upgraded from fx6 dac to the pro-ject pre box s2 digital and use it with my home brew music server. the server is a windows 7 desktop and a samsung tablet .i use the gizmo app on the tab and jriver on the pc and finally got it to work trouble free. the fx6 dac used the windows wasapi whereas the s2 uses the asio, i had to install the provided driver that was included in the s2 package,but there was a problem. the driver would not install correctly .i downloaded a newer version of the driver from their website and i also hung, the problem was that i needed the kb 3033929 update and i downloaded it from the microsof website as a stand alone and after installing it, the pro-ject s2 driver installed correctly and showed up in device manager fully functional. i hope this helps the new users of the pro-ject prebox s2 digital dac.my system has never sounded better.