Supratek Cortese inputs/outputs - need clarification

Any input that's not a phono input is a line level input, suitable for CD players, Dacs, basically any component that outputs a line level signal. Which is most components that are not record players.

I see, so i can use those for either CD or piano, they have the same impedance, is that right?

And what about the outputs, I see 3 of them, same as well?

Thank you

Multiple outputs on any preamp is used for adding another amp or a subwoofer!