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JL Audio Stealthbox®

Custom-fit fiberglass enclosure with two 12" 12TW3-D8 subwoofers — fits 2009-up Ford F-150 SuperCrew and SuperDuty Crew Cab trucks

Item # 13694661

The JL Audio Stealthbox custom-fit subwoofer delivers incredible bass in a package that takes up minimal space and...

Find what Fits your vehicle

The JL Audio Stealthbox custom-fit subwoofer delivers incredible bass in a package that takes up minimal space and...

California customers:
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Item # 13694661

In stock

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60-day price protection

We’ll reimburse you if the price drops.

Free custom vehicle instructions

Installation help for your car, from our experts.

About the JL Audio Stealthbox®

Low-profile bass

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 Stealthboxes 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

Low-profile bass

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 Stealthboxes 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.

Enjoy enhanced, custom-fit sound

This Stealthbox enclosure fits select 2009-up Ford F-150 SuperCrew and SuperDuty Crew Cab trucks and installs under the rear seat. This Stealthbox® includes two 12" 12TW3-D8 thinline subwoofers from JL Audio and is wired for 2-ohm total impedance. You'll need to remove the under-seat storage tray and factory subwoofer (if equipped). Please check with us before purchasing by using the vehicle selector on our site, or calling an Advisor at 1-888-955-6000 to verify fit information.


Product highlights:

  • Stealthbox custom-fit subwoofer
  • sealed fiberglass enclosure
  • two 12" 12TW3-D8 subwoofers
  • installs under the rear seat
  • 800 watts RMS power handling (1600 watts peak power)
  • 2-ohm total impedance
  • requires removal of under-seat storage tray and factory sub (if present)
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # 94661

What's in the box:

  • Custom subwoofer enclosure loaded with two 12" TW3-D8 thinline subwoofers
  • Mounting hardware
  • Installation instructions

Customer reviews

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Crutchfield response

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More details on the JL Audio Stealthbox®

Pat M.

Product Research


Overview: JL Audio's SB-F-150-SCDBL/12TW3/BK Stealthbox has been specifically designed to fit select 2009 and later Ford SuperCrew full size pickups. Please enter your vehicle information to confirm fit. The enclosure features two 12" 12TW3-D8 subwoofers in a custom down-firing sealed enclosure that mounts under the rear seat.

Subwoofers: The two 12" TW3-D8 thin-line subwoofers offer a combination of a shallow mounting depth and high excursion capability, producing deep powerful bass from a small enclosure. They feature a concentric tube structure built into the injection-molded mica-filled cone body. This supports the voice-coil and spider, while allowing the larger motor structure to be placed further forward in the speaker than with conventional designs. The two dual 8Ω voice-coil subwoofers are wired in parallel to present a 2Ω load on the single pair of terminals, and are capable of handling 800 watts RMS (400 watts RMS each driver).

Enclosure: The Stealthbox enclosure is made of fiberglass covered in black carpet designed to blend in with the vehicle's interior. The enclosure is designed to mount under the rear seat, so no usable cargo or passenger space is taken up. The enclosure will not effect the folding of the rear seats or passenger's leg room.

