As a woofer moves forwards and backwards its effective surface area changes causing distortion, the surrounds (spikey things) on the woofers of Purifi Audio works to maintain a consistent surface area during movement. Personally i find them mesmerizing.

As a woofer moves forwards and backwards its effective surface area changes causing distortion, the surrounds (spikey things) on the woofers of Purifi Audio works to maintain a consistent surface area during movement. Personally i find them mesmerizing.