All inputs and outputs are balanced transformer isolatedExtremely reliable: Should one output be shorted, the other outputs remain unaffectedLine input and outputsAdjustable input gain (-8 to +25dB)Level meterHeadphone output to monitor the input level, headphone volume adjustableIndividual ground lift switches for each outputGround Lift switch for the inputExpandable setup thanks to the Bus In/Out sockets - allowing you to cascade numerous PPB10 (or PPB20)