Green-GO GGO-Q4WR Quad 4-Wire Audio InterfaceGreen GO Quad 4 wire Interface. The Green GO Quad 4 wire interface can connect any 4 wire analogue system to the Green GO network. A 4 wire port consists of a pair of 3 pin XLR in and output ports with a Sub D9 connector for general purpose in and output for contact closures. This allows separate audio signals to be injected into and extracted from the Green GO network All ports can be configured individually through the setup menu of the Green GO