For both DTS:X and Atmos, you need at least a conventional 5.1 floor level layer plus 2 additional Atmos speakers. This would give you what is termed a 5.1.2 setup. The floorlayer speakers ideally need to be at your seated head height while the 2 Atmos speakers either need to be located on firing downward, on the front wall high up above the front left and right speakers or as 2 upward fireing speakers located on top of your front left and right speakers.At the moment I have 4 speakers at the back, 1 in each corner and 2 in the middle at the back on the floor. Usual 2 fronts in each corner and centre at the front. Can this do DTS: X? I wont be putting speakers in the ceiling. I can put the middle rears on a high shelf where the projector is.
This document relates to Atmos, but you can use it to determine where to place your speakers in a manner that can be utilised by both Atmos and DTS:X: