Is it not the other way around? Mid ‘at or slightly below your ear’With 3-way ATC’s, your ears should be at the level of the midrange element or even slightly lower than that, not on the level of tweeter. If your ears are on tweeter level, either try to give more height to the speakers with 3rd party footers or some slabs under the speakers (I use granite slabs) or buy lower sofa/listening chair.
The image attached is from ATC classic range manual.
Not your ear below it….