I bought this little gadget that is intended to fit between a USB A connector end it's destination but have read that it will help at the source end as well. I bought this to go between a HDD USB cable and Oppo 103D player but have only tried it between my Bryston BDP-1 player and flash drive.
The BDP-1 is a well built and highly regarded unit so I was not expecting much in the way of improvement but I was very pleasantly surprised with the 'new' sound. Some female vocalists that I just avoided because of the cringe-worthy screech were now listenable, even enjoyable and well recorded and produced files were enhanced to the point where the sound seemed more relaxed yet very informative.
I get the impression that there has been a lowering of the noise floor where sound stage depth and width is more convincing and overall a more immersive experience is had. It's a case of more there there. Still to try it on the Oppo
https://www.underwoodhifi.com/produc...r-usbe-perfect