Do you have a link to where you purchased it?
Galvanic isolation revisited.
Even using two switches and an Etherregen between router and server, inserting a EMO Isolator between Etherregen’s B side ethernet link to the server in my case brings substantial benefits. Likewise galvanic isolation between server and DAC on the USB link (I use an Intona Isolator) is indispensible. Given the Etherregen’s moat and modern DAC’s noise reduction circuitry I find this surprising. But obviously RMI/EFI and ground level noise intrusion in densely populated areas is difficult to fight.