Sony STR-ZA810ES Manual page 152

Select [Surround Speaker Position].
2
Select the setting according to the angle of the surround speaker positions.
3
Front: When the surround speakers are placed at less than 90° (forward from your
listening position).
Back: When the surround speakers are placed at more than 90° (backward from your
listening position).
Note
This function does not work when there are no surround speakers.
[167] Adjusting Settings
Calibrating speaker positioning (Speaker
Relocation/Phantom Surround Back)
This function calibrates the speaker positioning (angle of each speaker's configuration from the
measurement position) based on the measurement results of the Auto Calibration (D.C.A.C.
EX) function to bring the sound closer to the surround-sound effect obtained with ideal speaker
positioning. Thus, for example, this function can allow you to enjoy a surround-sound effect
acoustically equivalent to that of a 7.1.2-channel speaker system, using only a 5.1.2-channel
speaker system.
Select [Setup] - [Speaker Settings] from the home menu.
1
Select [SpeakerRelocation/PhantomSurroundBack].
2
Select the setting you want.
3
Type A: This function adjusts each speaker's distance and angle to simulate the sound
of an ideally placed surround system. When surround speakers are available, the
surround back speakers sound as if they have been placed on the back wall.
When height speakers such as front high speakers or top middle speakers are
available, the height speakers sound as if they have been placed on each side directly
aligned with the front speakers.
Speaker Settings