The JBL GTO-1200B with a 12" 250 Watt RMS Subwoofer giving 1000 Watts Peak Power. This 300mm Bass-Reflex Subwoofer Box measures 455 x 440 x 360 (HWD in MM)

High-efficiency polypropylene woofer cones - This lightweight and popular cone material is used to ensure maximum woofer efficiency. The benefit is high output with modest amplifier power.


• Large-roll rubber surrounds - This material provides optimum cone-edge suspension and absorbs distortions that may travel up the cone edge. The benefit is reduced distortion.

• Progressive spider - Each GT4 subwoofer features a progressive spider, which provides better control at excursion limits than a linear spider. The benefit is reduced distortion at high output levels.

• Deep-draw I-beam basket - This provides room for a longer motor structure, which provides increased bass output. This basket is also more rigid and has a lower basket resonance. The benefit is lower woofer distortion.

• Vented polepieces - Additional cooling is provided to the motor structure. The benefit is that each GT4 subwoofer's thermal capabilities are augmented, increasing power handling.

• 12mm Linear one-way X-max and dual 1100 grams (2200 grams) magnets make this subwoofer a great choice for high output applications.

• Custom-tuned bass reflex systems acoustically optimized for the in-car environment.

• Precision-tuned for extended, powerful deep bass