Black Finish Surface Box & Plate. Fitted with Speakon NL4 Connector. Available in 4 SizesDimensions: 86 x 86 x 45mm (1 & 2 Gang) 86 x 147 x 45mm (3 & 4 Gang). Speakon plate and surface boxes complete with Speakon Neutrik NL4 connectors. Available with different cable combinations.. speakon plate-speakon connector-speaker connector