Adjusting Speaker Level Balance - Aiwa CX-NMT90 Operating Instructions Manual

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 3)
Make sure the TV set and video unit are properly connected.
(See page 4)
Make sure the laser disc, video tape, etc., support
no
~DOLBY SURROUNIJ.
ADJUSTING SPEAKER LEVEL BALANCE
DOLBY
2,4
1
3
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, at the listening position, the same apparent loudness
from each channel.
Use the remote control.
1
2
Press the DOLBY PRO LOGIC button to select
NORMAL.
NORMAL lights up in red.
If PHANTOM or 3CH - LOGIC lights up in red, press the
DOLBY PRO LOGIC button repeatedly until NORMAL is
selected.
Press the MANUAL SELECT (TEST) button and
hold it down for about four seconds until "L"
flashes.
3
4
r
L:
Left speaker —CEN: Center speaker
SUR: Surround speakers e
R: Right speaker 3
Adjust the sound level of the center and the
surround speakers.
While "CEN" or "SUR is displayed, press the DOWN l<< or
UP >1 button to adjust the volume of the center or surround
speakers
To adjusi
to match the level of the left and right speakers
the balance between the left and right speakers,
see page 6. At this time, the DOLBY PRO LOGIC mode should
be canceled by pressing the DOLBY PRO LOGIC button until
the "P-OFF is displayed.
Press the MANUAL SELECT (TEST) button again
to stop the noise signal.
m
If the surround speakers level of the SURROUND is changed
(see page 7), that of the DOLBY PRO LOGIC 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 21 ms
(milliseconds).
To change this standard delay time, press the MANUAL SELECT
(TEST) button on the remote control repeatedly until "TIME" is
displayed. Then, press the DOWN 1<< or UP >1 button. Each
time one of the buttons is pressed, the delay time changes as
shown below.
15mS+-+21mSH30mS
A noise signal is sent to each channel in turn in the following
sequence.
~7
ENGLISH