PM351 Personal Monitor SystemThe PM351, like its predecessor the PM350b, is a personal monitoring device with a 1 4" TRS stereo mono Line Input,a single XLR Microphone input and hard wired XLR pass through, and a 1 4" stereo mono Instrument input with two transformer balanced and isolated XLR Outputs. All three of these inputs are also routed via individual Level controls, to a 1 4" and an 1 8" (3. 5mm) Phone Output. The Mic Through, and Instrument outputs have jumpered Ground