On my own journey to improved acoustic performance, I added a EtherRegen switch between a Roon Nucleus and our 818. The trial period expired before I decided I didn't like the sound - it just seemed harsh (with noticeable ear fatigue after a bit). With Bruce's assistance, I then added an ENO AG filter and cable between the ER and 818. Wow. Substantial improvement across the board. I admit that I was skeptical (bits are bits), but hearing is believing. (But I would still like to know what is happening in that little box to make the improvement.) I am now intrigued by what the M-specific filters hinted at on this thread will bring to the party.
John

Last edited by Vorticity; 2021-06-22 15:52.
Main: 861v8, 818v3, 8000XE, 7200HCUSE, 7200.2, Roon Nucleus+, Shunyata Everest w/ Sigma XC and Alpha NR's, HD621, Oppo 103D, Panasonic P60ZT60 plasma. RJ45 switch on master SpeakerLink lines to select 861 or 818, Etherregen & ENO AG feeding the 818, M-Links.
Room #2: 5200.2s from M218.