The PPB10 Press Patch Box from Palmer is a 10-channel audio splitter which functions on a transformer-split basis allowing one line input to split out to ten outputs. If one output shorts, the other outputs will remain unaffected, making the Press Patch Box a durable and reliable line splitter. The input gain is adjustable from -8 to +25 dB and all of the inputs and outputs are balanced-transformer-isolated. There is a level meter, an adjustable headphone volume and the headphone output monitors the input level. Individual ground-lift switches and a ground-lift switch for the input reduce ground-related noise while the signal lines are connected. The bus in/out sockets enable you to stack many Press Patch Boxes, expanding your setup.