i have a 6 speaker surround sound system and i use the 5.1doby didital setting but hear very little sound coming from my 2 rear surround sound sound speakers.is that normal.i think i might have something hooked up wrong on the back of my reciever.denon avr2308c1 multi zone reciever can you help me with the correct wiring to the jacks on the back.i'd like to really enjoy the true surround sound for a change.i think i've been missing out on what it should sound like