the key is: those speakers, in that space, at that location
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I suggest: Get thee a simple Sound Pressure Meter, tripod, set at ear height at listening position
next a test cd with individual tones. Note: I scanned several Stereophile Test CD’s, others, none of them have the full range of frequencies this test disc has (29).
https://www.discogs.com/release/7290000-Various-Amazing-Bytes
you will know how flat of a frequency response your speakers are producing, IN That Space, AT that location.
Next, try new positioning and different toe-in, measure the differences.
Amazing Bytes is hard to find, and expensive, I can find a used copy if interested.