Wilson Benesch Torus Infrasonic Generator Brochure (pdf)
No spider, No carriage and No stiff suspension, and operating in push-pull the Torus is not a sub-woofer. The Torus is totally unique and meticulously engineered. The 18 inch diaphragm is propelled at incredible speed between two coils located on the massive Core. The diaphragm is return to neutral position electronically not by using heavy and stiff suspensions.
In the Torus the rear energy is directed downward through the core into a massive steel bass and then into the floor through the large integral spikes. The cabinet resonance is minimal.