Meridian 565 Installation Manual page 42

Centre Phase
As in the previous test, signals are applied to the main left, right,
and centre speakers to allow you to adjust the relative phase
and delay on the centre channel.
Use > and < to switch between phase and delay.
When setting phase the display shows the absolute phase of the
centre speaker.
For example:
Use A and V to change the phase.
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Choose the correct setting as follows:
Setting
Correct
Incorrect
When setting the delay the display shows the relative
displacement, in feet, of the centre speaker.
Choose the correct setting as follows:
Setting
Correct
C e n t r e P h s +
Incorrect
What it sounds like
The centre speaker reinforces the
sound.
The sound from the centre cancels
some of the image formed by the left
and right speakers.
Use A and V to adjust the delay.
What it sounds like
The sound between the speakers is
very even, and does not change
radically as you move your head.
The sound appears diffused, and
changes in timbre and apparent
location as you move your head.