After testing the PHA-3AC since yesterday I've noticed that no step to hear music about 2 hours. I light it up and the green LED is lit, the time starts to flash (if I have connected the power connection to the plug through the adapter provided by Sony) and finally the unit just fading as if he had finished the battery but the version "AC ".
The unit is relatively hot, it's like going off for security, can it be? Would you have gone? Turn it off 2 minutes, switch it on and steady green again. I'm using a MDR-Z7 with balanced cable and DSD files via computer and Sony Hi Res Player.