I found out this evening that the HW-E450 cannot be mounted any other way other than with the mounting plate it comes with. Problem for me is that my TV and Sound Surround unit are inside of a TV cabinet and we don't have access to a wall. Bad planning by Samsung for this unit!
I bought a HW-E450 Sound Surround. It's great. I also bought brackets from Sewell Direct (SB-32-1) but there don't seem to be any screw holes on the back of the HW-E450 to mount to my Samsung HDTV. Am I missing something?