A good deal of it is resonance control. Everywhere. Some is mechanical and some is electrical. If you ever experience ringing from a transformer or other such device you'll understand that removing those echos reveals more of what is or isn't in the recording. Even speakers mis-placed can cause this kind of interaction at the listening position.
What does it take to have a revealing system?
I have to heard it said that a system is not revealing enough for a certain component to really show off what it can sound like.
What does it take to have a revealing system?
What does it take to have a revealing system?