NAD
T 751
751
GB
• OWNER'S MANUAL
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SAFETY WARNING
CLASS 1 LASER PRODUCT
LUOKAN 1 LASERPLAITE
KLASS 1 LASERAPPARAT
THIS DIGITAL APPARATUS DOES NOT EXCEED THE CLASS B
LIMITS FOR RADIO NOISE EMISSIONS FROM DIGITAL APPARA-
TUS AS SET OUT IN THE RADIO INTERFERENCE REGULATIONS
OF THE CANADIAN DEPARTMENT OF COMMUNICATIONS.
LE PRESENT APPAREIL NUMVERIQUE N’EMENT PAS DE
BRUITS RADIOELECTRIQUES DEPASSANT LES LIMITES
APPLICABLES AUX APPAREILS NUMERIQUES DE LA CALSSE B
PRESCRITES DANS LE REGLEMENT SUR LE BROUILLAGE
RADIO ELECTRIQUE EDICTE PAR LE MINISTERE DES COMMU-
NICATIONS DU CANADA.
WARNING - INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
VORSICHT! - UNSICHTBARE LASERTRAHLUNG TRITT AUS,
WENN DECKEL GEÖFFNET UND WENN SICHERHEITSVERRIEGELUNG
ÜBERBRÜCKT IST. NICHT DEM STRAHL AUSSETZEN.
ADVARSEL - USYNLIG LASERSTRÅLING VED ÅBNING, NÅR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ
UDSÆTTELSE FOR STRÅLING.
ADVARSEL - USYNLIG LASERSTRALING NÅR DEKSEL ÅPNES OG
SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
VARING - OSYNLING LASERSTRÅLNING NÄR DENNA DEL ÄR
ÖPPNAD OCH SPÄRRAR ÄR URKOPPLADE. STRÅLEN ÄR FARLIG.
VARO! - AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET
ALTTINA NÄKTMÄTONTÄ LASERSÄTEILYLLE. ÄLÄ KAISO SÄTEESEEN.
Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the Double-D symbol are trade-
marks of Dolby Laboratories. Confidential unpublished works. ©1992-1997 Dolby Laboratories, Inc. All rights
reserved.
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REAR PANEL CONNECTIONS (Figure 1.)
7
8
10
9
14
13
2
1
3
4
5
11
6
12
FRONT PANEL CONNECTIONS (Figure 2.)
751
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REMOTE CONTROL
(Figure 3.)
(Figure 4.)
1
2
3
4
6
7
8
5
9
(Figure 5.)
10
11
(Figure 6.)
1
2
3
Batterij niet
weggooien maar
inleveren als KCA
NL
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SIMPLE T 751 SYSTEM (Figure A.)
TV
VIDEO
STEREO AUDIO
TAPE
IN / OUT
CD
IN
VCR
IN / OUT
SOPHISTICATED T 751 SYSTEM (Figure B.)
AUDIO / GAMES
TV
IN
VIDEO
STEREO AUDIO
SUBWOOFER
TAPE
IN / OUT
CD
IN
VCR
IN / OUT
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THE OPTICAL DIGITAL INPUT 1 IS LINKED TO THE VIDEO 1 INPUT.
THE COAXIAL DIGITAL INPUT 2 IS LINKED TO THE VIDEO 2 INPUT.
VIDEO
STEREO AUDIO
COMPOSITE
VIDEO OUT
DIGITAL
COAXIAL
OUT
DVD
S VIDEO OUT
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NAD T 751 SURROUND SOUND RECEIVER
GB
FM ANTENNA
NOTES ON INSTALLATION.
A ribbon wire FM antenna is included and should
be connected to the FM connector at the rear of the
unit (Fig. 4) using the ‘balun’ adapter supplied. The
ribbon aerial should be mounted on a vertical surface
and placed so that it forms a ‘T’.
Your NAD T 751 should be placed on a firm, level
surface. Avoid placing the unit in direct sunlight or
near sources of heat and damp.
Allow adequate ventilation. Do not place the unit on
a soft surface like a carpet. Do not place it in an
enclosed position such a bookcase or cabinet that
may impede the air-flow through the ventilation slots.
Experiment with placement of the antenna to find
the position that gives the best signal strength and
lowest background noise. An inadequate FM signal
normally results in high levels of hiss, especially in
stereo, and interference from external electrical
sources. In areas of poor FM reception, the tuner
section’s performance can be improved by using an
externally mounted FM antenna. A qualified aerial
installer will be able to advise and fit a recommended
aerial for your reception conditions.
Make sure the unit is switched off before making
any connections.
The RCA sockets on your NAD T 751 are color
coded for convenience. Red and white are Right and
Left audio respectively, orange for digital input, yellow
for Video Composite and NAD Link.
Use high quality leads and sockets for optimum
performance and reliability. Audio RCA leads will
function correctly for video signals, although it is rec-
ommended to use dedicated video leads where pos-
sible. For the digital inputs use dedicated leads for
digital signal transfer. Ensure that leads and connec-
tors are not damaged in any way and all connectors
are firmly pushed home.
2. AM STEPPING FREQUENCY
Worldwide models are equipped with a switch that
controls the AM band tuning steps. Please set this
switch to match the AM band tuning step frequency
as below:
• 120V version : 10kHz
• 230V version : 9kHz
For best performance, use quality speaker leads of
16 gauge (1.5mm) thickness or more.
