Meet the Eve Play: an AirPlay audio streaming interface that lets you stream music to your speakers, soundbars, amplifiers and other HiFi devices. It allows synchronous multi-room playback. It has a 112dB signal to noise ratio. It has coaxial, optical, RCA, and Ethernet ports in the back.
You can set this device up via your smartphone or Apple Home. Its Ethernet port allows for stable streaming performance.