A 5.1.2 setup of Dolby Atmos speakers employs either two ceiling speakers or two Dolby Atmos-enabled speakers or modules. If you have Dolby Atmos-enabled speakers, place them at the left front and right front locations. In the case of add-on modules, they should be placed atop the left and right front speakers, or within 3 feet of those speakers. The drivers must face the ceiling. Do not place speakers higher than half the height of the room's wall. A 5.1.4 system uses four ceiling speakers, or four Dolby Atmos-enabled speakers or modules. Place speakers at the left front and left right locations of the listener, and at the left and right surround locations. Follow the same directions as stated in the above paragraph for add-on modules, with add-on modules also on top of the two surround speakers, or no further than 3 feet from them. Optimum sound is achieved with front and surround speakers at or just above the ear level of the seated listener.