Marantz AV7702mkg Owner's Manual page 256

Contents Connections
Front Speaker
Set the front speaker A/B to use for every sound mode.
A
Front speaker A is used.
(Default):
B : Front speaker B is used.
A+B : Both front speakers A and B are used.
0 This can be set when "Assign Mode" is set to "9.1ch + Front B". (v p. 240)
0 This can be set by pressing SPKR A/B on the main unit.
Front panel Display
Playback Settings
256
Rear panel
Tips
Remote Index
Appendix