Component contributions to “sound stage”

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

Now I am only going by the numerous posts that have made this claim, but it would appear it's the power cable attached to your conditioner or amp.  🤣

As mentioned, the soundstage is in the recording. The components either reveal or obscure that to some degree, so they all matter.

If we talk about power-cord, than the most contributing component is hands down -- power line.

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

This is true but misleading...

There is a recorded album acoustic trade off choices by a recording engineer,yes, and  to convey it without too much loss by a dac and amplifier is one important thing yes, but to translate this reproduced set of bits and electrical impulses in your room ask for a speakers /room tuning and controls...

And the impact of speakers/room controls in the soundstage and imaging creation comes from the huge impact of the pressure distribution zones of the room , the position of speakers/listeners, the timing of waves, the reverberation control, the balance between reflection-absorbtion-diffusion , etc...

Acoustics rules the gear and his experience from design to listening not the reverse...

Soundstage and imaging are acoustics concept not gear design concept...