Good Morning @wsrrsw ,
Speaking With ?Rich at Network Acoustics, he said many find the Ether Regen is not needed in front of the Muon Filter. He said try it, but that many found that a simple switch (not fancy) in front of the filter was good. I need the switch at my computer / modem / Nucleus / ethernet out to my stereo's and TV's and wifi system. I use the modem ports for some of it and I use the SA Bonn 8 for the audio part. Tell me what you like about the M12? By removing the Ether Regen from my main system, I lost the extra A port that went to my Apple TV (old Samsung does not have Apple TV on it) so I may need to add a switch anyway.