I am converting a basement room into a home cinema, with 2 rows of tiered seats. I am considering installing ceiling speakers for object-based surround technology (Dolby Atmos, DTS:X and the like) but the ceiling height is only 2m (6' 6"), unfortunate but it is what it is. From what I have read, I believe this is too low as the speakers would be too close to the listening position but I have not found a definitive minimum height. Does anyone have any feedback or recommendations?