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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

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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.

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

Vehicle-specific enclosures with subs? Say what?

Instead of the usual sub in a box, the manufacturer creates a molded enclosure that fits perfectly into a convenient spot in your specific vehicle, housing a high-quality sub. Some enclosures even include a built-in amp, for the ultimate in stealth bass. The advantages? You don't lose much space (if any), your sub is perfectly matched to its enclosure, and your enclosure has a factory look that won't tell potential thieves you have an awesome sound system. Doesn't get better than that.

JL Audio Stealthbox® Reviews

Average Customer Review:

3 Reviews

Stealth box

Written by: Anonymous from Martinsburg, wv on July 18, 2015

Crutchfield Customer Review (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.



Amazing Sounding Sub, Terrible Mounting Flaw...

Written by: Ghastlyone from Nevada on February 26, 2015

2014 Ford Focus
Crutchfield Customer Review (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.


Written by: Josh S from El Paso, TX on October 6, 2014

Crutchfield Customer Review (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.)

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