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It is also possible to operate an MPX-6 from a graphics plate. Please refer to the Graphics Plate Operation Guide for additional instructions. Printed on recycled paper. IQ-MSD 12/94 MPX-6 Mixer/Multiplexer Operation Guide ©crown 1 The MPX-6 The MPX-6 is a 6x2 mixer/multiplexer with six mic/line inputs, two main line-level outputs and two switchable bus outputs. Under computer control, it can switch the inputs on or off, control their levels, route them to two main and two bus outputs. Mu