VT-218 is super low frequency woofer, designed to support VT-312 Line array speaker system. It could expand the minimum working frequency of the supported system to 35Hz. VT-218 is consist of two pieces of 18" directed low-frequency speaker unit, horn low frequency design, extend the LF range, enhance the musicality, deep LF, excellent dispersion angle produce exciting and dynamic sound, with an unbeatable low frequency power. The box adopt birch plywood, sturdy appearance is able to withstand all kinds of friction and collisions. It can be used to the site that needs low frequency power complement, its the first choice of disco, large size performance.