I have had an rDac for about 3 months now connected to my pure i20 iPod dock via coax, it had been running fine until a couple of weeks ago while playing it suddenly cut off. The green light was still lit on the front but the input select button was unresponsive. A simple power on/off resolved the issue, but it has done it several more times since with no pattern, sometimes it will play fine for hours other times it will cut out after several minutes. Each time I have to disconnect it from the mains. I have emailed Arcam about the problem but just wondered if anyone else has had a similar issue before I take it back for an exchange.