You are correct sound these JBL_PRO are the real deal, your room is much bigger then mine so I use only one Subwoofer for the .1 Dolby Digital or DTS.(according to JBL theater requirements you need one 4641 for a room that is 700 M3 to be on the safe side)I think i mention my main speakers the GREAT JBL Studio Monitors 4430 and the 8330 for surrounds.I am just waiting to find a single 4430 for my center channel so that I can use all my front channel speakers at full range.