Soundstage depth and width

Not only active components but cables too.

Live acoustic music is performed in three dimensional space as far as I know so it certainly is part of the music. Studio recordings vary in their spacial arrangements. And electronic music can have depth or not whether is live or studio.
Also, silence is just as important part of music as sounds. It too can be either flat or not.

I wouldn't say that "the rest is easy" but perhaps a little easier or at least no more difficult.

Ebm, thank you for reminding us what you have. But what do you think of what we are talking about?
Mrtennis, you are alone here, with the dictionary. Perhaps you just don't quite understand the concept or simply need to remain argumentative.
Orpheus10, not to disagree with you, but I think you are a little too categorical in your statement. Highest achievements are difficult to reach in every component of music reproduction. But you might be right, I don't know.

Yeah, forget about big orchestras. They are too much even for a big concert hall in the first place let alone re-create that.