Where does the DAC go?


Noob to digital audio.

I have a ROKU M1001 hardwired to my ethernet connection and for output I am splitting the 1/8" mini into two RCAs which go into the amp input. Streaming radio only, no computer involved.

Where, if anywhere, would a DAC go into this setup?
2k95aero
I am under the impression that a DAC would essentially result in better sound.

But then I saw in the ROKU specs that there is an internal DAC...so that validates Kr4s response, i.e., I don't need/can't use an external DAC...correct?