Contact us
Close contact box
Connect ID #
374 239 24
Connect ID #
374 239 24
All finished with your chat session?

We’ll email you a transcript of this conversation for your records.

Our contact center is currently closed.

Please enter your name.  
Please enter a valid email address. Why is this required?
Please enter your US phone number.  

For Tech Support, call 1-888-292-2575

Thank you, !
Our conversation will be emailed to

Your Advisor,

More about me
Please enter a question  
Don't wait on hold. We'll call you back when it's your turn to talk with the next available .
Please enter your name  
Please enter your phone number  

Please enter a message  

Calls may be recorded for training and quality control purposes.

We are located in Virginia USA.

JL Audio Stealthbox ®

Custom-fit fiberglass enclosure with two 12" 12TW3-D8 subwoofers — fits select 2019-up Chevrolet Silverado or GMC Sierra 1500 Crew Cab trucks

Item # 13694668

Get great bass from a custom-designed enclosure that fits under your back seat.

Find what Fits your car

Get great bass from a custom-designed enclosure that fits under your back seat.

Item # 13694668

Ships from distributor

Temporarily out of stock

About the JL Audio Stealthbox ®

Great bass where you want it

The JL Audio Stealthbox® custom-fit subwoofer delivers incredible bass in a package that takes up minimal space and blends in with your vehicle's interior. JL Audio designs these enclosures to fit in specific vehicles, then loads them with appropriate subwoofers for optimal performance. Pair the system with an appropriate amp and wiring for stellar concealed bass. 
JL Audio Built In USA

Great bass where you want it

The JL Audio Stealthbox® custom-fit subwoofer delivers incredible bass in a package that takes up minimal space and blends in with your vehicle's interior. JL Audio designs these enclosures to fit in specific vehicles, then loads them with appropriate subwoofers for optimal performance. Pair the system with an appropriate amp and wiring for stellar concealed bass. 

Perfect sound to go with the perfect fit

JL Audio puts months of research and design into each Stealthbox® custom-fit subwoofer to ensure not only that it fits, but that it sounds better than any other custom enclosed system. First, JL Audio determines the ideal shape and mounting location for each enclosure, so that it looks like an original part of the vehicle it's designed for. Next, they mount each high-performance subwoofer so it delivers amazing firepower from within its unique enclosure, without sacrificing clarity or musical depth.

The fiberglass enclosure offers superior rigidity while allowing more interior volume, so the sub can turn out louder, deeper bass. JL Audio craftsmen then laminate, grind, join, and finish each Stealthbox® by hand. The end result: full-bodied, distortion-free bass from an impressively stealthy enclosure.

Bass in your truck

This Stealthbox installs under the rear bench seat in your Chevy or GMC truck, and does not affect the folding of the rear seat or restrict your leg room. The enclosure contains two 12TW3-D8 subwoofers wired for a 2-ohm load in a down-firing sealed enclosure, handling up to 800 watts RMS.


Product highlights:

  • Stealthbox enclosure fits under rear bench seat
  • sealed fiberglass downward-firing enclosure with black carpet covering
  • two 12" 12TW3-D8 subwoofers
  • power handling up to 800 watts RMS
  • wired for 2-ohm total impedance
  • does not affect folding the rear seat or rear leg room
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # 94668

What's in the box:

  • Custom subwoofer enclosure
  • Two 12" 12TW3-D8 thinline subwoofers (installed)
  • Mounting hardware
  • Installation instructions

Customer reviews

Loading reviews...

JL Audio Stealthbox ® reviews

Average review:

5 reviews

Filter by rating

Customer photos

Sort reviews

Sort by:
Items per page:
View page:

Verified customer (What's this?)
Verified employee purchase (What's this?)



Crutchfield response

<< >>

More details on the JL Audio Stealthbox ®

Pat M.

Product Research


Vehicle Compatibility: The JL Audio SB-GM-SLVCC4/12TW3 Stealthbox is specifically designed for 2019-Up (Gen 4) Chevrolet Silverado / GMC Sierra 1500 Crew Cab Trucks. This Stealboth slips under the truck's rear seat and will not affect the folding of the rear seat or rear leg room.

StealthBox Construction: Constructed from 100% fiberglass with a rugged, weatherproof finish, this JL Audio Stealthbox includes all the mounting hardware needed for a secure, great sounding installation. The Stealthbox even has an perfect spot in the middle of the enclosure for a clean, hidden amplifier installation. JL Audio's Stealth box delivers impressive, high-quality bass without losing any of your precious people space or interior functionality.

Dual 12" Woofers: The SB-GM-SLVCC4/12TW3 Stealthbox contains two JL Audio 12TW3-D8 subwoofers in a down-firing sealed enclosure. It can handle a 800 watts of power and is wired for a 2-ohm impedance load.

