Sony SQA-2030 - Four-Channel; Sound Adjustments

FOUR-CHANNEL SOUND ADJUSTMENTS
After connecting as described in the previous section, make the
following adjustments in the order given.
Preparation
1. Set the SQA-2030 controls as follows:
Control
Setting
MASTER VOLUME control
Fully counterclockwise*
F/B BALANCE control
Center*
BACK BALANCE control
Center*
SYSTEM button
Depress “2 CH.”
MODE switch MONO
MONITOR switch SOURCE
BACK BASS control Center
BACK TREBLE control Center
LOUDNESS switch OFF
LEVEL ADJUST (INPUT) NORMAL*
switch (rear panel)
2. Set the front amplifier controls as follows:
Control
Setting
Volume control
Balance contro!
Fully counterclockwise*
Previously usual position*
Mode switch Stereo
Monitor switch Tape
Input selector Phono
Tone controls
Flat response settings
Loudness switch
Off
* Temporary settings
3. For input level setting and four-channel balance adjustment
select a conventional stereo record containing the loudest
sound in your record library, and for the phasing check select
a record containing prominent bass notes.
SQA-2030 Input Level Setting
= . Turn on the SQA-2030 and the front amplifier.
. Play the test record containing the loudest sound.
. Adjust the SQA-2030 MASTER VOLUME control so that the
back speakers provide your ordinary listening level.
. If the sound is distorted (or the sound image is unstable)
even with a low volume setting, move the SOQA-2030 LEVEL
ADJUST (INPUT) switch (on the rear panel) to HIGH to prevent
decoder-input overload. If the sound is very low with the
MASTER VOLUME control set at about 12 o'clock position,
move the LEVEL ADJUST (INPUT) switch to LOW. Except
for the above case, leave the switch at NORMAL.
. If you move the LEVEL ADJUST (INPUT) switch to HIGH or
LOW, readjust the MASTER VOLUME control to provide
ordinary listening level.
Record player
Front volume
control (muted)
Front amplifier
While listening to
the back sound,
move the LEVEL
ADJUST (INPUT)
switch on the rear ‘
panel.
SQA-2030
Adjust to listening
level.
MASTER VOLUME
Four-channel Balance Adjustments
ie
Turn on the SQA-2030 and the front amplifier.
2. Play the record used in the previous section (“Input Level
a1
#2:
. Ensure that the back speakers provide the usual level.
. Four-channel balance adjustments :
Setting”).
If not,
readjust the MASTER VOLUME control.
. Mute either the right or left speakers of both front and back
channels by moving the BALANCE controls of the SQA-2030
and the front amplifier.
. Front volume setting: Turn the front amplifier volume control
so that the front speaker provides the same level as that of
the back speaker. Ensure that the front amplifier volume
setting does not exceed the usual setting position. If it does,
move the front amplifier volume control to the usual position
and balance the front-back level with the SQA-2030 F/B
BALANCE control*1,
Adjust the front amplifier
balance control, the SQA-2030 BACK BALANCE control and
the F/B BALANCE control so that the sound seems to come
from a point central to the four speakers*2.
. Mark or note the final setting positions of the front amplifier
volume control and balance control, and the SQA-2030
F/B BALANCE and BACK BALANCE controls. Then, should
someone inadvertently move these controls from their preset
positions, or you move them during the phasing check in the
next section, you can quickly restore the original settings.
. After setting the four-channel balance properly, you can
control the overall sound with the MASTER VOLUME control.
Do not set the front amplifier volume control too high.
Otherwise speaker damage may result should you inadver-
tently set the front amplifier monitor switch to the source
position.
If you wish to separately balance the front and back channels,
either the front or back speakers can be muted with the
SQA-2030 F/B BALANCE control.