kenable Audio Sender Over LAN Cat5 Ethernet Cable Phono RCA Extender 150m [150 metres]: Amazon.co.uk: Electronics & Photo
EXT-AUD-1000 | Audio Extender | ITM Components
Digital Audio Extender Over CAT5/CAT6 Cable Kit With Optical + Coax SPDIF Inputs | eBay
Digital Audio Extender Over Cat5 J-Tech Digital
Amazon.com: Digital Audio Extender Digital Optical/Coaxial Digital Audio Extender/Converter Over Single Cat5e/6 Cable (PoC) up to 500' Standard Supported for LPCM, DD5.1, DTS, and D True HD : Industrial & Scientific