last I checked Amazon fire was the best audio technology that supported the higher quality formats of the three. My Amazon fire TV sounds great via toslink to hifi system dac. I use plex on it to play from my music server. Performance is comparable to squeezebox touch and other hifi streamers.
I also have older roku sound bridges that I no longer use that used to be similarly good in their day with external dac. But roku jumped that ship to provide av streamers on the cheap to the masses that are just ok but with inferior hardware and software for streaming hifi audio formats.
I also have older roku sound bridges that I no longer use that used to be similarly good in their day with external dac. But roku jumped that ship to provide av streamers on the cheap to the masses that are just ok but with inferior hardware and software for streaming hifi audio formats.