(approx) 2 Hours
Simple installation for anyone.
$879.99 (each)FREE Shipping
Features, Description, Reviews, Q&A, Specs & Installation
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October 21, 2019
some modification required
sounds good, fits well but I had to enlarge the holes to get the mounting studs to line up. Grill keeps falling off, I just put some clear silicone on it to see if that will get it to stay on. At this price I should not have had these issues. shipping was super fast from AM.Helpful (2)
August 31, 2019
I will say the reviews I read about the install were dead on. This is not my first stealthbox and must say I was very disappointed in the difficulty with the install. It was impossible to get the box on as described in the instructions. I followed what others did and threaded the bolts front m inside the box. My other issue is there was a lot of leftover fiberglass around the mounting holes inside the box. I had to use a disc sander to clean up the inside just so I could get the nut on. IMO this box cost way too much money to have these kind of issues. Once you get the darn thing in it sounds as you would expect a JL sub to sound no complaints there.Helpful (4)
August 25, 2019
Awesome JL Audio
Great investment for your 2019 mustang gt and the sound quality is awesome a bit pricey but good product..Helpful (3)
June 18, 2019
Great Sound, Custom Fit!
Well I was hesitant to buy this at first, but after seeing one in person, I had to buy it. Looks better than the factory installed sub and sounds a lot better as well. Best option not to lose a lot of trunk space. If they made one for the driver side, I would buy it as well. Solid build quality.Helpful (1)
June 26, 2018
Great sound and fit
amazing sound from this unit. complete factory look and still have space in the trunk!Helpful (17)
June 13, 2018
Great product and service. The product fits perfectly in the mustang.Helpful (13)
May 29, 2018
Boom Boom Boom
JL Audio delivers again and again. It's not too much bass but enough to give you that car rattle if you want it. Nice compact deep full sound. Be sure to pair a good amp with it.Helpful (12)
April 26, 2018
I love this sub and I love the fact that it opens up my trunk space. the only issue i've had with it is the speaker grill will vibrate loose and fall off and I have to keep putting it back on. I'll look to see if i can find a better way to secure it. But Overall It sounds great and fits perfectly I'd definitely recommend it to anyone looking to add some bass to their mustang. Also I'm using the factory stereo which I upgraded to sync 3 myself and an Alpine mon amp to power it.Helpful (20)
if you don't have the factory sub in the car already, will this still work? or is it only to upgrade the existing one.
This Stealthbox Subwoofer Upgrade Kit is a replacement unit however it can be installed into a vehicle that does not have a factor subwoofer with a little wiring.
According to my local Ford dealer the factory sub box is the same part number for the fastback and the convertible. Why won't this one work for a convertible if the factory box is the same for both?
The enclosure used for the JL Audio Stealthbox Subwoofer Upgrade Kit is larger than the OEM sub enclosure and will not fit into the convertible's trunk properly due to clearance issues.
Is there a sub woofer included? if not does the subwoofer need to be a shallow sub or will a rgular fit too?
Yes a subwoofer is included.
Is there a factory amp that will work with this if you did not have a factory subwoofer? I see it states you need speaker wire in other questions but do you need an extra amp? Does it come with instructions on installation and wiring for those that are not replacing a stock?
If your vehicle did not come equipped with a subwoofer, you will want to install a subwoofer amp. Also, if your stereo doesn't have pre-amp outside you will need one that does. You can find the installation guide for the JL Audio Stealthbox Subwoofer Upgrade Kit at the link below. https://lib.americanmuscle.com/393861-manu.pdf
Why the new picture remove the speaker grille compare to other speaker/sub/amp combo?
If you have a Mustang that was not equipped with a factory subwoofer, you will need additional speaker wire to install the Stealthbox properly, on top of a few modifications for proper fitment and installation.
This would work in the Mustangs that do not have the OEM sub, however, you would need additional speaker wire to install this properly.
The JL Audio Stealthbox Subwoofer Upgrade Kit is a true Plug-And-Play Unit if your Mustang was equipped with the factory subwoofer. If the vehicle was not equipped with the factory subwoofer, you will need to modify the wiring.
The Stealthbox Subwoofer Upgrade Kit is an upgrade for the factory subwoofer. It is not available in a Driver's side configuration.
The subwoofer upgrade kit is designed for 15-18 Mustang fastback models and will not fit the convertible model. Unfortunately at this time, we only offer an upgrade kit for the fastback models.
The Stealthbox Subwoofer Upgrade Kit will not include an amplifier, and will reuse the amplifier from your stock subwoofer, or will be able to handle up to 400w (peak) aftermarket amplifiers.
(approx) 2 Hours
Simple installation for anyone.
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