12" (300mm) car audio bandpass subwoofer box




Injection-molded polypropylene cone

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

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.

Acrylic window

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.

Durable construction

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

General Specifications

Description 12" (300mm) bandpass subwoofer enclosure
Woofer 12" (300mm)
Power Handling 300W RMS, 1200W peak
Sensitivity (@ 2.83V) 93dB
Frequency Response 45Hz – 130Hz
Impedance 4 ohms


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

What's in the box?

  • 1 x Bandpass subwoofer box
  • 1 x Owner’s manual

Documents & Downloads