Pioneer VSX-921 - Manual (Page 35)

En 35
06 Listening to your system
Phase Control technology provides coherent
sound reproduction through the use of phase
matching for an optimal sound image. The
default setting is on and we recommend leav-
ing Phase Control switched on for all sound
sources.
1 Press to the receiver operation
mode.
2 Press PHASE CTRL (PHASE CONTROL) to
switch on phase correction.
The PHASE CONTROL indicator on the front
panel lights.
Note
! Phase matching is a very important factor
in achieving proper sound reproduction.
If two waveforms are ‘in phase’, they crest
and trough together, resulting in increased
amplitude, clarity and presence of the sound
signal. If a crest of a wave meets a trough,
then the sound will be ‘out of phase’ and an
unreliable sound image will be produced.
! The PHASE CONTROL feature is available
even when the headphones are plugged in.
! If your subwoofer has a phase control switch,
set it to the plus (+) sign (or 0º). However,
the effect you can actually feel when
PHASE CONTROL is set to ON on this receiver
depends on the type of your subwoofer. Set
your subwoofer to maximize the effect. It is
also recommended you try changing the
orientation or the place of your subwoofer.
! Set the built-in lowpass filter switch of your
subwoofer to off. If this cannot be done on
your subwoofer, set the cutoff frequency to a
higher value.
! If the speaker distance is not properly set, you
may not have a maximized PHASE CONTROL
effect.
! The PHASE CONTROL mode cannot be set to
ON in the following cases:
— When the PURE DIRECT mode is switched
on.
— When the HDMI audio output parameter is
set to THROUGH in Setting the Setting the
Audio options on page 44 .