3. TAPE 1 & CD INPUT
If the unit is not going to be used for some time,
disconnect the plug from the AC socket.
TAPE 1
Connections for analogue recording and playback
to an audio tape recorder of any type, such as a cas-
sette, reel-reel, DAT, MD or DCC. Using twin RCA-to-
RCA leads, connect to the left and right ‘Audio
Output’ of the tape machine to the TAPE 1 IN con-
nectors for playback. Connect the left and right ‘Audio
Input’ of the tape machine to the TAPE 1 OUT con-
nectors for recording.
Should water get into your NAD T 751, shut off the
power to the unit and remove the plug from the AC
socket. Have the unit inspected by a qualified service
technician before attempting to use it again.
Do not remove the cover, there are no user-ser-
viceable parts inside.
Use a dry soft cloth to clean the unit. If necessary,
lightly dampen the cloth with soapy water. Do not use
solutions containing benzol or other volatile agents.
CD INPUT
Input for CD player (analogue audio signal) or other
line-level signal source. Use a twin RCA-to-RCA lead
to connect the CD player’s left and right ‘Audio
Outputs’ to this input.
REAR PANEL CONNECTIONS (Figure 1.)
1. FM & AM ANTENNA
4. 5.1 CHANNEL INPUTS
AM ANTENNA
Inputs for the multi-channel audio signals from an
external decoder, such as an MPEG decoder or a
DVD player with integrated decoder. Use two twin
RCA-to-RCA lead to connect the decoder’s front left
and right ‘Audio Outputs’ to the Front left and right
inputs, and the decoder’s Surround left and right out-
puts to the Surround left and right inputs. Use a third
twin RCA-to-RCA lead to connect the decoder’s sub-
woofer output to the Subwoofer input and the
decoder’s Center channel output to the Center chan-
nel input. Make sure you to follow color coding of the
plugs to ensure that both Center and Subwoofer are
connected correctly, for instance, use the red plugs at
either end to connect the center channel and the
white plugs for the subwoofer channel.
An AM loop antenna is supplied with the T 751 and
is required for AM reception. Open the clip terminal
lever and insert the wire from the antenna. Closing
the lever will lock the wire in place (Fig. 5). Test vari-
ous positions for the antenna, but always ensure the
loop is placed vertically for best reception. Placing the
antenna close to large metal items such as metal
shelves or radiators may interfere with reception.
NOTE:
When reception is not satisfactory using the sup-
plied AM loop antenna alone, connection of an exter-
nal antenna is recommended. Do not connect any-
thing other than a loop antenna to the AM ANTENNA
terminal. Do not remove the AM loop antenna. The
antenna cable to the loop antenna must not exceed 3
meters.
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Digital Audio Input 1 allows for connection of a digi-
tal source with an Optical output. Use a cable termi-
nated with a TOS Link connector. This digital input is
linked to the Video 1 input.
5. VIDEO 1 - VIDEO 4 (AUDIO & VIDEO)
Apart from the audio signal, these inputs will also
accept a video signal which will be routed to the
Monitor Out sockets (No. 8) for a television or video
projector. The Video 1, 2 and 3 inputs also have the
option of a Video Composite connection (using the
yellow RCA socket) or an S-Video connection (using
the Mini-Din connector).
Digital Audio Inputs 2 & 3 allow for connection of a
digital source with a Coaxial digital output. Use a
cable with the right impedance, specifically designed
for the transfer of digital signals. These digital inputs
are linked respectively to VIDEO INPUT 2 and
VIDEO INPUT 3.
The S-Video standard allows for higher quality
video signal transfer when compared to the Video
Composite standard. If your video components have
an S-Video connector use dedicated S-Video leads to
connect them to the T 751 in the same way as
described with the Video composite equivalents.
7. AUDIO PRE-OUTS / SUBWOOFER OUT
AUDIO PRE-OUTS
The NAD T 751 receiver has five power amplifiers
built-in to power all the speakers connected to it (Left,
Right, Center, Left Surround, Right Surround). It is
also possible to use the T 751 as a pre-amplifier to
drive external power amplifiers. This way, you use all
the control functions the T 751 provides, such as
input select, surround mode, volume, tone controls,
etc., but the external power amplifier actually powers
the speaker connected to it instead of the T 751’s
integrated power amplifier for that channel.
A video signal fed to an S-Video input socket will
be available on both the S-Video Monitor Out and
Video composite Monitor Out.
VIDEO 1 & VIDEO 2 (AUDIO)
Inputs for the audio playback and video signal from
a video device such as a stereo TV, DVD player,
satellite cable TV receiver or a Laser Disc. Using twin
RCA-to-RCA leads, connect to the left and right
‘Audio Out’ of the video device to these inputs. Using
a single RCA-to-RCA lead (Video Composite) or S-
Video lead, also connect the video output of the video
device; refer also to the description of S-Video and
Video Composite in section No. 5 of this chapter.
VIDEO 1 & VIDEO 2 can be used for video playback
only. Use VIDEO 3 or VIDEO 4 if you want to connect
a VCR for recording and playback through the T 751.
Connect the RCA-to-RCA leads from the Front left
and Right, Center, and/or Surround Left and Right
Audio pre-out connectors to the external amplifiers.
Connect speakers to the external amplifiers.
