Component contributions to “sound stage”

I have a CD that is produced specifically to test the placement of your speakers.  Sorry I can't give you the name as I'm not at home for a couple months.  This recording consists of a dozen tracks with explanations of what instruments you are hearing and exactly where you should be hearing them.  It's proof positive that the sound stage is in the recording.  Sure your equipment can play a part in the enhancement of the sound, but you can't reproduce something that's not there to begin with.  Since the recording is designed to maximise speaker placement, it would stand to reason this is the place to start?   

Very good question...

I would say speaker placement (back wall, rear wall, toe in/out) seating position are probably the most important. Of course, recordings and components all contribute to soundstage.

The recording.

All your components and the recording.

@mazian  +++
The soundstage is created by the RECORDING ENGINEER when the recording is being MIXED.  If it’s not recorded onto the source recording in the sources, digital source nowadays, no equipment  ie. media playback equipment, at any cost, will create one in your room. 
YES. Speaker placement in the room is very important. Toe in, distance from sidewall and back wall, and ceilings, acoustics treatment, all play, a role in creating a soundstage. if you don’t get it right, you won’t get a soundstage.
Again…No matter what, you won’t get a soundstage, if it’s not on the source media!  
There was a thread just a couple of days ago that reviewed this topicl.
Bent