iFi LAN iPURIFIER PRO - Optical Ethernet Noise FilterLAN iPurifier Pro Pure Network. Pure Sound. The LAN iPurifier Pro removes electrical noise and interference from your network, letting streamers, DACs, and media devices perform at their best. Using Optical Galvanic Isolation, it fully isolates your audio system from router and switch noise, regenerates the signal, and reduces jitter for cleaner, more natural sound. Just plug it between your router and network device no setup, no complexity. Upgrade