Sony STR-DH590 Operating Instructions Manual page 17

2.1-channel speaker system
If you select [Front Surround] for the sound field setting, you can enjoy surround effects
equivalent to that of a 5.1-channel speaker system using only the two front speakers.
Place the speakers as shown below and change the direction of the front speakers little by
little to find the direction that provides the best surround effect.
 30˚  1.5 m – 3 m
Speaker cable (not supplied)
Monaural audio cable (not supplied)
Set the height of a tweeter of the front
speaker at the same height as your ears.
17 GB