Agree with the advice above - not issues with using two inputs to the Pontus
However where I ran into an issue with the Pontus (which I love by the way) was in trying to hook up both outputs of the Pontus at the same time. I wanted to run RCA into my tube integrated and run XLR to a headphone amp. Even though I would have only used one output at a time, Vinshine confirmed what the manual said about not connecting both outputs at once. Beyond my understanding but something to do with output buffering I believe. My solution was to get a new integrated amp with XLR input with a good built-in headphone amp