Hi Ted @tedsmith
When it comes to group loops and dirty USB source noise and leakage currents etc, how important is galvanic isolation of the data line/s compared with power and ground?
Is it the power and ground lines that are usually the culprits?
I did read where you said a noisy power line can affect the data lines if they are in close proximity.
If you can isolate the noise power and ground lines (and leave the data lines alone) then does this cover most of the issues with USB for audio?
The reason I ask all this is to consider a chain like: LANRover (to travel to listening room) > Corning USB (inside the listening room) > iFi iDefender 3.0 > Dac’s USB input
The iDefender breaks the ground loops and disconnects the noisy power , both of which may be carried via the Corning cable? And allows you to inject whatever clean power you like. And isn’t too expensive either - assuming it really is doing what is says of course.