Sony str-da4600es User Guide

This receiver allows you to use a 7.1 channel 
system (7 speakers and one subwoofer).

To fully enjoy theater-like multi-channel 
surround sound requires five speakers (two 
front speakers, a center speaker, and two 
surround speakers) and a subwoofer (5.1 
channel system). 
AFront left speaker
BFront right speaker
CCenter speaker
DSurround left speaker
ESurround right speaker
JSubwoofer

You can enjoy high fidelity reproduction of 
DVD or Blu-ray Disc software recorded sound 
in 6.1 channel or 7.1 channel format if you 
connect one additional surround back speaker 
(6.1 channel system) or two surround back 
speakers (7.1 channel system).
AFront left speaker
BFront right speaker
CCenter speaker
DSurround left speaker
ESurround right speaker
FSurround back left speaker
GSurround back right speaker
JSubwoofer

You can enjoy vertical sound effects (e.g., Pro 
Logic IIz mode) if you connect additional two 
front high speakers.
AFront left speaker
BFront right speaker
CCenter speaker
DSurround left speaker
ESurround right speaker 
HLeft high speaker
IRight high speaker
JSubwoofer