based on any particular room, acoustic treatment, and speaker placement......height, width, depth and center fill of the soundstage......will vary based on the ratio triangle of the speaker width and listening position and the degree of toe-in. the other varible is the specific driver dispersion, but since that is not changable you need to ignore it.
sitting height is a varible; but only to make sure your ears are at the appropriate height for your tweeter dispersion. beyond that issue, raising the speakers or sitting lower will not raise the image..... but it may change the tonality (in a bad way probably).
i recommend you start out with an equalateral triangle; where your ears are the same distance from the tweeters that the tweeters are apart. then toe-in the speakers so they point at the top of each shoulder.
see how this set-up affects center fill, width, height and depth.
now move your chair 4 inches closer. move it back.
move your chair 4 inches farther back, move it back.
toe in the speakers a bit more, move them back.
toe the speakers out a bit, move them back.
separate the speakers more, move them back.
separate the speakers less, move them back.
at an equalateral triangle; you are in a neutral postion; when you move closer you are in the near-field, farther is the far-field.
more height will typically come from the near-field with the speakers toed slightly outside your shoulders.....but that can come at a cost of center fill.
but you need to try all these different positions to see exactly how your speakers work and to what degree. it may take a few weeks and time spent with different positions before you are satisfied. the trick is to get a feel for what causes what and then what set of compromises gives you the characterisitics you prefer.
i know i could have simply said "sit closer, toe the speakers out" and not been as wordy...but i think you need to take a whole picture viewpoint since all these adjustments are so interactive.
sitting height is a varible; but only to make sure your ears are at the appropriate height for your tweeter dispersion. beyond that issue, raising the speakers or sitting lower will not raise the image..... but it may change the tonality (in a bad way probably).
i recommend you start out with an equalateral triangle; where your ears are the same distance from the tweeters that the tweeters are apart. then toe-in the speakers so they point at the top of each shoulder.
see how this set-up affects center fill, width, height and depth.
now move your chair 4 inches closer. move it back.
move your chair 4 inches farther back, move it back.
toe in the speakers a bit more, move them back.
toe the speakers out a bit, move them back.
separate the speakers more, move them back.
separate the speakers less, move them back.
at an equalateral triangle; you are in a neutral postion; when you move closer you are in the near-field, farther is the far-field.
more height will typically come from the near-field with the speakers toed slightly outside your shoulders.....but that can come at a cost of center fill.
but you need to try all these different positions to see exactly how your speakers work and to what degree. it may take a few weeks and time spent with different positions before you are satisfied. the trick is to get a feel for what causes what and then what set of compromises gives you the characterisitics you prefer.
i know i could have simply said "sit closer, toe the speakers out" and not been as wordy...but i think you need to take a whole picture viewpoint since all these adjustments are so interactive.