NAD 917 - Page 10

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also needs to be correctly set for your normal listen-
ing position.
The adjustment of speaker levels is done using the
Test and Speaker Adjust functions on the Remote
Control.
It is important first to correctly phase all the speakers
in the system. Check that the positive (+) terminals of
the amplifier speaker outputs are connected to the
positive (+) connector on the each of the speakers.
Before starting the set-up procedure, ensure that the
rear panel DOLBY PHANTOM/NORMAL, 3CH/4CH
and SUBWOOFER SELECTOR switches are set cor-
rectly for your speaker configuration. If your power
amplifiers have level controls, set them to a nominal
line level setting (0dB) and make all further level
adjustments using the 917’s controls only.
TONE DEFEAT should be ON, MONO should be
OFF and the BALANCE control set to the position
normaily used for stereo sources (uSuaily the 12
o'clock position).
USING TEST TO SET UP THE SURROUND
SYSTEM LEVELS.
With the speakers connected and the VOLUME
turned down to zero, select DOLBY PRO LOGIC’
MODE and press TEST on the Remote Control. This
generates a test signal that is fed to each of the
speaker channels in turn (Left, Center, Right and
Surround), so that each can be adjusted for equal
loudness at your listening position. Test Signal
Position indicators on the Display Panel show which
speaker is being fed with the test signal.
Turn the VOLUME up until the signal is moderately
loud through the Left and Right speakers. When the
Test signal reaches the Center speaker, press the
CENTER A or ¥ buttons on the Remote Control to
adjust the Center speaker’s loudness to match the
levels being produced by the Left and Right speak-
ers. The relative level of the Center channel is shown
in the Display Panel and can be changed in twelve
2dB steps marked between -6 and 6.
When you have finished adjusting the level of the
Center channel, the Test signal will automatically
continue switching between the speakers. If you are
unhappy with your initial setting, repeat the procedure
until the levels match.
Repeat the operation to set the Surround speaker
level using the SURROUND Aor ¥ buttons on the
Remote Control. The adjustment will affect the level
of both Surround speakers simultaneously.
If it is not possible to adjust the centre or surround
levels within the +/- 12dB range offered by the 917,
check the power amplifier connectors or level settings
(if fitted). These may need altering to match the out-
put level of the 917 (see the power amplifiers instruc-
tion manual for the most suitable connector and level
setting).
A more accurate adjustment can be made using a
sound level meter, if available. Set the meter to ‘Slow’
and ‘C-weighted’ modes and re-check the settings
with the meter placed in several different positions in
the general listening area.
lf a Sub Woofer is used on the system, use the SUB
WOOFER A or W buttons on the Remote Control to
set up the Sub Woofer level. With the test signal on
the Front Left and Right speakers, the Sub Woofer
level should be adjusted so that the Sub Woofer
speaker is audible, but does not dominate the sound.
Sub Woofer levels can be later fine-tuned using pro-
gramme material.
To leave Test mode and return to normal operation
of the 917, press the Test button once more.
SETTING THE SURROUND DELAY.
Because the Surround speakers are usually closer to
the listener than the Front speakers, there is a ten-
dency for the ear to localise sounds to the rear, as
the ear takes most notice of the sounds that arrive at
the head first. To resolve this problem, the Dolby Pro
Logic circuit includes a Surround sound delay. This
ensures sounds coming from the Surround speakers
always arrive at the listener's ears after the sounds
from the Front speakers.
The exact amount of delay needed depends on the
relative distances between the Front.and Surround
speakers to the listening position in the room.
Make a note of the distance between the Surround
speakers and the listening area and the distance
between the Front speakers and the listening area.
Use the graph below and note where the two dis-
tances intersect. This will give the recommended
Delay setting.
To adjust the Delay setting, put the 917 into Dolby
Pro Logic mode and press DELAY on the front panel
or the Remote Control. Continue pressing DELAY
until the correct value is shown in the Display Panel.
See Figure 3 for recommended distances.
Both Level and Delay settings apply to all Surround
modes and are stored in the 917’s memory. They are
automatically recalled when the unit is switched on.
For your reference, use the boxes below to make a
note of your settings. If they are accidentally altered,
you can reset them without having to run the Test
procedure.
REMOTE CONTROL
The RC917 Remote Control handles all the key func-
tions of the 917 and has additional controls to
remotely operate NAD Cassette and CD machines
and will operate up to a distance of 16ft (5m).
Alkaline batteries are recommended for maximum
operating life. The two AA (R6) batteries, are con-
tained in the battery compartment at the rear of the
Remote Control. When replacing batteries, check that
they have been put in the right way round, as shown
on the.base of the battery compartment.
For ease of operation, the main functions of Listen &
Monitor select, Volume and Mute are highlighted
using gray buttons.
The subsidiary, mode, and set-up functions have
black buttons. Power and Record (for an associated
NAD cassette deck) are in red.
Refer to previous sections of the manual for descrip-
tions of individual functions.
POWER. Switches the 917 between On and Standby.
VCR1. Selects VCR 1 as the active input.
VCR2. Selects VCR 2 as the active input.
FM. Selects the FM tuner as the active input.
AM. Selects the AM tuner as the active input.
LD. Selects the Laser Disc as the active input.
AUX. Selects the Aux as the active input.
TAPE 1. Selects Tape 1 as the active input.