NAD
21
GB
generator to allow for adjustment of all speaker lev-
els, so that each channel can be adjusted for equal
loudness at your listening position. The test signal
scrolls automatically with 5 second intervals from
Left, Center, Right, Rear Right, Rear Left, to sub-
woofer in continuous cycles. If an adjustment in set-
ting is made for one of the speakers, scrolling will
stop until 5 seconds after the adjustment was made.
Both display panel and OSD show which speaker is
being fed with the test signal. Use the cursor
1
and
2
button to respectively increase or decrease the level
for the current speaker.
NOTE:
There is no output in the Subwoofer during noise
sequencer operation; therefore it is difficult to adjust
the level in test mode. The Subwoofer level can be
adjusted in the OSD setup menu with musical input.
The Channel Balance for each speaker can be
adjusted in 1dB increments. Continue to calibrate the
level for each speaker until equal loudness is
achieved at your listening position. 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 lis-
tening area.
Press the TEST button again to leave or cancel the
Test mode, any changes will be memorized automati-
cally.
The loudspeaker levels can also be individually
adjusted with the OSD setup menu:
• Call up the SETUP menu of the On Screen
Display (Fig. 7).
Select the channel for which you wish to adjust and
set the level so that it matches the other speakers.
For best results it is best to start with the Left channel
set at 0dB and to match the other speakers to it.
Normally, if the Right speaker is located at the same
distance from the listening position to the Left speak-
er it should be set at the same level as the Left
speaker.
NOTE:
If no level adjustments were made, press TEST
again to return to the selected source. Any changes
in the Channel Balance Setting, under the test mode,
will be memorized automatically.
LFE (Low Frequency Effects, with a Dolby Digital
source, the subwoofer channel) can be set from
+10dB to -10dB.
The Delay time for the Surround speakers also
needs to be correctly set for your normal listening
position. Refer to the section “Channel Delay” in this
chapter for more information.
12V TRIGGER OUT
This output allows to remotely switch on or off
ancillary equipment such as a tuner, power amplifier,
etc. which are also equipped with a 12V trigger input.
This can also be an AC outlet power strip equipped
with a 12V trigger input. The 12V trigger output is
activated whenever the unit is in switched to normal
operational mode from Stand-by or Off.
For switching Stand-by/Power On of an external
component through the T 751, connect the12V-trigger
output of the T 751 to the remote component’s DC
input jack. The plug required is a standard 3.5mm
Mini-Jack plug (“mono”): The tip is the live or + con-
nection, the shaft of the input jack is the 12V-trigger -
or ground connection.
NOTE:
Check the specifications of the Trigger input termi-
nal on the other components to ensure these are
compatible with the T 751’s 12V-trigger output. NAD
components equipped with 12V input triggers are fully
compatible with the T 751’s 12V output trigger.
The T 751’s 12V-trigger output voltage is 12V DC.
The total maximum current must not exceed 200mA.
Typically, NAD 12V input triggers draw less than
10mA of current.
Before making any connections to any 12V trigger
input or output, make sure all components are dis-
connected from the AC mains.
Failure to observe the above may result in damage
to the T 751 or any ancillary components attached to
it. If in doubt over the connections, installation and
operation of the 12V trigger output consult your NAD
dealer.
