Sony STR-DH740 - Manual (Page 20)

20 GB
7.1 channel speaker system
using front high speakers
You can enjoy vertical sound effects by
connecting additional two front high
speakers.
Place the front high speakers
– at an angle between 25° to 35°.
– at an angle of 20° ± 5° in height.
Since the subwoofer does not emit highly
directional signals, you can place it wherever you
want.
Tip
20 ˚ ± 5˚