why 3D Holographic sound

HI, guys, my question is, why I'experience thru holographic sound when standindg in front of my speakers obout 7' away and not as much when sitting in my chair about same distance, does it have something to do with speaker placement, or what,trying to find the reason why this is happening, dont' like to stand when playing my music, any sugestions will be apreciated. regards: