Any audiophiles on the Board will have noticed how in recent years one has to turn music up past its comfortable level to get a decent balance of sound.
Do not feel that this is your imagination, it is not. It is by design and designed to suit the ears of young people who think that loud sound is better sound.
http://funl.blogspot.com/2007/06/loudness-war.html
This link provides a simple explanation of what happens at the mixing and mastering stage of much modern music production.
HS