Although tweeter at ear level is the general rule, experimentation can work wonders. I had a pair of Silverline Audio SR-11s sitting on 24 inch stands with tweeters at ear level. The sound was good but if I slouched down the sound was better. I moved them to taller stands which raised the tweeter about six inches. Huge improvement.
More recently I had the opposite experience with PMC DB1+ speakers. They started out with the tweeter at ear level but after some experimentation I found the sound improved with the tweeter about 4-6 inches below ear level.
Experiment to get what suits you best has become my rule.
More recently I had the opposite experience with PMC DB1+ speakers. They started out with the tweeter at ear level but after some experimentation I found the sound improved with the tweeter about 4-6 inches below ear level.
Experiment to get what suits you best has become my rule.