Component contributions to “sound stage”

1. Get thee an inexpensive SPL Meter combined with a CD (not LP) with Test Tones (I use 'Amazing Bytes' (a few on discogs now). Use tools 1st, then adjust to personal preference.

2. refine Speakers Location and Toe-In for that space/listening position(s)

3. Vinyl: Cartridge Choice: Prior to sound 'preference' choice:

Wide Stereo Separation and Tight Center Balance specs effect imaging tremendously.

4. Balance refinement, remote balance preferred. A small balance tweak can make a large improvement in imaging.

The least contributing component is usually the disconnected component.

The rest of components contributing pretty much equal with speakers doing usually more than rest.

Czarivey, even on Thursdays?

Have you noticed that sometimes when an OP asks a serious question, a difficult question, many of the responders poke fun because they can't provide a thoughtful,  experienced response.

In my experience regarding soundstage,  speakers are the most significant contributor, but that can be altered by source, amplification, room, etc.

Soundstage is recorded on the source.  So look for components that reproduce the source most accurately.