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V-SUB is an active high performance heart-shape woofer, driven by a single channel amplifier, adopts complete hoisting deive, equipe with 2 long stroke neodymium drivers, including a forwarded installed 18 inches neodymium drivers and a backwarded installed 12 inches driver, heart-shape diffusion design, eliminate unnecessary sound power lose, effectively reduce echo area and reproduce LF signals. V-SUB could be used as an extension full range unit or other different combined types, such as stacking or hoisting, it can also be hanging over the top of V8 as woofer group.