Marantz SR5009 - Manual (Page 33)

n 7.1-channel (surround back)
This 7.1-channel surround system is the same as a basic 5.1-channel system but with surround back speakers.
Sound modes such as Dolby Pro Logic gx are supported.
.
FL
SW
SL
FR
SR
SBR SBL
.
FL FR C SR SL SBR SBL SW
When using a single surround back speaker, connect it to the SURROUND BACK L
terminal.
Contents Connections Playback Settings Tips Appendix
33 Front panel Display Rear panel Remote Index