Sansui SE-9 - Sound Field Compensation; Initial Setup and Microphone Placement; Compensation Process Execution; Storing and Listening to Flat Response

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COMPENSATE
Making the sound field flat (compensating)
This unit uses a computer to analyze the overall frequency response of
your stereo system inclusive of the acoustics of the listening room, it
automatically reproduces the reverse characteristics by the graphic equal-
izer and makes it possible to flatten the sound field by producing as a re-
sult a flat frequency response.
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Depress the POWER switch and supply power to the unit.
Plug the microphone into the MIC jack.
Rotate the unit's OUTPUT LEVEL control and amplifier’s volume
control to the regular listening levels.
Set the microphone’s power switch to ON, point it toward the center
of the left and right channel speakers and install it at the listening
position.
Rotate the P.N. LEVEL control clockwise to its interim position.
. Depress the MODE ‘‘COMPENSATE” switch.
. First, pink noise is reproduced through the left channel speaker. If the
UNDER LEVEL indicator winks, the level is too low; if the OVER
LEVEL indicator winks, it is too high. Adjust so that both indicators
are off.
Once the level is made constant, pink noise is reproduced at 0.5 sec.
intervals through the left and richt channel speakers, the computer is
now activated and the equalizer controls are set automatically. The
overall frequency response at the position where the microphone has
been installed is now made flat.
. When the MODE “LINE/RESET” switch is depressed, the BUSY indi-
cator goes off and the indicator above the MEMORY “FLAT” switch
lights, indicating that the flat equalization has now been stored in the
MEMORY “FLAT” switch.
Reproduce the program source after the EQUALIZER “ON” switch
has been depressed, and now sit back and listen to the music with its
flat frequency response.
This compensating operation should be carried out so that it is com-
peted within about 30 seconds after the MODE ‘’COMPENSATE”
switch has been depressed. If the reproduction level of the pink noise
does not come within the above range in this time limit, it will not be
possible to achieve the flat equalization. If this happens, repeat the
compensating operation.
When the microphone is installed in a different location and the com-
pensating operation is tried again, the flat equalization obtained at
the new position is stored in the MEMORY ‘'FLAT” switch and the
former memory contents are erased automatically.
It is possible to store the flat equalizations at various positions into
the MEMORY 1 ~ 4 switches using the MEMORY “SET” switch.
Remember always to set the power switch to OFF after having used
the microphone.
In the unlikely event that the BUSY indicator starts to wink, it means
that the built-in microcomputer has detected some kind of error and,
as a result, the unit stops working. If this happens, depress the MODE
“LINE/RESET” switch and proceed with operation after having
checked that the BUSY indicator has gone off.