Pioneer SC-LX73 - Manual (Page 60)

Listening to your system 06
60
En
Phase Control technology provides coherent sound
reproduction through the use of phase matching
1
for an
optimal sound image. The default setting is on and we
recommend leaving Phase Control switched on for all
sound sources.
1 Set the remote control to the receiver operation
mode.
• Press PHASE CTRL (PHASE CONTROL) to switch on
phase correction.
The
PHASE CONTROL indicator on the front panel lights.
Better sound using Phase Control and
Full Band Phase Control
(SC-LX83 only)
This receiver is equipped with the two types of functions
that correct phase distortion and group delay: Phase
Control and Full Band Phase Control. Activating Full
Band Phase Control is strongly recommended because it
also involves the effects of Phase Control.
The Full Band Phase Control feature calibrates the
frequency-phase characteristics of the speakers
connected.
Standard speakers designed exclusively for audio use
generally reproduce sound with the divided frequency
bands output from a speaker system consisting of
multiple speakers (in case of typical 3-way speakers, for
instance, the tweeter, the squawker (midrange), and the
woofer output sound in the high-, middle-, and low-
frequency ranges, respectively). Though these speakers
are designed to flatten the frequency-amplitude
characteristics across wide ranges, there are cases
where the group delay characteristics are not effectively
flattened. This phase distortion of the speakers
subsequently causes group delay (the delay of low-
frequency sound against high-frequency sound) during
audio signal playback.
This receiver analyzes the frequency-phase
characteristics of the speakers by measuring test signals
output from the speakers with the supplied microphone,
therefore flattening the analyzed frequency-phase
characteristics during audio signal playback
2
– the same
correction is made for a pair of left and right speakers.
This correction minimizes group delay between the
ranges of a speaker and improves the frequency-phase
characteristics across all ranges.
Furthermore, the enhanced frequency-phase
characteristics between channels ensure better
surround sound integration for multichannel setting.
3
1 Set the remote control to the receiver operation
mode.
2 Press PHASE CTRL (PHASE CONTROL) to select
FULLBAND PHASE.
4
Both the Phase Control and Full Band Phase Control
functions are switched on. The
FULL BAND and
indicator, on the front panel lights.
Note
1 • 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 0°). 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 MULTI CH IN input is selected.
– When the HDMI audio output parameter is set to THROUGH in Setting the Audio options on page 72.
2 To calibrate and analyze the frequency-phase characteristics of the speakers, either follow the Full Auto MCACC procedure under Advanced
MCACC (see Automatically conducting optimum sound tuning (Full Auto MCACC) on page 42), or set Auto MCACC menu under Auto MCACC
under
Advanced MCACC to Full Band Phase Ctrl. Select ALL when you perform the Auto MCACC with Auto MCACC menu. Upon
calibration of the frequency-phase characteristics of the speakers, the Full Band Phase Ctrl feature is automatically switched on.
3 The original characteristics of group delay of the speakers calibrated and the targeted characteristics after correction can be displayed
graphically in the GUI screen (see Group Delay (SC-LX83 only) on page 107). Also, by transferring the measurement data to the computer using
a USB device, the original characteristics of group delay of the speakers calibrated and the corrected characteristics of group delay can be
displayed in 3-dimension on your PC (see Output MCACC data on page 108).
4 The Full Band Phase Ctrl mode cannot be set to ON in the following cases:
– When headphones are plugged in.
– When the
PURE DIRECT mode is switched on.
– When MULTI CH IN input is selected.
– When the HDMI audio output parameter is set to THROUGH in Setting the Audio options on page 72.