Here is another product I've been working on during last year : high performance USB+LAN Ground Conditioner
It is quite unique - I have not seen anything like it.
I remember the first time I connected it to my USB Card FEMTO & NET Card FEMTO, I was shocked. The first thing I noticed was how much better the image quality got on my plasma TV, which was unexpected as the TV is not even connected to my audio PC, but it seems that my Audio PC, even though equipped with linear power supplies and good power cord, injects large amounts of noise back to the AC which is then spread to other components. Other than the image quality, the sound of my system reached a completely new level: more details, more natural, smooth highs, bigger soundstage and the feeling that the music is real. This is one of the most significant and immediate improvements I've had the pleasure of hearing in my system.
The product is available at the JCAT webshop where you can also find more details about it: https://jcat.eu/prod...nd-conditioner/