My listening\/HT area is going to be around 4x4m. However this is just a part of a much bigger living room around 40 m2. I do not know how all this translates in feets.\n\nIt is not I wouldn’t like to go for a .4 setup, it’s just I do not know where to put the backs. If I squeeze them right at my back wall, they will be practically just above my head and I am afraid there will be no differentiation in the sound with the front Atmos. According to Dolby the front ceiling Atmos are placed just in front of the listening position left and right, which means for my case the back Atmos will not be more than a meter away from the front Atmos. I will have all 4 speakers above my head.\n\nAnd I am not trying to convince you to do it, but the Atmos speaker placements are not that rigid, imo even if not placed in the optimal way, there will still be benefits. I guess you must have been to the linked site below, but may be take another detailed look.\n\nhttps:\/\/www.dolby.com\/us\/en\/guide\/speaker-setup-guides\/5.1.4-overhead-speaker-setup-guide.html \n\nThey show the angle of elevations in the range of 55 to 30 degrees. At 30 deg (180 - 150 for the rear speakers), the top rears will be behind the surrounds, but at 30 degrees, they are shown in front of the surrounds. My room has very low ceiling, just under 8 ft, so I have even worse angles than the limits shown in the Dolby guide yet and I still enjoy the effect, though it does depend on the mix\/source.