I've just received this isolator, and connected to "filter" the usb output:
PC-usb XP - Jriver MC22 >> this isolator >> Musiland usb-spdif >> Sabre DAC (TP Bufallo II out transformers)
I'm running 16/192kbs Jriver upsampling from 16/44kbs
I can say the sound is greatly improved ! ! !
Thanks to Hifimedy
This was the one I was waiting for; I have a Steinberg UR44 that produces a bad hum when connected to a laptop and an amp with a 3-pin mains connector. Solved! Nick was kind enough to send me a beta model, thanks, great job. Recommended for any high-speed application.