I need your insights on the optimal configurations. My Rotel rsx-1065 has 7 mch inputs, that include 1 Center Back (CB) input, in addition to the usual (FL,FR,CE,SL,SR,SUB). Question: what would be the use of CB input on MC playback (perhaps because I haven't stumble into 6.1 SACD/DVD-A players nor 6.1 recording)?
Second situation, the Pre Out of this unit has CB1,CB2,CE1,CE2,SUB1,SUB2,FL,FR,SL,SR. Question: CB1 and CB2, are they identical output? the same with SUB1/2 and CE1/2? Sorry if this sound too obvious for some, but I am trying to understand if this is more of a convenient features to simplify interconnects hookups for multi sub/multi center/multi surround backs speakers, or if there is actually different audio contents for each (other than subs, since I believe that there is no difference between sub 1/2 content). Thanks in advance for your comments...fh