Those two items on each side of your head will be the guide as to how loud you can go with the sound. Your room will also dictate this and whether you're listening alone, what time of day/night you are listening, etc. If you plan on listening into old age as I am, then don't go overboard on the volume control!
What is the proper loudness for listening?
Paul McGowan via YouTube claims that each room, system and recording has a specific sound level at which music sounds most "real"
I've noticed this myself listening to my 3 different systems set up in differing rooms. Thought I was crazy to think so but I guess maybe I'm not?
Also, have notice in smaller listening rooms that lower maximum volume levels sound more real. Going too high on volume in a small room just overloads it and results in distortion
Any comments?