Hello,
For a few months now I'm having this problem with my setup.
I have the Tannoy Reveal 402 monitors connected to the UX2 via unbalanced PL connection.
For the first few weeks I had the monitors, they worked great. Then, everytime I turned them on, the soundcard stopped working and crashed (no orange lights) and when I turned the monitors back off, the UX2 worked again.
I replaced one of the monitors for new Tannoy Reveal 402, and the same problem occured. Then I sent it for a fix and they did find something, but the problem still occurs. I emailed Tannoy about this problem and this was their response:
What do you guys think can be the problem? The UX2 can be on for hours but when I turn the monitors he crashes.