NOTES:
Never connect the T 751’s speaker outputs and the
speaker outputs of an external amplifier to the same
speakers. When headphones are inserted the signals
from all audio pre-out outputs will be muted.
The optical Digital Input 1 (No. 6) is linked to the
Video 1 input. Select Video 1 to hear a source con-
nected to Digital Input 1.
Before making any connections, check that the T
751 and the power amplifiers it will be connected to
are switched off. With volume turned down to a low
level, switch power on only after all connections have
been made.
The coaxial Digital Input 2 (No. 6) is linked to the
Video 2 input. Select Video 2 to hear a source con-
nected to Digital Input 2.
VIDEO 3 & VIDEO 4 (AUDIO)
SUBWOOFER OUT
Connections for the audio recording and playback
to a VCR or other video recorder. Using twin RCA-to-
RCA leads, connect to the left and right ‘Audio Out’ of
the VCR to the VIDEO 3 or VIDEO 4 IN connectors
for playback. Connect the left and right ‘Audio In’ of
the VCR to the VIDEO 3 or VIDEO 4 OUT connectors
for recording. Using a single RCA-to-RCA (Video
Composite) lead or S-Video lead, also connect the
video output of the VCR to Video In (only Video
Composite for Video 4) for Video playback. Connect
the Video Input of the VCR to Video Out of the NAD T
751 receiver for recording of video signals. Refer also
to the description of S-Video and Video Composite
above in this section.
Unlike for the full range five channels as described
above, there is no power amplifier built-in for an addi-
tional subwoofer. The Subwoofer pre-out allows for
connection to a sub-bass speaker system with its
own external or integrated power amplifier (“active”
subwoofers).
NOTE:
When headphones are inserted the signal from the
Subwoofer output will be muted.
8. MONITOR OUT
Composite Video and S-Video outputs for connect-
ing a TV or Video Monitor to view video sources con-
nected to VIDEO 1 to VIDEO 5. Using a Video RCA-
to-RCA lead, connect the ‘Video Line In’ on the TV or
monitor to the MONITOR OUT.
6. DIGITAL AUDIO INPUTS
The T 751 has three digital audio inputs to allow for
connection of DVD, CD or other digital sources:
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Note that an S-Video signal from Video input 1
through 3 will also be available as a Video Composite
signal on Monitor out, if the corresponding source is
selected. The composite video input signals from
Video 1 to 5 (No. 5; yellow sockets) will also be avail-
able as S-Video signal on the Monitor Out socket. If
you use both S-Video and Video composite sources,
you will only need to connect the S-Video Monitor Out
to the television or projector.
NOTE:
The Center and/or Surround speakers must be
selected as Large or Small in the Set-up menu
“SPEAKER SELECTION” when speakers are con-
nected to these outputs. Refer also to chapter “On
Screen Display (OSD)” for more information.
10. SOFT CLIPPING
9. FRONT, CENTER & SURROUND SPEAKERS
When any amplifier is driven beyond it’s power
output capabilities, a hard, distorted sound can be
heard on very loud sounds. This is caused by the
amplifier cutting off or ‘hard clipping’ the peaks of
sound that it was not designed to reproduce. The
NAD Soft Clipping circuit gently limits the output of
the system to minimize audible distortion if the ampli-
fier is overdriven.
FRONT SPEAKERS
Connect the right speaker to the terminals market
‘R +’ and ‘R -’ ensuring that the ‘R +’ is connected to
the ‘+’ terminal on your loudspeaker and the ‘R -’ is
connected to the loudspeaker’s ‘-’ terminal. Connect
the terminals marked ‘L +’ and ‘L -’ to the left speaker
in the same way.
Always use heavy duty (16 gauge; 1.5mm or thick-
er) stranded wire to connect loudspeakers to your T
751.
If your listening involves moderate power levels you
may leave the Soft Clipping switch off. If you are like-
ly to play at high levels that exceed the amplifier’s
power capability, then switch Soft Clipping on.
Unscrew the speaker terminal’s plastic bushing.
Insert the pin or bare cable end into the hole of the
terminal and then secure the cable by tightening
down the terminal’s bushing (Fig. 6).
To avoid any danger of bare metal from the speak-
er cables touching the back panel or another connec-
tor, ensure that there is only 1/2” (1.27cm) of bare
cable or pin and no loose strands of speaker wire.
11. NAD-LINK IN OUT
The NAD-Link connector is used to pass com-
mands from other units fitted with NAD-Link connec-
tors. This allows centralized control of a complete
system, and also allows some of the basic functions
of other NAD components (such as a CD player or
cassette deck) also equipped with NAD-Link to be
controlled with the receiver’s remote control. To func-
tion with such other units, connect the T 751’s NAD-
Link Out to the NAD-Link In on the other unit. NAD-
Link connectors can be daisy-chained, IN to OUT, so
that a whole system can be controlled from the
remote control facilities of one unit.
NOTE:
This unit is designed to produce optimum sound
quality when speakers with impedance within the
set’s ranges are connected. Please check the follow-
ing information and choose speakers with the correct
impedance for the connections.
FRONT SPEAKERS:
CENTER SPEAKER:
4 ohms min. per speaker
4 ohms min.
SURROUND SPEAKERS: 4 ohms min. per speaker
CENTER SPEAKER
This connects the center loudspeaker that is used
when the T 751 is operated in Dolby* Digital, DTS,
Dolby Pro Logic, EARS surround sound mode or with
the 5.1 Ch. input selected.
