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JBL Car Audio

JBL® GT-12BP Car Subwoofer Box

Model #: GT-12BP

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Additional Parts May Be Required:
Additional parts or labor may be required to complete the installation depending on year make and model

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Professional Installation Required

Built to order, Usually Ships in 2-4 Weeks

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Usually Ships in 2-4 Weeks

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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.




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.

Slot Vent

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

Acrylic Window

Some subwoofers are meant to be seen as well as hear. 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.

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.


General Specs

Manufacturer Warranty 1 Year
Width (in.) 18.75
Color Finish Name Black
Depth (in.) 16.25
Height (in.) 15.38
RMS Power Handling (Watts) 300
Mounting Hardware Included No
Peak Power Rating (Watts) 1200
Subwoofer Size 12″
Satellite Radio Ready No
Water Resistant No


Enclosure Type: Slot Vent


Maximum Power Handling: 1200
Sensitivity: 93 dB
Frequency Response: 45Hz – 130Hz


Color: Black

Additional information


Color finish name

Manufacturer warranty

Subwoofer size

Rms power handling (watts)

Peak power rating (watts)


Depth (in.)

Width (in.)

Height (in.)

Enclosure type:

Water resistant

Mounting hardware included

Satellite radio ready

Maximum power handling:


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