  • Dynamic Motor Analysis (DMA): DMA is JL Audio's proprietary method aimed at improving dynamic motor behavior. As a result of DMA optimization, W3v3 motors remain linear in motor force over a very long range of excursion, and also maintain a highly stable fixed magnetic field in the gap over a wide power range. The result is vastly reduced distortion, faithfully reproduced transients, and tight, clean, articulate bass.
  • Floating Cone Attachment Method (FCAM): JL Audio's patented FCAM technology is an innovative method of bonding the surround/cone assembly to the voice coil/spider assembly. This assembly technique ensures proper surround geometry in the assembled speaker for better excursion control and dynamic voice coil alignment.
  • Vented Reinforcement Collar (VRC): The Vented Reinforcement Collar is a composite structure that addresses two issues related to reliability. By reinforcing the critical junction between the cone, voice coil and spider, the VRC greatly reduces failures due to glue breakdown or material weaknesses. It does this by greatly increasing adhesive contact area and providing stress relief to the spider material at excursion extremes. the VRC also feature slots that facilitate air flow directly onto the voice coil windings to reduce thermal compression effects and enhances reliability.
  • Spider/Lead Wire Assembly: The W3v3 features a unique spider, coil and terminal subassembly which is assembled prior to installation in the speaker frame for optimum alignment and glue-joint integrity. The spider is insert-molded into a composite carrier tray which also incorporates the terminal assembly and lead wire strain relief features for enhanced reliability and optimal alignment of parts. The flying lead wires are carefully controlled and strain-relieved without resorting to woven-in lead wires, which can degrade spider performance.
  • Surround Stress Relief: By creating a radiused feature on the edge of the cone, stress is relieved from the surround material at maximum forward excursion, resulting in longer life and more consistent surround behavior.

Hardware & Terminals: The JL Audio SB-GM-SLVCC4/12TW3 Stealthbox incorporatebinding-post terminals and comes with mounting hardware.

Loading accessories...

Customer Q&A

10 questions already asked

does this fit 2020 Silverado 2500 HD. Crew cab?
[ dan  Jan 31, 2021 ]
1 answer
Unfortunately it does not fit the 2020 Silverado 2500 crew cab. We do not currently carry any Stealthboxes that do fit, but we may have some in the future since this is a newer model truck.
[ Allison  Feb 17, 2021 ]  Staff
is this the only box? i have 8" speakers
[ FRANK  Jan 13, 2021 ]
1 answer
We often do have other vehicle specific subwoofer boxes and some of them are empty allowing subs to be installed. I recommend contacting an advisor by calling 1-800-324-9695 to get a personal check on our current inventory for your vehicle.
[ Paul  Jan 30, 2021 ]  Staff
do they make a box for 2020 chevy silverado under rear seats? for 8" speaker's
[ FRANK  Jan 13, 2021 ]
1 answer
I've only seen the 10" Enclosures. I have the 12" subs, bar a few mods it's well worth it in sound quality.
[ Stephen  Jan 14, 2021 ]
Vx700/5i enough of an amp and processor to run the stealth 2- 12â??s stealth box for my Chevrolet crew cab 2019 ?
[ brian  Oct 04, 2020 ]
1 answer
I put the box in my 2019 GMC double cab. It called for the smaller box with 10's but I'm happy I went with the12's. It's not a perfect fit but the sound quality is well worth the tiny space sacrifice I gave up at the feet of a larger shoe size rear passenger.
[ Stephen  Oct 04, 2020 ]
Will I need a Low Pass Filter for The head unit?
[ MandB  Jul 31, 2020 ]
1 answer
Is the plan to connect it to a factory head unit? You will likely have a low-pass filter option in the amp you choose to power it. You can connect with one of our friendly product advisors to help pick an amp that will have that feature, and the right power and impedance:
[ Cosmo  Aug 16, 2020 ]  Staff
Will it affect a Factory Bose System?
[ Bubby P  Jun 10, 2020 ]
1 answer
The answer depends on what you want to do with your system. I have both (factory) Bose and Audio Control amps in my truck and it sounds great. The Bose only works the factory center console speaker in my set up. And I use the Audio Control LC 1-800 on my stealth box and the Audio Control D6-1200 on my (Herzt) dash and door speakers.
[ Stephen  Jun 10, 2020 ]
Which JL audio amplifier do you recommend with this product?
[ Ivan  Apr 15, 2020 ]
1 answer
Thanks for your question. For information on selecting the best amp I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system.
[ Krissy  Apr 28, 2020 ]  Staff
Does this work with exiting audio system?
[ Jason  Jan 29, 2020 ]
2 answers
The factory Bose amp isn't enough power to run the stealth box and the factory Bose system.
[ Stephen  Jun 10, 2020 ]
You will need an amplifier, and the wiring to get power, ground, and signal to everything! One of our advisors would love to help you!
[ Calvin  Feb 13, 2020 ]  Staff

Loading articles...