12. SWITCHED POWER OUTLETS
(120V North American versions only)
The AC power cords of other stereo components,
such as a CD player, may be plugged into these
accessory outlets.
Connect the center speaker in the same way as
described with FRONT SPEAKERS above.
SURROUND SPEAKER
This connects the Surround loudspeakers that are
used when the T 751 is operated in Dolby Digital,
DTS, Dolby Pro Logic, EARS Surround sound modes
or with the 5.1 Ch. input selected.
Components plugged into the outlets will be
switched on and off as the T 751 is switched from
stand-by or off to on and vice versa.
Connect the surround speakers in the same way as
described with FRONT SPEAKERS above.
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NOTE:
The total power consumption of any components
connected to the AC outlets may not exceed 120
Watts. Never connect the mains lead of a power
amplifier to either outlets of the NAD T 751.
In Stand-by mode the T 751 uses very little power.
However, it is recommended that you switch the unit
totally off if it is not going to be used for more than a
couple of days. Switch off completely by pressing the
POWER button on the front panel (No. 1), all lights
will extinguish.
NOTE:
Press this button to switch the unit on. To switch
the unit off, press this button again.
The AC outlets should be used with units with a
COMBINED power consumption of no more than 120
Watts.
2. STAND-BY
This green LED will light up when the receiver is
switched On, but in Stand-by mode. Refer to section
1 in this chapter for more information.
13. AC POWER CORD
After you have completed all connections to the
amplifier, plug the AC line cord into a “live” wall sock-
et.
The LED will also light up when the receiver
receives a remote control command from the sup-
plied handset.
14. COOLING FAN
The cooling fan allows T 751 to deliver high
amounts of power without the unit becoming too hot.
The fan will only operate when the temperature of the
internal components starts to become hot.
3. DISPLAY
The T 751 supports RDS PS and RDS RT. With
stations carrying RDS information, “RDS” will light up
in the display panel, and the station’s RDS name is
automatically displayed (RDS PS).
NOTE:
Ensure that the air outlets of the fan aren’t blocked
in any way.
Some radio stations, which support RDS, also
transmit additional information, known as Radio Text
(RDS RT). To view this information, use the
DISPLAY button.
FRONT PANEL CONTROLS (Figure 2.)
1. POWER
Press the POWER button to switch the receiver to
its ‘Stand-by’ mode. The Stand-by indicator (No. 2)
over the power button will light up. On the front panel,
press any of the input selector buttons (No. 11) to
switch the receiver on. From the remote control,
press the green Stand-by button (No. 1 on remote
control drawing) to switch the unit on. The display will
light up indicating which input was selected; the
Stand-by indicator will extinguish.
With stations carrying RDS information, the DIS-
PLAY button scrolls between three different display
modes, each successive push of the button engages
the next one of the three modes:
a) In the default mode, the station’s RDS name is dis-
played, Program Service (PS; normally the sta-
tion’s calling letters, BBC R3, for instance).
b) From the default mode, press the button once to
view Radio Text (RT). This can be additional infor-
mation such as the presenter’s or program’s name;
what song is playing, etc. This text scrolls continu-
ously over the 8 alphanumeric display segments. It
takes a few seconds for the tuner to gather the RT
information, so immediately after tuning to a sta-
tion and selecting to view RT the display will indi-
cate “NO TEXT” and default to the station name. If
no RT information is available, the display will also
show “NO TEXT” for three seconds before revert-
ing to the default mode.
Pressing the POWER switch again will turn the unit
OFF completely. The NAD T 751 receiver uses a
memory back-up system to store surround sound trim
settings and Preset station information for the tuner
section. This information is retained for several
weeks, even the unit is switched off completely or
unplugged.
REMOTE CONTROL:
STAND-BY button (green, No. 1 on remote control
drawing):
Press this button to switch the unit from operating
to the Stand-by mode and vice versa. Press this but-
ton again to switch to unit on from Stand-by; the last
selected source will be indicated in the display.
c) Press the button from the display RT mode to dis-
play the station frequency. Press again to return to
the default mode (a).
NOTE:
When the DISPLAY button is pressed when tuned
to a non-RDS station the display will show “NO
NAME” for three seconds before reverting to the
default display:
Stand-by mode is indicated by the Stand-by indica-
tor (No. 2) just over the green POWER button on the
front panel (No. 1).
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The DISPLAY button toggles the display to show
either the station frequency or user entered station
name. If no user name was entered the display will
just flash once.
7. DOWN / UP 1and 2
The function of these buttons depends on the tun-
ing mode selected with the PRESET/TUNE button
(No. 6). The PRESET/TUNE button toggles between
the two operation modes:
a) Preset mode (indicated in the display area): Press
the “ 1 ” (down) button to scroll to a lower number
Preset; press the “ 2 ” (up) button to scroll to a
higher Preset number. This is a “wrap-around”
function, so that going from the highest number
Preset, the tuner will go to the lowest Preset num-
ber or vice-versa when tuning either up or down.
4. FM MUTE / MONO
This button combines two functions; it switches the
tuner from Stereo to Mono and disengages the mut-
ing circuitry at the same time. The muting circuit will
mute the tuner in between radio stations when
searching or tuning. This way the tuning noise is
avoided.
b) Tune mode: Press the “ 1 ” (down) or “ 2 ” (up)
button for more than 1/2 second to engage auto-
matic tuning respectively up or down the frequency
band. The tuner will search automatically for the
first reasonably strong radio station, where it will
stop. Press the Down/Up button again for 1/2 sec-
ond to start searching again.
