It is specifically engineered to "soften" driver surrounds and stabilize mechanical junctions between the spider, cone, and voice coil.
: Slowly increase the volume while watching your woofer cones. They will move significantly even at low noise levels. Avoid Bottoming Out Magic Cd Jean Marie Reynaud Flac
: Noise centered on 500 Hz to stress the driver cone and stabilize the mechanical junction between the spider, cone, and moving coil. It is specifically engineered to "soften" driver surrounds