JL Audio SB-D-5GRAMQC/10TW3 Stealthbox 10" 400W RMS (800W Peak Power Handling) 2 Ohms, Enclosed Subwoofer for 2020-Up RAM 1500 Quad Cab Models
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What's Inside?
- • 10" Stealthbox Enclosed Subwoofer
- • (2) 10TW3-D8 Subwoofers in a sealed enclosure
- • Owner's Manual
Why Choose JL Audio SB-D-5GRAMQC/10TW3 Stealthbox System?

Built in U.S.A. with Global Components
At a time when most audio products are built overseas, JL Audio’s commitment to in-house loudspeaker production continues to grow. To pull this off in a competitive world market, our production engineering team has created one of the world’s most advanced loudspeaker assembly facilities and established a global network of quality component suppliers who build to our specifications. This, combined with our commitment to state-of-the-art assembly technology, allows our skilled workforce to efficiently build JL Audio products to extremely high quality standards, right here in the U.S.A.
Since most of our premium loudspeakers incorporate proprietary, patented technologies requiring specific assembly techniques, we find it is vital that the people who designed them have close access to the people manufacturing them. The following JL Audio products are built in our Miramar, Florida factory, with global components:
•Subwoofers: W7, W6v3, TW5v2, TW3, TW1, W3v3
•Enclosed Car Subwoofers: Stealthbox®, PowerWedge™, ProWedge™, H.O. Wedge™ & MicroSub™ Enclosed Subwoofers
•Marine Loudspeakers, Marine Subwoofers and Marine Enclosed Loudspeakers
•Home Subwoofers: Dominion™, E-Sub, Fathom® and Gotham®
Featuring 100% Fiberglass Construction
This generation of RAM’s big hauler combines a bold new design with major advancements in aerodynamics, technology and towing capabilities. Disappointingly, the original equipment audio systems lack the low-frequency output and performance you might expect. Luckily, our engineers are experts in maximizing bass from minimal space and developed a subwoofer solution that fills your Quad Cab with loads of powerful bass output. Featuring a 100% fiberglass, sealed enclosure design, this Stealthbox® houses two of our innovative 10TW3 thin-line subwoofers and installs neatly under the rear seat, without compromising rear seat comfort or folding. We even left space on the enclosure that’s perfect for a small, hidden amplifier installation!
Frequently Asked Questions (FAQ)
- • Will this dual 10-inch Stealthbox fit my Ram 1500 Crew Cab truck?
No. The "QC" signifies it is custom-molded strictly for 5th Generation Ram 1500 Quad Cab models. Crew Cab models have different rear under-seat floor geometries and require a "CCF" or "CCR" model.
- • What do I need to clear out from under my rear seat before installation?
You must completely unbolt and remove the plastic factory under-seat storage tray if your truck is equipped with one. The enclosure requires a totally bare floor pan to drop in flush.
- • What final wiring load impedance does this dual box present to an amplifier?
The enclosure houses two 10TW3-D8 drivers pre-wired together internally in parallel. The single external terminal cup presents a final 2-ohm mono load to your amplifier.
- • Where am I supposed to mount an amplifier if I have zero remaining cab space?
JL Audio explicitly engineered the top exterior frame layout of this fiberglass shell with a recessed, flat mounting area specifically designed to hold and hide a compact amplifier.
- • Why does the bass output roll off or sound weak at high volume?
The factory Ram radio aggressively trims low-bass frequencies as volume goes up to protect stock speakers. You must use a premium active integration adapter (like an AmpPro module) to feed your amp a stable, unclipped signal.
- • Will installing this box prevent my Quad Cab rear seats from folding down or locking?
No. The enclosure is meticulously contour-molded to match the factory seat bottom lines. Passenger legroom, seat folding ranges, and latch locks function perfectly exactly like stock.
- • What is the recommended continuous RMS amplifier power for this setup?
The combined handling capability is 800 watts continuous RMS. To maximize output cleanly without damaging the thin-line drivers, pair the box with a high-quality 600W to 800W RMS monoblock amplifier at 2 ohms.
- • Why do I hear a severe plastic-on-metal rattling sound under the seat when bass notes hit?
This occurs if the provided mounting hardware isn't anchored securely through the floor pan, or if loose seat belt buckles are vibrating against the top of the box. Secure the anchor bolts tightly and add foam to loose contacts.
Learn how to wire subwoofers

- Diameter : 10 Inch
- Impedance : 2 Ohm
- Peak Power Handling : 800 Watts
- Number Of Subwoofers : 2
- Vehicle Make : RAM
- RMS Power Handling : 400 Watts
Features:
- Stealthbox® designed specifically for 2020-Up RAM 1500 Quad Cab models
- Features two 10TW3-D8 subwoofers for powerful bass performance
- Each subwoofer has a diameter of 10 inches
- Sealed enclosure design for accurate and tight bass response
- 800 watts peak power handling for robust and dynamic sound output
- Wired for 2-ohm mono configuration
- Installation requires removal of rear underseat storage tray, if equipped
- Provides seamless integration into the vehicle's audio system
- Enhances overall audio experience without sacrificing cabin space or aesthetics
- UPC: 699440946773
- Weight: 40
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.