The PMC Loudspeakers XB2 Passive Subwoofer features line design and driver technology identical to that of the MB2 and MB2-A, forming a perfect blend of
dynamics and depth of bass required for the most testing of material.
In addition to the conventional rear vented magnet it uses the
patented, front mounted Radial™ chassis, which acts as a giant heatsink.
This keeps voice coil and magnet temperatures exceptionally low
resulting in superb reliability, 3dB less power compression and tight. The XB2's unique 12" Radial™ driver features two cooling systems.