Looking for cable to output from either HDMI or optical to RCA. Optical requires power to convert but HDMI does not. Which is a better option for audio ?

Supported connections include coaxial and optical digital as well as RCA connectors, and Eve Play can network over either wifi or Ethernet for audio streaming stability.

The TV has a TOSLINK optical output. My NAD amplifier (C325BEE) does not have any optical inputs, only RCA. What is the best way of linking this up? Is there a TOSLINK to RCA cable out there?