I’m one who doesn’t believe equipment should be in between the speakers as it will negatively effect the soundstage and overall performance of the speakers. So it does not surprise me that moving equipment between the speakers has an effect. My rack is to the side.
On the other hand, yes, even small adjustment to the speakers themselves can can substantial changes; width, dimension from the front wall, toe-in, etc. without equipment between.
On the other hand, yes, even small adjustment to the speakers themselves can can substantial changes; width, dimension from the front wall, toe-in, etc. without equipment between.