4.8 (11)
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GT-12BP Injection-molded polypropylene cone - Image

Injection-molded polypropylene cone

The polypropylene woofer cone in the GT-12BP is engineered for superior rigidity, reliability and sensitivity. The result is increased low-frequency output and powerful, natural-sounding bass.

GT-12BP Slot vent - Image

Slot vent

The GT-12BP’s enclosure is vented, which enables the subwoofer to deliver ultra-low bass at higher sound pressure levels than a sealed enclosure.

GT-12BP Acrylic window - Image

Acrylic window

Some subwoofers are meant to be seen as well as heard. The GT-12BP features an acrylic window shaped like the JBL exclamation point and orange illumination, so you can look into the enclosure and see what legendary bass looks like.

GT-12BP Durable construction - Image

Durable construction

The GT-12BP bandpass enclosure doesn’t just produce signature JBL bass performance, it protects it. The rigid box keeps the woofer safe from anything that might slide around in your trunk.

Specs & Downloads

Item# GT-12BP


Some car audio fans love the clarity of sealed subwoofer enclosures. Others crave the added power of vented enclosures. The GT-12BP bandpass subwoofer offers both. It delivers accurate bass response and thundering power—as well as a bold look. The stylish box features a look-in acrylic window shaped like the JBL exclamation point, making the GT-12BP as appealing to the eyes as it is to the ears. And the sturdy enclosure shields the 12-inch polypropylene woofer from items that might shift in your trunk. The great value GT-12BP proves you don’t have to spend a fortune to enjoy legendary JBL bass.

General Specifications

12" (300mm) bandpass subwoofer enclosure
12" (300mm)
Power Handling
300W RMS, 1200W peak
Sensitivity (@ 2.83V)
Frequency Response
45Hz – 130Hz
4 ohms


Dimensions (L x D x H)
18-3/4" x 16-1/4" x 15-3/8" (475mm x 412mm x 390mm)

Documents & Downloads

Reviews and Q&A

Customer Reviews

Rated 5 out of 5 by from Great sound A friend bought one.An it made me purchase one awesome sound has built quality products for years Harmon has been building sound equipment for years which is JBL .an there quality can't be beat
Date published: 2016-12-16
Rated 5 out of 5 by from Great sound with highs and lows I bought 2 of these about a year ago and they are great in my 2000 Ford Expedition. I paired these with the JBL amp and they are exactly what I wanted when I was looking for in bass for my EDM.
Date published: 2019-11-16
Rated 3 out of 5 by from Well bought this for my 2013 altima about 2months ago the sound quality was amazing with rock music or hip hop over all quality is very nice but I fried the sub needs more rms my pioneer amp was rated a little high at 350 rms but never expected to fill the box with smoke I would not get it again i like a little more bang for the buck so my opinion sound quality is at least 4 star but rms is lacking
Date published: 2018-12-01
Rated 5 out of 5 by from F%$# yes yes yes He## $%^#ing yes, ..He## $%^#ing yes, ..He##& $%^#ing yes, ..He## $%^# ing yes
Date published: 2022-02-17
Rated 5 out of 5 by from Love the sound Sounds amazing and love the design jbl is an outstanding product
Date published: 2017-03-22
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Product Q&A

I was debating on buying either the GT-12BP or the S2-1224SS which one produces a better lower bass.

Asked by: Alexcondeac
The S2-1224SS has the better lower bass.
Answered by: Steven M
Date published: 2021-06-06

Would this sub fit in my 2013 nissan juke?

Asked by: J3SUS1990
The JBL GT-12BP bandpass subwoofer enclosure can fit most trucks and compartments. It has a dimension of (L x D x H)18-3/4" x 16-1/4" x 15-3/8" (475mm x 412mm x 390mm). To accurately determine if it fits into your car, it is best to measure the space that you have available versus the dimension that the unit has. 
Answered by: Paulo C
Date published: 2021-06-06

I have a GT-12BP but I dont have the wiring for the interior lights. Is there any way to buy a replacement cord?

Asked by: Aidenack
We don't have stocks left for the wiring, but you can still get these from 3rd party installers like Crutchfield, etc.
Answered by: Homer DLR
Date published: 2021-06-06

Will this fit into a 2017 Camaro? Trunk Opening is kinda narrow 

Asked by: Jayday
If the trunk opening in your vehicle has more than the following dimension: 18-3/4" x 16-1/4" x 15-3/8" (475mm x 412mm x 390mm), then the JBL GT-12BP would fit in it.
Answered by: Rhae
Date published: 2021-06-06

Do I need to buy an amp for this enclosure? If so what amp would work with this enclosure?

Asked by: poarchie86
Yes, an amplifier is required to power the GT-12BP. Connecting it directly to your head unit that may have a built-in amp may work but would not have enough power to maximize the potential of the GT-12BP. This subwoofer can handle up to 300W RMS of power @ 4-ohms so the GX-A3001 that can drive up to 200W of power would work great with these. Other mono amplifiers are available at but most would drive more than 300W @ 4-ohms, which can still be used as long as you do not crank the volume to max all the time.
Answered by: Ren at Customer Service
Date published: 2021-06-06

I have read three descriptions about illumination light. Orange, Red, and White. Explain as I personally would like red.

Asked by: Anonymous
We would like to get more information to help you out, please contact us so we can assist you:
Answered by: Mario at Customer Service
Date published: 2021-06-06
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