rmgklipsch

I know the RP-140SA's can be wall-mounted and used as rear or side surrounds, but can they be wall mounted up high and used as rear or side down-firing height (ATMOS) speakers? I am currently running a 5.1.2 system (two Polk towers up front, a Polk center, two Polk side surrounds on stands, a Klipsch subwoofer, and two Elac upfiring ATMOS speakers on top of my front Polk towers), want to add the RP-140SA's as rear ATMOS speakers but they're too big to sit atop my side surrounds. My AVR is a Marantz SR-7010, which can handle it all. Any comments or suggestions would be much appreciated. Thanks!