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JL Audio Stealthbox®

Custom-fit fiberglass enclosure with 12" TW3-D4 subwoofer — fits 2015-up Ford Mustang coupe

Item # 13694617

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

Find what Fits your car

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

Item # 13694617

C$1,249.99

About the JL Audio Stealthbox®

JL Audio Built In USABass that fits your car

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 Bass that fits your car

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 in the passenger side of the trunk of your 2015-up Ford Mustang coupe, in the same location as the optional factory sub. This Stealthbox includes one 12" 2-ohm 12TW3-D4 subwoofer from JL Audio. 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.

Note: Factory subwoofer (if equipped) must be removed for installation of Stealthbox. Will not fit convertible models.

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Product highlights:

  • Stealthbox® custom-fit subwoofer
  • sealed fiberglass enclosure
  • TW3-D4 12" 2-ohm voice coil subwoofer
  • steel-mesh grille included
  • fits in passenger side of the trunk
  • power handling: 400 watts
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # 94617

What's in the box:

  • Enclosure w/installed 12TW3-D4 subwoofer
  • 1 Coupe cover trim
  • One 3/8" U-nut
  • Three 1/2" steel spacers
  • 7/8" Plastic plug
  • One 3/8-16 x 2.5" set screw
  • Two M8 x 70mm set screws
  • One 3/8" x 1-1/4" fender washer
  • Two 3/8" flat washers
  • Two M8 - 16mm flat washers
  • Two M8 - 24mm flat washers
  • One 3/8" lock washer
  • Two M8 lock washers
  • One 3/8" threaded nut
  • Two M8 - 1.25mm threaded nut
  • Installation instructions
  • Warranty information

Customer reviews

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JL Audio Stealthbox® reviews

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More details on the JL Audio Stealthbox®

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Product Research

Features

Overview: The JL Audio SB-F-MUSCPE/12TW3 Stealthbox features a 12TW3-D4 thin-line subwoofer mounted in a sealed fiberglass enclosure that's designed to fit select 2015-up Ford Mustang Coupes. Wired for 2Ω mono operation, the non-powered subwoofer can handle 400 watts of RMS power. 

Mounting: The Stealthbox sub is specifically shaped to fit in the passenger side rear corner of the trunk, taking the place of the factory subwoofer if equipped. All mounting hardware is provided with no drilling necessary for installation. Note: The SB-F-MUSCPE/12TW3 enclosure will not fit in convertible models.

Specifications:

  • Enclosure Type: Sealed
  • Driver Type: 12TW3-D4
  • Nominal Impedance: 2 Ohms
  • Continuous Power Handling: 400 Watts RMS

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Customer Q&A

12 questions already asked

Q
Do they make one for both sides of the trunk?
[ Chad  Apr 13, 2020 ]
1 answer
A
IT appears there is only a single side model.
[ Calvin  Apr 28, 2020 ]  Staff
Q
Do they make one for both sides of the trunk?
[ Chad  Apr 13, 2020 ]
2 answers
A
As of April 2020, no. The JL Audio Stealthbox is designed to fit into the right side of the trunk only.
[ Charles  Apr 13, 2020 ]
A
Unfortunately I don't know the answer to that but I would like to know if they do also.
[ HENRY  Apr 13, 2020 ]
Q
Is the stock amp compatible with this or would an upgraded amp be better. If so which amp would be a good fit?
[ Devin  Mar 09, 2020 ]
1 answer
A
Thanks for your question. For information on selecting the best amp for your subs 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 02, 2020 ]  Staff
Q
So does this only come with 1?
[ Tyler  Feb 23, 2020 ]
1 answer
A
Yes it only comes with one. It has a great sound. Be patient with the install, it is a tight fit.
[ HENRY  Feb 26, 2020 ]
Q
So this is just a box and speaker - no amp is included? For nearly $900 I guess I'd expect an amp would be included. Is this price so high because of the box or the speaker? I like that it looks OEM, but again that's quite a price tag for a box and speaker, and no amp.
[ Chris  Jan 27, 2020 ]
1 answer
A
This is a passive enclosure, meaning that you will need an appropriate amplifier to power it. The JL Stealth boxes are custom designed and made for vehicle fitment. They are made of extremely high quality fiberglass materials, and include a perfectly tuned sub for the enclosure. They are pricey, but when properly powered, they sound incredible!
[ Calvin  Mar 08, 2020 ]  Staff
Q
Is this enclosure available without the sub?
[ Tony  Dec 27, 2019 ]
2 answers
A
The JL Audio StealthBoxes are only made and sold with the subwoofers that they are designed for in them.
[ Calvin  Jan 08, 2020 ]  Staff
A
Unfortunately I don't know if it does or not. It does do the job with the sub it has in it. Works well and sounds great.
[ HENRY  Jan 07, 2020 ]
Q
How can I stop my subwoofer cover from popping off? Can, I super glue it?
[ Iceman  Sep 08, 2019 ]
2 answers
A
Unfortunately I have had the same problem. At this time I have eliminated it.
[ HENRY  Sep 09, 2019 ]
A
Great question I would like to know the answer to that as well.
[ JOE  Sep 09, 2019 ]
Q
Can you point out the frequency response of this subwoofer?
[ bamsmad  Jul 31, 2019 ]
1 answer
A
I use the TuN app and set my high pass filter to 20hz and my low pass filter to 200hz at 24 db. From what I have read that seems to be the frequency response range for this sub. If you use the TuN app you can fine tune it further for your sound preference.
[ Robert  Aug 01, 2019 ]
Q
Does this sub fit a mustang without a OEM sub ?
[ Giancarlo  Jun 22, 2018 ]
2 answers
A
Yes
[ brian  Jun 24, 2018 ]
A
Yes it does.
[ Billy  Jun 22, 2018 ]
Q
Can this be a direct swap with the factory subwoofer (401A package)? Are there any additional items I would need?
[ Brent  Mar 13, 2018 ]
2 answers
A
I don't know I didn't have factory subwoofer
[ BRIAN  Mar 14, 2018 ]
A
I am not sure because my installer kept head unit, swapped out speakers and added this box. The box fits like a glove and has great sound. Installed it in my gt350r and love it
[ GEOFFREY R  Mar 13, 2018 ]
Q
do you guys know if 2017 Mustang EcoBoost Premium 200A package have pre-wired harners for Subwoofer in trunk?
[ Igor  Sep 04, 2017 ]
1 answer
A
The JL Audio Stealthbox does not come with an amp to power the built-in subwoofer. Any aftermarket amp that can power the JL sub properly will need new wiring for it's installation. For additional assistance and personalized recommendations, feel free to contact us directly by phone or through our online chat service: https://www.crutchfield.com/support/ContactUs.aspx
[ Ryan  Sep 06, 2017 ]  Staff
Q
What is the recommended amplifier to go with this subwoofer?
[ Matthew  Nov 14, 2016 ]
1 answer
A
Thanks for your question. For information on selecting the best amp for your sub 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.
[ Kenny  Nov 14, 2016 ]  Staff
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