ifi LAN iSilencer

ifi is a very good company, they make affordable items, but they generally work very well and are of excellent quality - smart business people and excellent engineers/problem solvers

+1

I implemented this into my system and I had the same experience as the OP. I have this connected to my router prior to my Small Green Computer i9 Optical to Sonore OpticalRendu. There has been some debate whether this would bring an improvement prior to optical isolation. Well it worked in my case and it is staying put.

I tried a bunch included Sonore , uptone 

jays audio sells the SW 8 Thst has linear power supplies, low noise regulators 

and a Over controlled clock it is very respectable at just under $600 

and takes about 300 hours to fully runin , always use at least a pangea or better power cord , and the Synergistic purple fuse made it better still.

I have similar case upgrade on my modem and Wi-Fi router, it's upgrade the PSU iFi iPower-X for modem & router each. I can hear the music improvement on soundstage, airy, realistic. 😏😎