Using Full Band Phase Control - Pioneer VSX-LX70 Operating Instructions Manual

5 minute guide

Using Full Band 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 calibrating test signals
output from the speakers with the supplied microphone,
therefore flattening the analyzed frequency-phase
characteristics during audio signal playback
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.
Full Band Phase Control OFF
Tweeter
Midrange
Woofer
Group Delay Characteristics
ms
Note
1 To calibrate and analyze the frequency-phase characteristics of the speakers, follow the procedures in Auto MCACC (see Automatically setting up for
surround sound (MCACC & Full Band Phase Control) on page 8) or FULL BAND PHASE CTRL in the System Setup (see Full Band Phase Control on page 45).
Select ALL when you perform the Auto MCACC setup with CUSTOM. Upon calibration of the frequency-phase characteristics of the speakers, the FULL
BAND PHASE CTRL feature is automatically switched on. Note that FULLBAND PHASE cannot be selected unless the frequency-phase characteristics of
the speakers are calibrated.
2 The original characteristics of group delay of the speakers calibrated and the targeted characteristics after correction can be displayed graphically in
the OSD (see Full Band Phase Control on page 45). Also, when your PC is connected to this receiver, 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 Advanced MCACC output using your
PC on page 61).
3 • 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 is selected.
– When the HDMI audio output parameter is set to THROUGH in Setting the Audio options.
1
– the same
2
Hz
Sound in the middle- and low-frequency ranges is
delayed against the high-frequency sound due to group
delay.
Full Band Phase Control ON
Tweeter
Midrange
Woofer
Group Delay Characteristics
ms
With the phase distortion corrected, the frequency-phase
characteristics are improved across all ranges.
• Sound with live dynamics
• Sound of musical instruments with superb reality
• Sound so accurately reproduced that you can even
hear the lip movement of the singer
• Speech heard with no loss of clarity
• Surround sound with excellent integration
PHOTO
STATUS STATUS SIGNAL SEL
THX
MULTI OPE
SHIFT
PHASE
• Press PHASE (PHASE CONTROL) to select
3
FULLBAND PHASE.
Both the Phase Control and Full Band Phase Control
functions are switched on. The FULL BAND PHASE CTRL
indicator lights on the front panel display.
Hz
T.DISP
STEREO/
SBch
F.S.SURR
STANDARD ADV. SURR
MCACC S.DIRECT
02
11
En