Very weak radio station signals however may be
suppressed by the muting circuit. if such a very weak
station is in stereo it will have a high level of back-
ground hiss. Switching to Mono Mode and disengag-
ing the muting circuit by depressing the FM
MUTE/MONO button will allow the station to be heard
and will cancel most or all of this background noise.
In normal operation the mute circuit is engaged, the
display indicates “FM MUTE”. Press the FM
MUTE/MONO button to disengage the muting circuit
and switch from stereo to mono reception. “FM
MUTE” will extinguish in the display. Also, “STEREO”
will extinguish if a stereo broadcast was received.
Press the FM MUTE/MONO switch again to return to
Auto Stereo FM operation.
NOTE:
Automatic tuning is available on both FM and AM.
By briefly tapping the “ 1 ” (down) or “ 2 ” (up) but-
tons you can engage manual tuning respectively
down or up the frequency band for precise tuning to a
specific frequency. With each successive tap of the
keys, the tuner will take 0.1 MHz steps (120V ver-
sion) or 0.05 MHz steps (230V version) on FM so you
can accurately tune into the desired frequency. For
AM the tuning steps are factory set at 9 kHz for the
230V version or 10 kHz for the 120V version). Set the
AM STEP switch on the back panel (No. 2 in back
panel drawing) to manually set the AM tuning steps to
9 or 10 kHz (refer also to chapter “Rear Panel
Connections” section 2: “AM stepping frequency”).
In combination with the MEMORY button (No. 5) a
preset number can be emptied. (Refer to the sepa-
rate chapter “Storing and Recalling Presets” for more
information.)
5. MEMORY
The MEMORY button is used to store stations into
the Preset Memory (1-30 Presets on FM, 1-10
Presets on AM), used in conjunction with the
DOWN/UP (No. 7) buttons on the front panel. In com-
bination with the FM MUTE/MONO button (No. 4) a
preset number can be emptied. When Memory is
active, the Preset number flashes and the red “MEM-
ORY” indicator is shown in the Display Panel. If no
other button is pressed within 10 seconds “MEMO-
RY” will stop flashing and the receiver will default to
its previous state.
This tuning mode can also be useful when trying to
receive a radio station which is too weak for the auto
search mode. When tuned accurately to a station,
“2TUNED1” will light up in the display. Very weak
radio station signals however may be suppressed by
the muting circuit. If such a very weak station is in
stereo it will have a high level of background hiss.
Switching to Mono Mode and disengaging the muting
circuit by depressing the FM MUTE/MONO button
(No. 4) will allow the station to be heard and will can-
cel most or all of this background noise.
Refer to the separate chapter “Storing and recalling
Presets” for more information.
Refer to the separate chapter “Storing and
Recalling Presets” for more information.
6. PRESET / TUNE
The PRESET/TUNE button toggles between the
Preset and Tune mode. When Preset mode is select-
ed, “PRESET” lights up in the display area.
8. VFL DISPLAY
Vacuum Fluorescent Display. The display area will
show all vital information when the unit is operational.
Up to 40 Presets, either AM (10 Presets) or FM (30
Presets), can be stored.
9. VOLUME
The Volume control adjusts the overall loudness of
the signals being fed to the loudspeakers. Unlike con-
ventional controls, the T 751’s volume control doesn’t
Refer also to separate chapter “Storing and
Recalling Presets” for more information.
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have a start of end position. Volume can also be
adjusted from the remote control handset using the
MASTER VOLUME Up or Down buttons (No. 4 in
remote control drawing). The Volume control does
not affect recordings made using the Tape, Video 3
and Video 4 outputs but will affect the signal going to
the Pre-amp output (Audio Pre Out). The volume
level is indicated in the display panel when it is being
adjusted. After three seconds the display defaults to
its previous status. Volume setting can range from -
The name of the Input and Surround Mode will be
shown in the Display Panel.
VIDEO 1
Video 1 selects the signal from a TV/Satellite/Cable
receiver or DVD player connected to VIDEO 1 as the
active input. “VIDEO-1” is shown in the Display Panel
when selected.
to +18dB ······
∞
The Digital Input 1 is linked to the Video 1 input
(marked Digital In on back panel; No. 6). Digital Input
1 allows for connection of a digital source with an
Optical digital output. Whenever Video 1 is selected,
Digital Input 1 will also be selected; in the display the
“DIGITAL 1” indicator will start to blink. If a digital
audio signal is detected, the “DIGITAL 1” indicator will
stop blinking and remain lit. If no digital audio signal
is detected, “DIGITAL 1” indicator will cease blinking
and extinguish.
On the remote control handset, press the MUTE
button (No. 3) to temporarily switch off the sound to
the speakers and headphones. Mute mode is indicat-
ed by “MUTING” flashing in red in the display area.
Press MUTE again to restore sound. Mute does not
affect recordings made using the Tape, Video 3 and
Video 4 outputs but will affect the signal going to the
Pre-amp output (Audio Pre Out).
