The ZonePRO 641m offers fixed I/O pre-configured architecture configurable insert processing and optional duplication of audio channels to another ZonePRO device via a link bus.>br />>br />The 641m features a total of six inputs and four outputs. Inputs include four balanced mic/line switchable terminal block inputs and two mono-summed pairs of unbalanced RCA inputs. Hardware-controlled microphone gain allows adjustment of microphone gain per channel.>br />>br />The 641m device has a pre-configured architecture with input processing a central matrix and output processing. Two input insert positions and one output insert position allow channel-specific insert processing to be configured. AutoWarmth® a psychoacoustic function that maintains full frequency bandwidth even when the signal level has dropped is permanently available on each output zone.>br />>br />A link bus allows duplication of the first six audio channels to another ZonePRO device in applications where additional