the difference is night and day ! i was using a dac that had no galvanically isolated USB input, adding the HS02 in the chain made an impressive change, i know electrical interferences can cause clocks to missbehave and add what is commonly referred to as "digital glare" but i was not axpecting such a change. anyway the device works and does wonders if you have a dac that is not properly isolated. Even my girlfriend was shocked at how much difference it made !