VIDEO 2
10. HEADPHONE SOCKET & VIDEO 5 INPUT
Video 2 selects the signal from a TV/Satellite/Cable
receiver or DVD player connected to VIDEO 2 as the
active input. “VIDEO-2” is shown in the Display Panel
when selected.
HEADPHONE SOCKET
A 1/4” stereo jack socket is supplied for headphone
listening and will work with conventional headphones
of any impedance. The volume and tone controls are
operative for headphone listening. Use a suitable
adapter to connect headphones with other types of
connectors such as 3.5mm stereo ‘personal stereo’
jack plugs.
The Digital Input 2 is linked to the Video 2 Input
(marked Digital In on back panel; No. 6). Digital Input
2 allows for connection of a digital source with a
Coaxial digital output. Whenever Video 2 is selected,
Digital Input 2 will also be selected; in the display the
“DIGITAL 2” indicator will start to blink. If a digital
audio signal is detected, the “DIGITAL 2” indicator will
stop blinking and remain lit. If no digital audio signal
is detected, “DIGITAL 2” indicator will cease blinking
and extinguish.
Inserting a headphone will automatically turn off all
speakers and signals from the Audio Pre-Out sock-
ets.
The sound from the EXT. 5.1 CH input is not avail-
able on the headphones socket.
VIDEO 3 & VIDEO 4
NOTES:
Video
3
&
4
select the signal from
a
In the OSD menu “Speaker settings” be sure to
have selected and adjusted a preset with “MAIN
SPEAKERS” set to “LARGE”. If set to “SMALL”, bass
reponse will be limited. Refer also to Chapter “On
Screen Display (OSD)” for more information.
TV/Satellite/Cable receiver, DVD player or VCR con-
nected to VIDEO 3 or VIDEO 4 as the active input.
“VIDEO-3” or “VIDEO-4” is shown in the Display
Panel when selected. The Video 3 & 4 inputs also
have video and analogue audio outputs specifically
for recording video devices.
Listening at high levels can damage your hearing.
The Digital Input 3 is linked to the Video 3 input
(marked Digital In on back panel; No. 6). Digital Input
3 allows for connection of a digital source with a
Coaxial digital output. Whenever Video 3 is selected,
Digital Input 3 will also be selected; in the display the
“DIGITAL 3” indicator will start to blink. If a digital
audio signal is detected, the “DIGITAL 3” indicator will
stop blinking and remain lit. If no digital audio signal
is detected, “DIGITAL 3” indicator will cease blinking
and extinguish.
VIDEO 5 INPUT
For easy and temporary connection you can con-
nect a camcorder (playback only) or video game con-
sole. If the game console or camcorder is mono, con-
nect the audio lead to the R (Right) audio socket.
11. AUDIO & VIDEO INPUT SELECTORS &
SURROUND MODE
These buttons select the active video and audio
input to the T 751 and the audio signal sent to the
loudspeakers, Tape, Video 3 & 4 and TV monitor out-
puts. Video inputs 1, 2 and 3 also select respectively
the Digital Inputs 1, 2 and 3.
VIDEO 5
Selects the camcorder or video game console con-
nected to the Video 5 front panel inputs as the active
input. “VIDEO-5” is shown in the Display Panel when
selected.
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EXT. 5.1
Surround Mode if the source is either Dolby Digital or
DTS and a Digital Audio input is used.
Selects the multi-channel output signal from the
DVD player or external decoder source (such as
MPEG, for instance) connected to the 5.1 Ch. input
as the active input.
An external source such as a decoder or DVD play-
er with a decoder built-in (MPEG for instance) can be
connected to the 5.1Ch input (No. 4 on the front
panel). When the EXT 5.1 CH. input is selected, no
other surround modes are available.
NOTE:
No Ext. 5.1 audio signal is available from head-
phones socket, the Tape, Video 3 and Video 4 out-
puts when the Ext. 5.1. input has been selected.
To obtain the best performance possible it is impor-
tant that the system and all speakers have been set
up correctly. Refer to the chapters “On Screen
Display” and “Setting Up the Surround System”.
SURROUND MODE
With the Surround Mode buttons the available sur-
round sound modes can be selected. The selected
Surround mode is permanently indicated in the dis-
play area and is also shown for 3 seconds in the
large Star-Burst section of the display. The Surround
Mode buttons scroll through the available surround
sound modes:
TAPE MONITOR
Selects the output from a tape recorder when play-
ing back tapes or monitoring recordings being made
through the Tape sockets. Press the TAPE MONI-
TOR button once to select it and again to return to
the normal input selection.
With any of the Digital Inputs 1, 2 & 3 (press Video
1, 2 or 3 respectively to select), the T 751 automati-
cally recognizes if the selected source carries a Dolby
Digital ™ or DTS ™ signal. When no Dolby Digital or
DTS signal is available, the Surround Mode buttons
scrolls through the other available surround sound
modes:
The Tape Monitor function does not override the
current input selection. For example, if the CD is the
active input when Tape Monitor is selected, the CD
signal will continue to be selected and is sent to the
Tape Out, Video 3 and Video 4 Out sockets, but it is
the sound from recorder connected to Tape that will
be heard on the loudspeakers. When Tape Monitor is
selected, “TAPE MONITOR” will remain lit until Tape
Monitor is disengaged again.
Stereo
Pro Logic
Ears
Stereo, etc.
With either Dolby Digital or DTS surround mode
engaged, the Dolby Pro Logic and Ears surround
modes cannot be selected.
