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JL Audio Stealthbox®

Custom-fit fiberglass enclosure with one 10" 10TW3-D4 subwoofer — fits 2012-up Ford Focus 5-door hatchback models (Black)

Item # 13694560

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

Find what Fits your car

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

Need help?
Contact our Virginia-based experts.
1-888-955-6000
5 advisors available

Item # 13694560

Ships from manufacturer

$719.99
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About the JL Audio Stealthbox®

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 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 contains one 10" 10TW3-D4 subwoofer, and installs on the passenger side in the rear cargo area of 2012-up Ford Focus five-door hatchback models. 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.

Installation note: The installation of this Stealthbox® requires permanent modification to the factory cargo area floor. JL Audio has rated the difficulty of this Stealthbox installation as low to medium. You should be able to install this enclosure if you have any experience with car audio. This Stealthbox® will not fit the Ford Focus sedan.

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Product highlights:

  • Stealthbox® custom-fit subwoofer for 2012-up Ford Focus 5-door hatchback models
  • sealed fiberglass enclosure
  • one 10" 10TW3-D4 subwoofer with 2-ohm impedance
  • installs in cargo area on passenger side
  • power handling: 100-400 watts RMS (800 watts peak power)
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # 94560

What's in the box:

  • Custom subwoofer enclosure loaded with a single 10" 10TW3-D4 subwoofer

Customer reviews

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JL Audio Stealthbox® reviews

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7 reviews

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5 out of 5

Jay-Michael from Charlotte, NC on 5/25/2019

2016 Ford Focus

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

I've had this installed in my Focus ST for a couple of months now and couldn't be more pleased. Paired with the JL Audio XD300, Excellon XR600-6DSP, iDatalink Maestro AR, everything sounds the way it should have from the factory. It hits harder and louder than many 12"s I had in the last 20 years.

Pros: Great sound

Cons: Pricey.

Crutchfield response on

0 of 0 found this helpful

Awesome sound, nice fit, terrible mounting method

Ryan Hafen from Pa on 10/24/2018

2014 Ford Focus

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

So clean and tight bass... puts all my other previous systems to shame. Expensive but worth it. Driven by a JL 300w amp. Blown away. Love it. Only painful part was installation. I had to take the body cladding apart then drill a big hole through my car body into the wheel well. Good God, what engineer thought that was a good idea? There are body posts in the area, why ask people to drill huge holes in their cars? Lastly, the speaker wire inputs are in the rear, so if you need access, you have to unbolt everything. Dumb. Can't give it 5 stars as its so bad.

Pros: Sound, performance, looks. Everything but the install.

Cons: Mounting x1000

Crutchfield response on

0 of 0 found this helpful

The Best Option Money Can Get

Ryan from York, PA on 5/25/2018

2017 Ford Focus

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

Perfect fit and amazing performance. I powered it with a 5 channel amp which outputs 300 watts at 2 ohms and it meshed perfectly. I couldn't ask for anything more since it retained about all of my trunk space and added some much needed lower frequency punch.

Pros:

Cons:

Crutchfield response on

1 of 1 found this helpful

JL Audio Stealthbox

Leon from Sumter, SC on 3/18/2018

2014 Ford Focus

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

fit like a champ ! very easy install.

Pros:

Cons:

Crutchfield response on

2 of 2 found this helpful

Stealth box

Crutchfield customer from Martinsburg, wv on 7/18/2015

2014 Ford Focus

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

Looks and sounds great. Blends in anf looks like it came with it. Trying to figure out the right amp for it, but that's on me.

Pros:

Cons:

Crutchfield response on

4 of 4 found this helpful

Amazing Sounding Sub, Terrible Mounting Flaw...

Ghastlyone from Nevada on 2/26/2015

2014 Ford Focus

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

Okay, first things first, build quality and packing of this Stealthbox is top notch. Just like the other 2 JL Stealthboxes I've purchased in the past, this one for the Ford Focus hatchback didn't disappoint in that regard. The carpeting quality and color used was near an exact match of the factory interior. So why am I only giving this product 3 stars? First, the "brand new" box I received directly from JL Audio shipped with a bad speaker. Secondly, the mounting solution has such a glaringly obvious design flaw, whoever designed it should be slapped silly in the face. I'll address the mounting flaw first. This Stleathbox requires drilling a 1/2" hole through the passenger side fender well. Which is fine, that's not a big deal. You then have to mount a "threaded bolt" through that 1/2" hole. The Stealthbox slides over that thread bolt and then you bolt the box to the fender well. The problem is, JL Audio installs a "threaded" insert on the Steathbox! It's impossible to thread the box onto that bolt. I actually had to drill out the threaded insert, which was a complete pain. Second flaw, was my brand new box actually shipped with a bad speaker. I paired my sub with a JL Audio XD300/1. After much trouble shooting I narrowed the problem down to a bad speaker. Crutchfield shipped a brand new one, I got that hooked up and the box sounds absolutely amazing in this small car. If I didn't run into those problems, this sub would easily have been 5 stars.

