Received mine today and in a word (or two) "IT WORKS".
Immediately solved the ground loop issue I've been having with my iMac to USB external sound card to a single-ended triode (tube) amplifier.
This device is invaluable. It's very impressive. We were plagued by USB hiss and hum (set up is Linux / UBUNTU Studio / Quattro USB2 external sound card).
This isolator slashed all our noise - it's brilliant!
Top product, a must have for home recording setups. There is now a newer version with a better spec, which we'll be getting soon I suspect, but this one have saved the day already. Quiet audio train at last. All good.
Very happy. No more USB ground loop through my M-Audio Fast Track Pro. My monitors are now silent. Ahhhh! :D
If you live in a country that has old 2-phase electricity grid with no proper 3rd grounding line, you NEED this. Applies to most eastern-european contries. It eliminated all my parasitic noises coming from the PC due to the poor grounding. Using it with PC > ODAC > Headphones/Active Monitors and it works like a charm.
I got this from amazon not exactly for a dac, but for Kef X300A that has an integrated dac. It works fine on 24bit/96Khz