CD
Selects the CD as the active input.
Dolby Digital and DTS has six independent chan-
nels available in total: Left, Center, Right, Surround
left, Surround Right and an “Effects Channel”
(Subwoofer).
FM
Selects FM radio. FM is also automatically selected
when an FM Preset is selected.
AM
The Dolby Digital signal allows for several channel
configurations.
Selects AM radio. AM is also automatically selected
when an AM Preset is selected.
DTS digital surround is an Encode/Decode system
that currently delivers six discrete channels (5.1) of
“Master-Quality” up to 24-bit audio.
VIDEO OUTPUT
The video signal available on the S-Video and
Video Composite outputs is dependent on the select-
ed video input (VIDEO-1, VIDEO-2, VIDEO-3,
VIDEO-4, VIDEO-5). However, when one of the
audio-only sources is selected (FM, AM, CD, Tape
Monitor or Ext. 5.1) the last selected video signal
from one of the video inputs will be present on these
outputs. This way you can watch a DVD player or
video whilst listening to the CD player.
Dolby Pro Logic decodes the center and surround
sound signals embedded in stereo movie sound
tracks from e.g. video, Laser Disc or TV. To decode
correctly, the source must be a Dolby Surround or
Dolby Stereo soundtrack.
In the EARS (Enhanced Ambiance Retrieval
System) Surround Mode, a realistic level of ambience
of surround sound is added to a normal stereo source
such as a CD or FM radio.
The display indicates which video signal is routed
to the MONITOR OUT sockets (No. 8 on back panel).
12. BASS & TREBLE CONTROLS
NOTES:
The T 751 is fitted with BASS and TREBLE tone
Dolby Digital or DTS are only available as a
controls to adjust the overall tonality of your system.
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The 12 o’clock position is ‘flat’ with no boost or cut
and a detent indicates this position.
Deleting a stored Preset:
You can empty a Preset by deleting the stored
information:
• Select the Preset to be emptied.
Rotate the control clockwise to increase the
amount of Bass or Treble. Rotate the control anti-
clockwise to decrease the amount of Bass or Treble.
These controls affect the Left and Right Front speak-
ers. The Tone controls do not affect recordings made
using the Tape or Video line outputs but will affect the
signal going to the Pre-amp outputs (Audio Pre Out).
• Press the MEMORY button (No. 5), followed by
the FM MUTE/MONO button (No. 4). The Preset will
then be deleted and ‘--’ appears as the Preset num-
ber.
You can also store a new station into a used
Preset, by simply going through the Preset storing
process and placing a new station over the existing
one.
STORING AND RECALLING PRESETS
To store a Preset:
REMOTE CONTROL (Figure 3.)
• Tune to the radio station you wish to enter into a
Preset (refer to chapter “Front Panel Controls”; sec-
tions 6 and 7). If the station is transmitting RDS infor-
mation, the RDS indicator will light up and station ini-
tials will be shown in the Display Panel. If a non-RDS
station is found, then just the frequency will be
shown.
Apart from all the key functions, the T 751’s
Remote Control handset also gives access to func-
tions not available on the front panel. It also has addi-
tional controls to remotely operate NAD Cassette and
CD machines. It will operate up to a distance of 16ft
(5m).
• To store that station as a Preset, press MEMORY
(No. 5). “MEMORY” and the preset section in the dis-
play panel will start to flash. If no other button is
pressed within 10 seconds, “MEMORY” will stop to
flash and the receiver will default to its previous state.
Alkaline batteries are recommended for maximum
operating life. Two AAA (R 03) batteries should be fit-
ted in the battery compartment at the rear of the
Remote Control handset. When replacing batteries,
check that they have been put in the right way round,
as indicated on the base of the battery compartment.
• Press either the “ 1” (down) or “ 2” (up) button to
select which Preset number you wish to assign to the
station (from 1 to 30 on FM and 1 to 10 on AM),
shown as a flashing number in the Display Panel, and
then press MEMORY (No. 5) again. The Memory light
in the Display Panel will go out and the station is now
stored in your NAD T 751’s memory.
The EXT 5.1, VIDEO 1 TO 5, TAPE MON., AM, FM
and CD Input selector buttons, and PRESET/TUNE,
DOWN/UP and DISPLAY buttons perform the same
function as those on the front panel of the T 751.
There are a few differences and extra functions with
the remote control handset however (numbers refer
to Fig. 3):
To exit the Memory mode without storing a station,
leave all the tuner controls untouched; the Memory
mode will automatically cancel itself after 10 seconds.
The Memory Presets have a memory back-up, so
they will remain stored for several weeks even if the
Receiver is switched off or unplugged from the mains
supply.
1. STAND-BY
Press this green button to switch the unit from
operating to the Stand-by mode and vice versa:
Press this button again to switch the unit on from
Stand-by; the last selected source will be indicated in
the display.
NOTE:
You can enter a new station into an unused Preset
or over-write an existing programmed Memory
Preset. By doing this you will replace the radio station
previously held on that Preset number.
2. SLEEP
Press SLEEP to make the T 751 automatically
switch off after a preset number of minutes. Pressing
the SLEEP button once will set the sleep time to 90
minutes, after which the T 751 will automatically
switch off into Standby mode. Sleep mode is shown
on the Display Panel. To adjust the Sleep Delay,
press the SLEEP button, each consecutive press will
reduce the sleep time in 30-minute increments, as
shown in the Display Panel. To cancel the Sleep
mode, continue pressing the SLEEP button until the
sleep time returns to 0 minutes. Pressing the
POWER on the front panel (No.1) or STAND-BY but-
ton will also cancel the Sleep mode.
