MuxLab 500552 Dante 2-Channel Analog Audio Decoder - up to 328 Foot via CAT6 /6A
Amazon.com: Analog Audio Extender RCA 3.5mm Stereo Over Ethernet Single Cat5e/6/7 Cable up to 1475 Ft (450m) Converter Adapter Support PCM Stereo POC(Power on Cat) : Electronics
Vanco Digital Audio over Cat 6/5e Cable Extender Set 280531 B&H