Sony HT-SF1100 User Manual

This receiver allows you to use a 5.1 channel 
speaker system. To fully enjoy theater-like 
multi channel surround sound requires five 
speakers (two front speakers, a center speaker, 
and two surround speakers) and a sub woofer 
(5.1 channel).

AFront speaker (Left)
BFront speaker (Right)
CCenter speaker
DSurround speaker (Left)
ESurround speaker (Right)
FSub woofer

AFront speaker (Left)
BFront speaker (Right)
CCenter speaker
DSurround speaker (Left)
ESurround speaker (Right)
FSub woofer

Since the sub woofer does not emit highly 
directional signals, you can place it wherever you 
want.