From personal experience: the height of the speaker stand is a relationship based on your seated ear height from your listening chair and the height of the center of the tweeter on said stand. An easy way to get in the zone is while playing music raise up, then scooch down several times until you lock it in. Best if you have someone next to you with a tape measure to mark the height from the floor to the middle your ear where the music sounds best. Consider that few stand speakers are the same height therefore their tweeters are located at different heights above the speaker stands resting plate
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