I'm always playing with acoustics, including listener height and position.Even just placing a small pillow behind my head alters the sound (focuses and brightens to some degree).
In fact I suspect that at least some of the "component break in" phenomena that audiophiles ascribe to gear changing is due to the very real sonic alterations that happen when we move even a bit. If you are listening for differences, and your head is even a slightly different position, or even a bit more upright, or a bit more slumped etc, we could attribute the sound difference to the component changing it's sound rather than to the acoustics that are happening. Just a hunch.
In fact I suspect that at least some of the "component break in" phenomena that audiophiles ascribe to gear changing is due to the very real sonic alterations that happen when we move even a bit. If you are listening for differences, and your head is even a slightly different position, or even a bit more upright, or a bit more slumped etc, we could attribute the sound difference to the component changing it's sound rather than to the acoustics that are happening. Just a hunch.