Aiwa NSX-MT725 - Manual (Page 26)

DOLBY PRO LOGIC
The DOLBY PRO LOGIC feature and the center and rear
speakers (standard) assure full-scale home theater sound. When
playing back laser discs or video software that have been
recorded in Dolby Surround, astonishingly realistic sound
surrounds the listener to create a new level of audio/visual
entertainment.
Independent control of the four sound channels allows the listener
to enjoy the same type of sound reproduction experienced in
movie theaters. Voices are reproduced in the front and center
sound field, while ambient sounds like cars and crowds are
reproduced on all sides of the listener for an incredibly lifelike
audio/video experience. Please read the following carefully to
“tune” the system’s output to match the characteristics of your
listening space.
Check the following:
• Before using the DOLBY PRO LOGIC, adjust the proper
balance of speaker sound levels.
• Make sure the supplied speakers are properly connected and
positioned. (See page 4 and 5)
• Make sure the TV set and video unit are properly connected.
(See page 5)
•Make sure the laser disc, video tape, etc., support
nn jPOUY SUHROUWDi .
ADJUSTING SPEAKER LEVEL BALANCE
2,4
1
The unit is equipped with a built-in test signal generator called a
noise sequencer for easy balance adjustment of all 4 channels.
The sequencer outputs a noise signal that “travels” from channel
to channel, enabling the simple adjustment of sound level to
achieve, at the listening position, the same apparent loudness
from each channel.
Use the remote control.
1 Press DOLBY PRO LOGIC to select “NORMAL”.
“NORMAL” is displayed.
If “PHANTOM” or “3 STEREO” is displayed, press
DOLBY
PRO LOGIC
repeatedly until “NORMAL’ is selected.
2 Press MANUAL SELECT and hold it down for
about 4 seconds until “L” flashes.
^LyR v \ -
A noise signal is sent to each channel in turn in the following
sequence.
r
L:
Left speaker-»
CEN:
Center speaker-»
R:
Right speaker
--------------------- SUR:
Surround speakers -<------------ ]
3 Adjust the sound level of the center and the
surround speakers.
While “CEN” or “SUR” is displayed, press ◄ ◄
DOWN
or ► ►
UP
on the remote control to adjust the volume of the center
or each surround speaker to match the level of the front
speakers.
■ CEN -i“ 3=
To adjust the balance between the left and right front speakers,
see page 10. At this time, the DOLBY PRO LOGIC mode
should be canceled by pressing
DOLBY PRO LOGIC
until
the “PRO-OFF” is displayed.
Press MANUAL SELECT again to stop the noise
signal.
• When the sequencer outputs a noise signal, a clicking sound
might be heard from the speakers due to the characteristics of
the circuit. This is not malfunction.
• If the surround speakers or the center speaker level of the
DOLBY PRO LOGIC is changed, that of the SURROUND
system (page 16) is also changed.
About the channels
The left and right front 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
MANUAL SELECT
on the remote control repeatedly until “TIME” is displayed. Then,
press
DOWN
or ► ►
UP.
Each time one of the buttons is
pressed, the delay time changes as shown below.
15 mS <-> 20 mS 30 mS
3 3 ; ' ' h n E 2 0 i M S _
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ENGLISH