Pioneer VSX-LX52 - Manual (Page 77)

The Advanced MCACC menu 10
77
En
Acoustic Calibration EQ Adjust
• Default setting: ON 1 /0.0dB (all channels/bands)
Acoustic Calibration Equalization is a kind of room
equalizer for your speakers (excluding the subwoofer). It
works by measuring the acoustic characteristics of your
room and neutralizing the ambient characteristics that
can color the original source material (providing a ‘flat’
equalization setting). If you’re not satisfied with the
adjustment provided in Automatically setting up for
surround sound (Auto MCACC) on page 39 or Automatic
MCACC (Expert) on page 72, you can also adjust these
settings manually to get a frequency balance that suits
your tastes.
1 Select ‘EQ Adjust’ from the Manual MCACC setup
menu.
2 Select the channel(s) you want and adjust to your
liking.
Use
/ to select the channel.
Use / to select the frequency and / to boost or
cut the EQ. When you’re finished, go back to the top of
the screen and press
 to return to Ch, then use / to
select the channel.
• The OVER! indicator shows in the display if the
frequency adjustment is too drastic and might
distort. If this happens, bring the level down until
OVER! disappears from the display.
Tip
• Changing the frequency curve of one channel too
drastically will affect the overall balance. If the speaker
balance seems uneven, you can raise or lower channel
levels using test tones with the TRIM feature. Use
/
 to select TRIM, then use / to raise or lower the
channel level for the current speaker.
3 When you’re finished, press RETURN.
You will return to the Manual MCACC setup menu.
Acoustic Calibration EQ Professional
This setup minimizes the unwanted effects of room
reverberation by allowing you to calibrate your system
based on the direct sound coming from the speakers. It
can also provide you with a graphical output of the
frequency response of your room.
2
How to use Acoustic Calibration EQ Professional
If you find that lower frequencies seem overly reverberant
in your listening room (i.e. it sounds ‘boomy’), or that
different channels seem to exhibit different reverb
characteristics, select EQ Pro. & S-Wave (or ALL) for the
Auto MCACC setting in Automatic MCACC (Expert) on
page 72 to calibrate the room automatically. This should
provide a balanced calibration that suits the
characteristics of your listening room.
If you still aren’t satisfied with the results, the manual
Advanced EQ Setup (below) provides a more
customized calibration of your system using the direct
sound of the speakers. This is done with the help of a
graphical output that can be displayed on-screen, or
using a computer (with software available from Pioneer
— see Output PC on page 81).
How to interpret the graphical output
The graph shows decibels on the vertical axis and time (in
milliseconds) on the horizontal axis. A straight line
indicates a flat-response room (no reverb), whereas a
sloping line indicates the presence of reverberation when
outputting test tones. The sloping line will eventually
flatten out when the reverberant sound stabilizes (this
usually takes about 100 ms or so).
By analyzing the graph, you should be able to see how
your room is responding to certain frequencies.
Differences in channel level and speaker distance are
taken into account automatically (compensation is
provided for comparison purposes), and the frequency
measurements can be examined both with and without
the equalization performed by this receiver.
3
Note
1 When EQ Adjust is selected for an MCACC preset memory where EQ is set to OFF in the AUDIO PARAMETER, EQ ON is automatically
selected.
1. Fine Channel Level
2. Fine SP Distance
3. Standing Wave
1c.Manual MCACC
4. EQ Adjust
5. EQ Professional
A/V RECEIVER
Exit Return
63
[Hz]
125
[Hz]
250
[Hz]
500
[Hz]
1k
[Hz]
2k
[Hz]
4k
[Hz]
8k
[Hz]
16k
[Hz]
TRIM
dB
1c4.EQ Adjust
Exit Finish
0.0 Ch : L -6.0 -8.0 0.0 +8.5 +3.0 +8.5 0.0 0.0 +3.0
A/V RECEIVER
MCACC
M1.MEMORY1
2 This system allows you to customize your system calibration with the help of a graphical output that can be displayed on-screen, or using a
computer (with software available from Pioneer—see Output PC on page 81 for more on this).
3 Note that due to an effect known as ‘group delay’, lower frequencies will take longer to be generated than higher frequencies (this is most
obvious when comparing the frequencies at 0 ms). This initial slope is not a problem (i.e. excessive reverb) with your listening room.
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