Moderation? What are you going to do when you need that extra push over the cliff? You need to put it up to eleven! One louder!
On a more serious note, is there a term to describe when all of the detail is recognized at a lower volume level? I do not believe it is all due to gain. My older amp seemed to have all of the musical detail at a lower volume than my current amp. I find that I keep dialing up the volume knob to hear things that I previously could hear at a lower volume.