Vocalist Height system dependent?

My guess is that given the rack in front of your left speaker that you are disrupting the primary imaging.

This means the most coherent sound you get is from the reflection from both speakers from off the ceiling.

Another factor could be the crossover...when Eva belts out her sustained high notes it is possible that some is from the midrange and some from the tweeter - this can cause beaming or lobes in response with cancellation in some directions (if you sit below the tweeter) and coherence in other directions (such as the sound that hits the halfway point on the ceiling between you and the speakers).

Another possibility is that they used a plate in the studio to record her voice or they added a reverb that makes you think she is standing 10 feet tall. Refected sound off a lively floor (or plate or delayed microphonic feedback from tubes) causes comb filtering of the sound and rightly or wrongly your brain will use this information to judge height as well as the amount of space around a sound.

All or any of the above might be a factor - but you could try by eliminating any obstacles (like a large rack stand) that may affect the sound reaching you.

Good Luck. Frankly I doubt it has anything to do with cables.

I measured my mid range driver is at 40 inches.

I would say it is more recording dependent!

Most likely an artifact of your room acoustics and your specific vertical speaker driver configuration within the room.

Different wires and even electronics might change the timbre and change the perspective accordingly as SPL levels of the different vertically aligned drivers changes accordingly as well.

All speakers share the quality that room acoustics will affect timbre/tonal balnace to some extent, but I suspect the highly noticeable change in perspective at various frequencies is more due to the specific physical vertical driver configuration in your specific speaks.

Shadorne all your points are good ones. I was just wondering if others have noticed a change in soundstage height when making changes. Also i sit about 10.5 ft from my speakers and vocals are like there up on a stage ie Eva but Diana Krall is lower which would be correct i guess because she is sitting down.

What has efected the soundstage height Fwiw is the changes I made to my grounding scheme.

also what height is considered the norm or is it all over the place.