Hi

As a few easy (and free!) starting points:


1. Apply the "corner" boundary setting to the DSPs

2. Toe in so that the tweeters' "line of sight" crosses at, or just in front of, your listening position

3. Move the speakers out from the rear wall in increments of a few inches at a time if feasible


Is your room lively, neutral, damped at present? Standing in the middle of the room and clapping hands can give some clue as you'll hear how much or how little echo is there. If there's any scope for moving furniture around (large cushions, padded foot stools etc) that can make a difference too. Clearly subject to WAF!

Cheers
George