Yamaha Aventage MusicCast RX-A870BL Owner's Manual page 28

(when using front presence speakers in the main zone)
The unit (rear)
T
SURROUND
SPEAKERS
EXTRA SP2 EXTRA SP1
SURROUND BACK F.PRESENCE
SURROUND CENTER FRONT
/ ZONE2 / BI-AMP / ZONE2
SINGLE
SUBWOOFER
1
2
E R
1 2
9 3
4 5
Main zone
FL FR
Zone2
28
En