I have the Stax SR-507s and will get the Stax SRM-323 S. I'm NEW at all this. I have a late 2012 IMac 27 so will be using the "headphone out." 1. Do I keep the unit on all the time or do I shut it off at the end of the day when I'm finished? 2. Should I keep the volume low on my IMac when turning on the unit or would that not make a difference? 3. Do I connect the RCA jacks to the left (white) and right (red) input terminals? 4. Can I keep the ear speakers continually plugged into the unit? 5. If I have a damp head, can I be electrocuted when putting on the ear speakers connected to a live unit? I plan on getting a DAC at a later time. Please let me know if if would be more advantageous to post this in another section. Any help would be APPRECIATED.