" high-quality MDF and carpeted with a durable trunk-liner finish
- Sealed with high-quality Titebond silicone and glued with Titebond wood glue; 2 binding post terminals
- Install notes: removal of the jack kit is required, and the power window motor must be removed during installation
Specifications
| SKU | GS-RF350P28B |
| Application | 08–16 Ford F-350 Crew Cab |
| Woofer Size | Dual 8" |
| Cutout Diameter | 7⅛" |
| Air Volume | 1.35 ft³ |
| Tuning Frequency | 32 Hz |
| Port | 1 slot port (W 9½" × L 12") |
| Mounting Depth | 5" |
| Enclosure Type | Ported |
| Firing Direction | Forward |
| Height | 16⅝" |
| Length | 58" |
| Top Depth | 3" |
| Bottom Depth | 6½" |
| Construction | ⅝" high-quality MDF, carpeted with durable trunk-liner finish |
| Terminals | 2 binding post terminals |
| Weight | 48 lbs |
| Color | Black |
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 7⅛" with 5" 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.