Yamaha Aventage RX-A870 Owner's Manual page 26

5.1.2 +1Zone
E
1 2
9 3
4
Main zone
Speaker
12
FRONT
3
CENTER
45
SURROUND
67
(not used)
ER
EXTRA SP1
9
SUBWOOFER 1-2
Zone2 speakers EXTRA SP2
X
When Zone2 output is enabled (p.94), the front presence speakers in the main zone do not output sound.
R
1
9
5
Zone2
Connect to
5.1 BI-Amp
2
Speaker
12
3
45
67
ER
9
26
En
Bi-amp
1 2
3
9 9
4
Connect to
FRONT and EXTRA SP2 (bi-amp connection)
CENTER
SURROUND
(not used)
(not used)
SUBWOOFER 1-2
5