Tweeter height...align with ears?

Assuming the speakers are the Sonus Fabers listed in your system profile, you do not have to sit at the tweeter axis. Sitting slightly lower than the tweeter will not substantially change the treble balance. Stereophile reviewed the loudspeaker and performed measurements regarding dispersion characteristics. The review did note that loudspeakers where particularly sensitive to setup.

Thanks Onhwy61. That Stereophile article was a good read. Given that I am only 3" below the tweeter height at a horizontal distance of 86" away from the tweeter means that I am only off axis by less than 2 degrees. According to the the Stereophile measurements I should not hear any difference. Thank you again.

Tboooe, your setup has come along nicely.
But since you are listening near-field in a small space and based on Onhwy61's comments, it's probably better to use some diffusion on the ceiling. Absorption could create a suck-out, and you only want to soften the refection off the ceiling.

As with Yogiboy, my experience is that manufacturers always recommend ear level. Higher will increase treble; lower will decrease treble. So, flavor to taste.

for better results contact the manufacturer of the speaker and find out where the measurments were taken from. some measure on tweeter axis, some measure on woofer axis and some like my product measure where the woofer touches the tweeter making it the musical center. toe angle is something very different and depends on the radiation characteristics of the speaker, uniformity of response and personal taste.
bobby@merlin