Pros: Amazing sound quality, near perfect carpeting match, and nice build quality.

Cons: Huge mounting design flaw which requires drilling out an insert on the box. "Brand new" box shipped with a bad speaker.

Crutchfield response on

12 of 12 found this helpful

BASE ST ADD IN

Josh S from El Paso, TX on 10/6/2014

2013 Ford Focus

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

This sounds great. Enclosure seems very well built. I Havent bought new technology subs since about 2001 and Im impressed. Im using a Precision power I450 with it with the gain at about 60% w/ the remote. I was worried about the shallow mount (my 1st) producing, but this is as loud (but clearer) than the audiobahn 12 in a ported box that had in my last car. Put it in at work (car dealership service) and alot of people came over to hear it and were really inpressed too. I can actually feel the spl pressure if I turn it up

Pros: sounds great, loud and clean even when turned up. great enclosure.

Cons: alil expensive but you get top quality stuff. only uses 1 big bolt to mount while the 2 factory sub mount studs are right below it (dont know why they didnt use those for extra support, it would have made marking the hole for the bolt alot easier too since they wouldve put the box exactly where it needed to be.)

Crutchfield response on

13 of 14 found this helpful

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Cons:

Crutchfield response

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More details on the JL Audio Stealthbox®

Pat M.

Product Research

Features

Overview: JL Audio's SB-F-FOC5DR/10TW3 Stealthbox has been specifically designed to fit select 2012 - up Ford Focus 5-Door Hatchbacks. It features a single 10" 10TW3-D4 subwoofer in a custom sealed enclosure that mounts in the passenger side rear cargo area.

Note: Use our online vehicle selector to see what products work with your vehicle.

Subwoofers: The JL Audio Stealthbox's 10" 10TW3-D4 subwoofer offers a powerful combination of a shallow mounting depth and high excursion capability, producing deep powerful bass from a small enclosure. The dual 4 ohm voice-coil subwoofer is wired for a 2 ohm output to a single set of terminals, and is capable of handling up to 400 watts RMS. A black steel mesh grill is included for protecting the subwoofer.

Enclosure: The Stealthbox enclosure is made from fiberglass coated in black carpet and is designed to mount in the passenger side rear cargo area.

Note: Installation requires permanent modification of the cargo area floor. This model will not fit in Focus 4-Door Sedans or ST models.

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Customer Q&A

4 questions already asked

Q
I have a 13TW5v2 that I want to install in this box. Will it fit? Will it work properly?
[ johnbowler  Apr 09, 2019 ]
1 answer
A
I won't tell you it's impossible but it would definitely require modification as that is a 13" sub you're trying to put in a 10" enclosure. JL doesn't provide the specs for the internal volume or depth as it's meant to be a self-contained unit. You can connect with one of our product advisors if you have any additional questions or want to discuss alternatives: https://bit.ly/2QNxGQB
[ Cosmo  Apr 19, 2019 ]  Staff
Q
Where does the amp mount for this(I realize I have to buy one separate)? Am I stuck trying to hide it under a seat up front?
[ ccap41  Feb 02, 2017 ]
2 answers
A
If this is for the focus ST, I cut out the bottom of the foam next to the spair tire and mounted a kicker amp to the floor. I ran the wires along the passenger side doors to the back.
[ MICHAEL  Feb 06, 2017 ]
A
Youcan put it wherever you want. Under a seat or in the trunk or on the back of a seat in a hatch or back with the spare tire
[ kyle  Feb 03, 2017 ]
Q
Does this sub enclosure only come for one side? Or is able to be left and right for a dual setup?
[ Daniel  Aug 20, 2016 ]
1 answer
A
Thanks for your question. This custom fit item only fits the passenger side. Hope that helps.
[ Kenny  Aug 20, 2016 ]  Staff
Q
can i buy this custom enclosure without the subwoofer?
[ peter  Jul 08, 2016 ]
1 answer
A
Thanks for your question. There is no empty enclosure available for purchase. JL Audio has it as a package to best match the sub to the dimensions/volume of the enclosure. I'm sorry if it's not the answer you may be looking for but hope that helps.
[ Kenny  Jul 08, 2016 ]  Staff

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