Aiwa AV-X220 - Manual (Page 14)

ADJUSTING SPEAKER LEVEL
BALANCE
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The unit is equipped with a built-in test signal generator called a
noise sequencer for easy balance adjustment of all four channels.
The sequencer outputs a noise signal that “travels” from channel
to channel, enabling the simple adjustment of sound level to
achieve the same apparent loudness, at your listening position,
from each channel.
1 Select the Dolby Pro Logic mode according to
your current type and placement of the speakers.
(See page 12.)
2 Press the MANUAL SELECT button and hold it
down for about two seconds untii “L TEST”
appears.
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4 Press the MANUAL SELECT button again to stop
the noise signai.
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If the surround speakers volume of the DSP is changed (see
page 8), the Dolby Pro Logic surround speakers level is also
changed.
About the channels
The left and right speakers create the stereo effect.
The center speaker helps achieve precise sound positioning
over a broad sound field.
The rear-mounted surround speakers enhance the “depth” of
the sound field.
To change the delay time
The surround speakers reproduce sounds a split second after
the front speakers. The delay is initially set to 20 ms
(milliseconds).
To change this standard delay time, press the MANUAL SELECT
button twice or three times so that “TIME” is displayed. Then,
press the UP A or DOWNT button. Each time one of the buttons
is pressed, the delay time changes as shown below.
15ms • '20ms 30ms
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To change the sound levels after adjusting the balance
with the noise sequencer
The sound levels of the center and surround speakers can be
adjusted during play of a laser disc or video software.
1 Press the MANUAL SELECT button once or twice to select
“CEN” or “SUR” (center or surround).
2 While the “CEN” or “SUR” is displayed, press the UPA or
DOWNV button to adjust the volume.
A noise signal is sent to each channel in turn as follows:
DOLBY PRO LOGIC NORMAL or WIDE mode
I—► L TEST: (Left speaker)-----►TEST R: (Right speaker)----- 1
' ----- SUR: (Surround speaker)-^------ CEN: (Center speaker)^—I
DOLBY PRO LOGIC PHANTOM mode
'L TEST----- ►TEST R----►SUR-
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3CH LOGIC NORMAL or WIDE mode
'L TEST----- ►TEST R----►CEN-
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3 Adjust the sound level of the center and (or)
surround speakers.
While “CEN” or “SUR” is displayed, press the UPA or
DOWNT button to adjust the volume of the center or surround
speakers to match the level of the left and right speakers.
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To adjust the balance between the left and right speakers,
use the BALANCE control while “L TEST” or “TEST R” is
displayed.
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