It’s entirely an alchemy dependent on the OEM speaker brand influences in constant tension with the dimensions/design/ resulting warts of the listening room.
There is no “one-size-fits-all” general rule to follow because of varying brand speaker designs and performance capabilities. For example, the dispersion of a ribbon tweeter vs. A soft dome tweeter, vs. Concentric centred with a woofer design may all be different. Follow your OEM speaker manual for first guidance.
For the bespoke listening room factors portion in the equation, there are significant points of first reflection that are complemented with secondary ones, all three of which need to be identified and tamed if necessary.
TAKEAWAY:
There is no substitute for hands-on experimentation..
