Toe-in affects center image focus. Tilt affects image height and soundstage "blossom". Chack out my website for a step by step method to optimize both. myspeakersetup.com
Speaker positioning toe and tilt
How does tilting a speaker effect the soundstage and bass response? Also, how does toeing a speaker in directly towards me effect bass as a result of a rear firing port now reflecting closer to the back corner of the room?