How to place speakers at the optimum height


OK Agoners, How do you determine and place the speakers at the optimum height? If it's book shelves than it's pretty easy, you just buy an adjustable speakers stand and try it out. But what if you have floor standers? Are they already design to be at the optimum height? I don't think it would work for everyone since there are 6'5 guys and 5'6 guys so ears level are different. Is there any "audiophiles" lives in the vicinity of 95138? I like to check out some other people system to compare to mine and see what I'm missing if any. I'm pretty new to this high cost hobby so I would appreciate it if someone could show me their system. Thanks.
min888
Thanks Zman, sounds like you have the VR4 before. At what position of the pot you end up setting your ambiance level?
Tom6897,

If you sit 18-24" above the speaker, wouldn't the soundstage appear to be below you? :)
Yes.
The soundstage location comes from the center of the speaker arrangement. No mater what the toe in or out or the angle , back or forward. The soundstage will seem to be comming from the center of the mid driver and the tweeter. The woofer will be a omni-directional sound.
This has been my experience. Not everybody will agree of course.
Fiddler, I am sorry that it was unclear. My reply was related to Min888 comment about where the sound emanates from. My tweeters are at 37" high . My listening position is 11 feet away. The center image appears to be Dead Center between the speakers and even to 2 feet above the top of the speaker plane. Sorry for the confusion. My ear height from the listening positions is between 35" and 38" depending on if I sit upright or recline.
Tom6897, yes if you sit above the tweeters then the sound stage would be below you. The toe in is only for left right stereo effect. As I found out, if you lift up your mid/tweeter then the sound stage would appear to be higher. I guess it all depends on what you prefer to have, the singer right in front of you or slightly above you as in the concert. This is why I would love to check out somebody else set up and see what it music sounds like in different set up with different equipment and different preference.