Built to perform under SPL competition conditions, this 12″ features a chassis designed for maximum thermal efficiency while offering 86 dB sensitivity. A paper/cotton cone is deployed to keep weight down while offering maximum rigidity. the dual 2 ohm voice coils ensure that a system amplifier is kept very much on its toes, while pushing the cone through 10.6mm maximum excursion. As always, Hertz has managed to keep this subwoofer sounding magically musical too!