Denon AVR-1912 Owner's Manual page 53

When 7.1ch (Surround back speaker) installed
FL FR
SW
C
z1
z2
z3
SL
Listening
position
SBL SBR
z1 22˚ – 30˚ z2 90˚ – 110˚ z3 135˚ – 150˚
GSpeaker abbreviationsH
FL Front speaker (L) SB Surround back speaker
FR Front speaker (R) SBL Surround back speaker (L)
C Center speaker SBR Surround back speaker (R)
SW Subwoofer
SL Surround speaker (L)
SR Surround speaker (R)
When 6.1ch (Surround back speaker) installed
FL
SW
z2
SR SL
z1 22˚ – 30˚
When Front A/B speakers installed
FR
C
z1
SR
Listening position
SB
z2 90˚ – 110˚
50
FL(B) FL(A) FR(A) FR(B)
SW
Listening position
Install