I use my 2 ears and when a recording locks in, it is easy to hear, after that you ruin it if too loud or soft. Peter Walker said it best, every recording has a correct volume where it will sound its best.
Overdrive your room then you hear distortion and sound bouncing around your room. Train your ear by listening, and as a musician said to me once play the music as if that person or instrument was in your room, no more no less that is about what Peter Walker said who design the world-famous Quad Electrostatic speakers.