Sony STR-DN1080 Operating Instructions Manual page 20

7.1-channel speaker system using surround back speakers
Subwoofer
 Monaural audio cable (not supplied)
 Speaker cable (not supplied)
* If you connect only one surround back speaker, connect it to the L (+/–) terminals.
After you have made the connection, select a speaker pattern with only one surround back speaker
connected for [Speaker Pattern] in [Speaker Settings].
GB
20
 30˚  100˚ – 120˚
Surround back speakers*
 Same angle
Surround speakers Center speaker
Front speakers