DaveyF's thread on 'Depth' made me think of another dimension in the soundstage - height, and if that is exclusively or mostly attributable to the speakers' height itself.
Having lived with mini monitors in the past (on stands), and then tall speakers like the B&W800s and now the Magnepan 2.7QRs, I have found out that very little amount of tweaks, cable swapping, tube rolling or amp switching can increase the soundstage height of my system, at least in a dramatic fashion. For monitors, I have found out that toe in or toe out can affect the soundstage height a bit, but when I went to the 6' B&W800 from the 4' B&W801, the soundstage height increased dramatically and even towards the end of the stage that is where the most obvious change had happened, the people singing are now standing instead of sitting. From then, it was hard for me to go back to a 'short' speaker system.
Having lived with mini monitors in the past (on stands), and then tall speakers like the B&W800s and now the Magnepan 2.7QRs, I have found out that very little amount of tweaks, cable swapping, tube rolling or amp switching can increase the soundstage height of my system, at least in a dramatic fashion. For monitors, I have found out that toe in or toe out can affect the soundstage height a bit, but when I went to the 6' B&W800 from the 4' B&W801, the soundstage height increased dramatically and even towards the end of the stage that is where the most obvious change had happened, the people singing are now standing instead of sitting. From then, it was hard for me to go back to a 'short' speaker system.