The content of the question can be found in the E50 manual on Topping's HP.I ordered this dac and the PA5 amplifier.
I forgot the fact that I would like to connect a subwoofer later on. Is the E50 capable of output signal in both balanced and unbalanced at the same time in preamp mode? That would solve it for me.
If not I would be happy for other suggestions on how to solve the connection of a subwoofer.