Thought I'd share my personal experience. I had a serious grounding issue with my old Asus PC. Heavily distorted sound when streaming from the USB output into an Accuphase DAC 40. When connecting headphones directly to the sound output of the PC I could hear the same issue. I tried an IFI micro iUSB.30 to no avail. The Intona 2.0 did the trick. The noise was gone, totally silent. Therefore I am a bit puzzled that Amir had trouble recreating such a hostile invironnment. In my case I also ended up investigating further. I bought a new power supply from Asus and the Intona was no longer needed. An expensive product Intona, but ' it may come in handy in some cases.