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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 vehicle

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

Item # 13694668

In stock
C$2,799.95

About the JL Audio Stealthbox ®

Bob Bihlmayer

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.

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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
  • MFR # 94668

What's in the box:

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

Customer reviews for JL Audio Stealthbox ®

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Average review:

5.0 out of 5 stars
17 reviews

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More details on the JL Audio Stealthbox ®

Pat M.

Product Research

Features

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 has binding-post terminals and comes with mounting hardware.

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Customer Q&A

19 questions already asked

Q
Will there be fitment issues if the truck has the OEM rear premium all weather mats?
juan  Nov 28, 2023
1 answer
A
Greetings Juan. I wish I had a good answer for you. We would not have the specific install information you are looking for. From the looks of it, I think there would be with almost any floor mats. Some trimming of the mats perhaps, or even remove the mats. Maybe JL can answer this question better. Their number is 954-624-0113.
hogan  Nov 28, 2023 (Staff)
Q
Does this require the removal of the factory Jack and Tools on the 22 Refresh?
shane  May 11, 2023
4 answers
A
Confirmed the jack and jack tools stay in place. No removal required. 2023 GMC Sierra 1500 AT4x. Fits perfect.
shane  Jun 03, 2023
A
Yes the jack needs to be relocated. The tool pouch on the drivers side can stay in factory location
steffany  May 14, 2023
A
No I did not have to remove mine on my 2021
david  May 12, 2023
A
Yes it does have to be removed. I never trust that little small jack to lift these trucks
elgin  May 12, 2023
Q
JL states (on their we page) that their SB-GM-SLVCC4/12TW3 is a "Stealthbox?? for 2019-Up (Gen 4) Chevrolet Silverado / GMC Sierra 1500 Crew Cab Trucks and 2020-Up 2500 / 3500 Crew Cab Trucks". Notice JL's "2020-Up 2500 / 3500 Crew Cab Trucks" phrase. However, item # 13694668 when chosen on Crutchfield's site for my chosen "2023 GMC Sierra 2500/3500 Pickup Crew Cab" make & model (and a Crutchfield response to a 2020 2500 customer) indicate that # 13694668 does *not* fit. Is that discrepancy rooted my choice, JL's web page, or Crutchfield web page/response?
bill  May 10, 2023
1 answer
A
I would be happy to help, Bill. This actually could be a case where all info IS correct, and I can see why that causes some confusion. These JL Stealthboxes are custom fit, and they do only work in certain cab styles and trim levels. I do show that in your 2023 HD (2500/3500) this JL Stealthbox will not be a fit with any trim level. The SPL boxes unloaded subwoofer box is an option for your truck in either sealed OR ported, so you could create your own custom subwoofer solution. Check it out in the link below! We can also help you come up with a bespoke subwoofer solution since the JL is not an option, call us anytime at 1-800-324-9695 and a live Advisor can help get your order placed! https://www.crutchfield.com/p_419184212B/SPL-Boxes-SB184-212BL.html
bo  May 11, 2023 (Staff)
Q
Do you guys make a box that fits a 2021 1500 Chevy double cab?
dante  Jan 23, 2023
1 answer
A
Greetings Dante, and thank you for your question. JL Audio does make a Stealthbox for the 2019 and up body double cab. Check here: https://www.crutchfield.com/p_13694676/JL-Audio-Stealthbox.html?id=detailed_info
hogan  Jan 23, 2023 (Staff)
Q
Hello, do you guys have the dimensions? Or do you know if this will fit in the refreshed 2022 Chevy Silverado 1500 crew cab ?
andrew  Nov 16, 2022
1 answer
A
Greetings Andrew, and thank you for your question. Jl Audio does not give out any dimensions, however on their site they have this Stealth Box listed as fitting the 2022 Crew Cab.
hogan  Nov 16, 2022 (Staff)
Q
When will this be back in stock?
kyle  Dec 09, 2021
1 answer
A
At the time of this reply, we do not know when this will be back in stock. We typically keep the web page updated with any information we get on this and have advisors that can be reached by calling 1-800-324-9695 to check if there are any updates not yet posted on this web page
jason  Dec 11, 2021 (Staff)
Q
It shows its out of stock, but what is the price?
dustin  Jun 25, 2021
1 answer
A
When it was last in stock, the price was 1599.99. As of right now ( 6/25/2021) we do not know when they will be available again, and do not know if the pricing will be different when they do become available again. Hopefully they come back soon!
thomas  Jun 25, 2021 (Staff)
Q
Recommended amplifier?
travis  May 23, 2021
1 answer
A
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.
kristina  Jun 09, 2021 (Staff)
Q
"The Stealthbox even has an perfect spot in the middle of the enclosure for a clean, hidden amplifier installation." Maximum physical size of amplifier?
keith  May 23, 2021
1 answer
A
I have a jl1000 class d and a jl 400x4 and all wiring in that spot. I am not near a tape measure but would estimate 16 in long x 10 in wide... and still has factory jack in place with no interference. Hope this helps
bobby d  Jul 24, 2021
Q
What size amp would you suggest?
penny l  Feb 22, 2021
1 answer
A
I have a JL 1200/1 HD and it rocks. I have been told my subs sound better than any thing people have ever heard!
kyle  Apr 07, 2023
Q
does this fit 2020 Silverado 2500 HD. Crew cab?
dan  Jan 31, 2021
1 answer
A
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)
Q
is this the only box? i have 8" speakers
frank  Jan 13, 2021
1 answer
A
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.
jason  Jan 30, 2021 (Staff)
Q
do they make a box for 2020 chevy silverado under rear seats? for 8" speaker's
frank  Jan 13, 2021
1 answer
A
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
Q
Vx700/5i enough of an amp and processor to run the stealth 2- 12??????s stealth box for my Chevrolet crew cab 2019 ?
brian  Oct 04, 2020
1 answer
A
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
Q
Will I need a Low Pass Filter for The head unit?
mandb  Jul 31, 2020
1 answer
A
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: https://www.crutchfield.com/I-rET1c290/S-SUliZgSTXG7/support/ContactUs.aspx
casey  Aug 16, 2020 (Staff)
Q
Will it affect a Factory Bose System?
bubby  Jun 10, 2020
2 answers
A
No
kyle  Apr 07, 2023
A
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
Q
Which JL audio amplifier do you recommend with this product?
ivan  Apr 15, 2020
1 answer
A
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.
kristina  Apr 28, 2020 (Staff)
Q
Does this work with exiting audio system?
jason  Jan 29, 2020
2 answers
A
The factory Bose amp isn???t enough power to run the stealth box and the factory Bose system.
stephen  Jun 10, 2020
A
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! https://www.crutchfield.com/support/ContactUs.aspx
thomas  Feb 13, 2020 (Staff)
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