Hi Again Guys,

Well then, my original post has stimulated quite a debate. Most of which goes straight over my head!

In the meantime I've contacted Qnap support and they've asked which firmware version I require to rollback too. I can't remember nor can I find reference to earlier firmware on the machine. So, which firmware version does the forum think would be most suitable with my TS 453A and when I've got an earlier version what do I do with it to make it all work again?

Regards

Paul

C15, QNAP TS-453A, Synthesis A100T Tube amp with onboard DAC, Triangle Antal Anniversary Edition