Speaker placement is tricky. Of course having nothing between the speakers would be preferred but long cable runs or equipment placement may prevent that from happening.
I tried multiple placement configurations based on several "mathematical" models. There are too many variables with furnishings to make it truly work but can be used as a general guide. I found the most effective placement technique was to use the Wilson audio set up guide with the room furnished as you plan to use it. I also found it effective to use the Jim Smith guide relative to the speakers and listening chair. The distance between the speakers are 83 to 86% of the distance from the speakers to the listening chair. Just my two cents worth.