Hello, I own a PS Audio GCHA, 220V version and I encountered an weird situation. Yesterday we had an electrical problem in our neighborhood, the electrical maintenance was there and I think it was a serious voltage drop (I did not know that at the moment) . I was listening music with my earphones when I heard some fast relay noises inside GCHA and the sound stopped, the blue led was still on. I have “shutted” the system off from volume knob, not the main power on the back of GCHA, restarted it and everything was fine. I encountered this situation two more times and after that everything was ok. Is there a problem with low voltage applied to GCHA ? It damaged anything or can it damage something inside GCHA ? The relay is some sort of protection, or GCHA have some LOW/HIGH voltage protection, or I was lucky not to damage the equipment ?