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Customer Q&A

13 questions already asked

Do the subs come included with the box?
[ Carlos  Jan 31, 2023 ]
1 answer
They do, Carlos. Part of the reason these Stealthboxes sound so good is because they are specifically tuned for the JL subwoofers included. All you need to do is add a mono amplifier that is a good match for the JL Audio Stealthboxes 800-watt RMS rating and you are set for some musical, accurate, and downright impressive bass!
[ Bo  Jan 31, 2023 ]  Staff
Is there a spot for mounting the amp on the box? Or is there room for an amp under the seat when box is installed?
[ Kerry  Oct 11, 2021 ]
3 answers
No there's no room. Amp would have to go behind the seat.
[ Mike  Oct 11, 2021 ]
There is no room to mount the amp on the box or under the seat. The box is just tall enough to fit underneath the seat perfectly. I have my amp mounted behind the rear seats. There is tons of room back there.
[ STEVE  Oct 11, 2021 ]
No there is not. But... you can mount amp behind the seat.
[ FLEETWOOD  Oct 11, 2021 ]
What size speaker wire does the box except?
[ Mike  Sep 15, 2021 ]
1 answer
I don't know the max size but I'm running 12gauge box dose not disappoint
[ CHRIS  Sep 15, 2021 ]
What does the wiring attatchment/harness look like on the sub?
[ Reece  Aug 07, 2021 ]
1 answer
Its just a standard +/- wire hookup. One positive, one negative
[ Thomas  Aug 08, 2021 ]
In my 2018 Ford raptor 802 a package what amp would you recommend, and what other components do I need in order to utilize the existing system and head unit? I would like to have everything arrive at the same time for a seamless install.
[ Kyle  Jun 20, 2021 ]
1 answer
JL Audio recommends matching it with the XD600/1v2 amp. We have advisors that can be reached by calling 1-800-324-9695 who can discuss the specifics of your vehicle and goals to give a personal recommendation on all the parts to complete the installation.
[ Paul  Jun 22, 2021 ]  Staff
What subsonic filter frequency is recommended for this enclosure? - thanks
[ RYAN  Oct 12, 2020 ]
2 answers
JL Audio recommends the use of the Jl Audio XD600/1v2 amp for power, with several recommended settings for optimal performance. It is recommended to use the LP Filter Slope, and tune the filter frequency to 80Hz. For product advice, or additional information, please chat with us online or by phone at 1-800-324-9695.
[ Jess  Oct 29, 2020 ]  Staff
Unfortunately this is NOT a good Sub box , it's fiberglass and it sounds really bad , not a deep bass and the fiberglass makes noise from the bass. Definitely not worth the money that JL is asking. A huge disappointment and waste money.
[ SERGIO  Oct 27, 2020 ]
Could these fit with Weathertech F-150 FloorLiner?
[ Bernard  Jun 02, 2020 ]
3 answers
Yes it can I meant
[ Michael  Jun 02, 2020 ]
Yes I can. I got the complete weather tech set for my sons truck before I got him the box.
[ Michael  Jun 02, 2020 ]
Yes, the floor liner stops where there is a "divet" in the flooring, which is as far forward as the box comes.
[ Ben  Jun 02, 2020 ]
Does this box give the woofers enough room to travel?
[ Melvin  Apr 05, 2020 ]
3 answers
I have them in a 2012 F150. The sound quality is great and theres no indication that the subs are hitting the grill. The box is made by JL so it's designed specifically for these subs so no need to worry about woofer travel issues.
[ Jeff  Apr 06, 2020 ]
Yes it does but if you are looking for something to wake your neighbors up this is not the Box for you
[ Swithin  Apr 06, 2020 ]
Yes , you don't even kn it's there, love it !!
[ Mark  Apr 05, 2020 ]
what amplifier specs are recommended?
[ Darion  Jan 26, 2020 ]
2 answers
One of the Crutchfield experts recommended the JL Audio jx1000/1 mono amp. Works great for me! Sounds great and subs fit perfectly under my seat.
[ Jeff  Feb 01, 2020 ]
JL AUDIO 1000/1. Nice hard hitting bass for my 2019 f250 crew cab truck.
[ Carlos  Jan 26, 2020 ]
Just bought new F150 Raptor supercrew but don't see it listed- is it going to fit. Also is there a separate sub level control to go with it. Also is there space next to it under the seats for the amp like there is with the single sub box? thanks.
[ Justin  Jan 27, 2019 ]
1 answer
It is recommended for 2009 "and up" SuperCrew & SuperDuty Crew cabs, yes. It does not have built-in amplification so, it does not come with a level control. There are many compatible amplifiers that do offer a wired remote (either included with the amp or sold separately). There is no space provided for mounting of the amp under the rear seat. For additional assistance and personalized recommendations, feel free to contact us directly by phone or through our online chat service:
[ Ryan  Jan 30, 2019 ]  Staff
What amp would be good to use with this?
[ Randy  Oct 11, 2018 ]
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  Oct 16, 2018 ]  Staff

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