If you’re happy with your amp, then you can rely on the DAC in the Pro Plus or Ultra to do a good job into it over RCA.My next question concerns connecting the streamer to the amplifier.
Currently, I can only use an analog RCA input, as my existing amplifier doesn't support anything else.
Would it be better (in terms of sound) to use an amplifier with HDMI and/or optical inputs and use one of the two inputs accordingly?