Sony STR-DH740 Operating Instructions Manual page 31

Indicators Selected speakers
SP A+B* The speaker connected to both
the SPEAKERS FRONT A and
SPEAKERS SURROUND
BACK/BI-AMP/FRONT
HIGH/FRONT B terminals
(parallel connection).
"SPK OFF" appears on the
display panel.
No audio signals are output from
any speaker terminals.
* To select "SP B" or "SP A+B", set the "SB
Assign" to "Speaker B" in the Speaker Settings
menu (page 60).
Note
This setting is not available when headphones are
connected.
Notes on Speaker
Settings (Auto
Calibration)
This receiver is equipped with DCAC
(Digital Cinema Auto Calibration) function
which allows you to perform automatic
calibration as follows:
• Check the connection between each
speaker and the receiver.
• Adjust the speaker level.
• Measure the distance of each speaker
from your seating position.*
• Measure the speaker size.*
• Measure the frequency characteristics
(EQ).*
* The measurement result is not utilized when
"Analog Direct" is selected.
The DCAC is designed to achieve proper
sound balance for your room. However,
you can adjust the speaker levels manually
according to your preference. For details,
see "Test Tone" (page 62).
Before you perform Auto
Calibration
Before you perform Auto Calibration,
check the following items.
• Set up and connect the speakers (page 19,
21).
• Connect only the supplied optimizer
microphone to the AUTO CAL MIC jack.
Do not connect any other microphones to
this jack.
• Set the "SB Assign" to "Bi-Amp" in the
Speaker Settings menu if you use bi-
amplifier connection (page 56).
• Set the "SB Assign" to "Speaker B" in the
Speaker Settings menu if you use
speakers front B connection (page 60).
• Make sure the speaker output is not set to
"SPK OFF" (page 60).
• Disconnect the headphones.
• Remove any obstacles in the path
between the optimizer microphone and
the speakers to avoid measurement
errors.
• Get accurate measurement by making
sure the environment is free from noise
and quiet.
Notes
• The speakers emit very loud sound during the
calibration and the volume cannot be adjusted.
Provide consideration to your neighborhood and
to the children in presence.
• If the muting function has been activated before
you perform Auto Calibration, the muting
function will shut off automatically.
• The correct measurements may not be able to
take or Auto Calibration cannot be performed
when special speakers, such as dipole speakers
are used.
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