JL Audio SB-D-MGACABG4/10TW1 Stealthbox 10" 300W RMS (600 Peak Power Handling) 2 Ohms, Enclosure Subwoofer for 2006-Up RAM 2500/3500 Mega Cab
We are a JL Audio authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!
What's Inside?
- • 10" Stealthbox Enclosure Subwoofer
- • (2) 10TW1-4 in a sealed enclosure
- • Owner's Manual
Why Choose JL Audio SB-D-MGACABG4/10TW1 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
Ram's Mega Cab delivers a cavernous cabin with one of the largest interiors available in a pickup. Too bad the factory audio systems are ill-equipped and struggle in the bass reproduction department. To overcome this challenge, our engineers developed a subwoofer solution that installs neatly, behind the back seat of this monstrous people mover, without compromising rear seat comfort. Featuring 100% fiberglass construction, this Stealthbox® is outfitted with two of our innovative, 10-inch TW1 thin-line subwoofers in a custom-formed, sealed enclosure. The result is outstanding sub-bass performance with deep extension and solid impact. For those looking for even more performance, two enclosures can be installed side by side for up to 6dB more of jaw-dropping output. The Hard Data: Contains two 10TW1-4 in a sealed enclosure. 600 watt power handling. Wired for 2 ohm mono. Installation requires removal of rear seat storage compartment and OEM subwoofer, if equipped.

Frequently Asked Questions (FAQ)
- • Will this Stealthbox fit behind the seats of a standard Ram Crew Cab or Quad Cab?
No. This enclosure is custom-molded exclusively to utilize the specialized rear firewall space of the massive Ram 2500/3500 Mega Cab platform. It will not fit any other cab configurations.
- • Do I have to permanently sacrifice my behind-seat truck storage space to install this?
Yes. Installation requires the complete mechanical removal of the factory rear seat storage compartment bin and the OEM subwoofer assembly if your truck came equipped with them.
- • What final wiring load impedance does this dual 10-inch enclosure present to my amplifier?
The two internal 10TW1-4 thin-line subwoofers are pre-wired together in parallel inside the fiberglass shell. The single external terminal cup outputs a final 2-ohm mono load.
- • What continuous amplifier power rating do I need to run this system optimally?
The enclosure features a combined continuous power handling rating of 600 watts RMS. You should pair it with a clean monoblock amplifier that delivers 400 to 600W RMS at 2 ohms.
- • Why does the bass response sound weak, thin, or heavily rolled off at higher volumes?
The factory Ram Alpine head unit aggressively pulls out low-end bass frequencies as volume increases to protect cheap stock speakers. You must use an active integration module to clean up the signal.
- • Can I run two of these exact Stealthbox enclosures side-by-side behind the Mega Cab seats?
Yes. The rear firewall geometry allows you to mount two identical enclosures seamlessly side-by-side. Doing so doubles your cone area and yields up to a massive 6dB increase in total output.
- • Will installing this box prevent my Mega Cab rear seats from reclining or folding down properly?
No. JL Audio custom-engineered the wedge depth of the fiberglass shell so it matches the slant of the rear wall, preserving full factory seat reclining comfort and folding mechanisms.
- • Why am I hearing a severe rattling noise from the back wall whenever the bass notes hit?
The immense kinetic pressure of the dual subs can shake loose wire looms or thin metal panels along the cab wall. Applying a layer of butyl sound-damping material to the metal firewall completely cures this issue.
Learn how to wire subwoofers

- Diameter : 10 Inch
- Impedance : 2 Ohm
- Peak Power Handling : 600 Watts
- Number Of Subwoofers : 4
- Vehicle Make : RAM
- RMS Power Handling : 300 Watts
Features:
- Stealthbox® designed for 2006-Up RAM 2500/3500 Mega Cab models
- Custom-engineered to fit neatly behind the back seat, maximizing cabin space
- Constructed with 100% fiberglass for durability and acoustic performance
- Features two 10-inch TW1 thin-line subwoofers for powerful bass reproduction
- Provides outstanding sub-bass performance with deep extension and solid impact
- Custom-formed sealed enclosure ensures optimal sound quality
- Can be installed side by side with another enclosure for increased output (up to 6dB)
- 600 watts power handling for robust and dynamic sound
- Wired for 2-ohm mono configuration for compatibility with a variety of amplifiers
- Installation requires removal of rear seat storage compartment and OEM subwoofer, if equipped
- Enhances factory audio system by delivering rich, immersive bass without compromising rear seat comfort
Specifications:
- Includes two 10" TW1 (Thin-Line) Series Single 4-ohm Subwoofers
- Power Handling:
- RMS: 300 watts
- Recommended Power Range: 75 - 300 watts
- Impedance: Single 4-Ohm
- Injection molded, mica-filled polypropylene cone
- Rubber surround
- No pole vent: permits mounting close to rear wall of enclosure.
- Ultra-compact sealed enclosure volume requirements
- Long linear excursion capability
- DMA-optimized motor designs
- Engineered Lead-Wire System
- Patented concentric tube architecture
- Patented floating cone attach method technology
- Cast alloy frame with flat edges for tight driver grouping
- Steel mesh grille included with each driver
- Precision-built in the USA at JL Audio's Miramar, Florida factory
- Mounting depth: 4.36 "
- Cutout dimensions: 9.0625 "
- Free Air Resonance (Fs): 38.09 Hz
- Sensitivity: 82.2 dB
- Xmax: 10.0 mm
- Equivalent Compliance (Vas): 12.15 L
- Frequency response: ~26 ~ 200 Hz
- Authorized Internet Dealer
- 1-year Manufacturer's Warranty
- UPC:
- Weight: 20
- 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.