The 91.5 cm high X-Tension Kit is inserted between the subwoofer and Axon-12x3 to raise the column to a visually appealing height. Speaker cables can be elegantly routed through it. The mechanics allow a quick and uncomplicated assembly. The X-Tension Kit can be mounted on any subwoofer or steel base plate with an M20 thread. The Axon-12x3 carrying bag can be used to transport the X-Tension Kit.