Recalling a Preset station:
• To select a Preset station, select the Preset mode
by pressing the PRESET/TUNE button (No. 6) until
“PRESET” lights up in the display.
• Press either the “ 1 ” (down) or “ 2 ” (up) button
(No. 7) until the right Preset is found and shown in
the Display Panel.
NOTE:
Any unused Presets will be skipped.
3. MUTE:
Press the MUTE button to temporarily switch off the
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sound to the speakers and headphones. Mute mode
is indicated by “MUTING” flashing in red in the dis-
play area. Press MUTE again to restore sound. Mute
does not affect recordings made using the Tape out-
puts but will affect the signal going to the Audio Pre-
outs.
7. CHANNEL SELECT
Although the T 751 is correctly set-up it may some-
times be desirable to make minor adjustments to suit
particular software. Pressing the CHANNEL button
allows for direct adjustment of Center, Rear and
Subwoofer levels. Press the CHANNEL button to
scroll to the next speaker. Both display panel and
OSD show which speaker can be adjusted. Use the
cursor 1 and 2 button to respectively decrease or
increase the level for the current speaker.
NOTE:
When the unit is in mute mode, any adjustment of
the VOLUME CONTROL on the front panel (No.9)
will release the muting, i.e. the original volume level
will be resumed.
Pressing the CHANNEL button also gives access
to CHANNEL BALANCE in the OSD directly:
CENTER
REAR R & L
SUB
OFF
Refer also to the chapter “Setting Up the Surround
Sound System” for more information.
4. MASTER VOLUME
Master Volume 3 or 4 respectively increases or
decreases the volume setting for all speakers. The
display panel will indicate the level set. The Volume
control does not affect recordings made using the
Tape and Video, or Tape, Video 3 and Video 4 out-
puts but will affect the signal going to the Pre-amp
output (Audio Pre Out).
8. DYNAMIC RANGE
The DYN. R button, which can be used only in
combination with a Dolby Digital source, incremental-
ly reduces the audio track’s dynamic range in four
steps (100%, 75%, 50% and 25%) to allow for com-
fortable listening under a variety of conditions. The
normal or default position is 100%.
5. CURSOR 3, 4, 1AND 2AND ENTER
The four Cursor buttons are used to navigate the
cursor when using the menus with the On Screen
Display and the ENTER is used to confirm the choice.
Press 3 to move cursor up, 4 to move cursor down,
1 to move cursor left, 2 to move cursor right. Then
press ENTER to access.
To adjust the dynamic range, each consecutive
press of the DYN. R button will reduce the value in
25% increments, as shown in the alpha-numeric dis-
play section.
NOTE:
Although we usually prefer to reproduce a source’s
full dynamic range (the difference between very loud
and very soft sounds), it may occasionally be desir-
able to reduce the dynamic range. For example,
when playing a movie late at night, loud explosions
might wake sleeping family members. Simply turning
the volume control down would probably make a
whisper in the next scene inaudible. The DYN. R but-
ton solves this dilemma by progressively lowering the
volume of loud peaks while increasing the level of
softer sounds.
With the four cursor buttons the relative volume
level trims for center, left and right surround channels
can be adjusted. Press the CHANNEL button (No. 7)
to select the channel for which you wish to adjust the
level.
Refer also to chapter “On Screen Display” and
“Setting Up the Surround Sound System” for more
information.
6. TEST
9. MODE
Pressing the TEST button, engages the Test signal
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
Front Left, Center, Front Right, Rear Right, Rear Left,
to subwoofer in continuous cycles. If an adjustment in
setting 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 decrease or increase the level
for the current speaker. Press the TEST button again
to leave or cancel the Test mode, any changes will be
memorized automatically.
The MODE button scrolls through the available sur-
round sound modes. The button functions in the
same way as the SURROUND MODE button on the
T 751 front panel (No. 11 on front panel drawing).
The selected Surround mode is permanently indi-
cated in the display area and is also shown for 3 sec-
onds in the alpha-numeric display section.
10. CD PLAYER CONTROL
(for use with NAD CD Players).
;engages Pause
9engages Stop
2/; engages Play or toggles between Play and
Pause
∞ or § engages Track skip; press once to go to
the next track or to return to start of current or previ-
ous track.
Refer also to chapter “On Screen Display” and
“Setting Up the Surround Sound System” for more
information.
DISC Go to next disc (for NAD CD changers).
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11. CASSETTE DECK CONTROL
(For use with single (DECK B) or double transport
(A and B) NAD Cassette Decks).
press ENTER (No. 5) to access. The 3 and 4 button
are used to navigate and select an option (indicated
by highlighting the available option), the 1or 2button
to change a setting from the highlighted section and
ENTER to choose the desired option. Otherwise,
highlight EXIT and press ENTER to leave.
1or 2engages Forward Play or Reverse Play.
0/; Record / Pause. Press to put cassette deck
into record-pause. Press Play to start recording.
9Stops Play or Recording.
5engages Rewind.
The OSD menu are at maximum two “layers” deep;
this means that from the main menu (layer 1) you can
select a sub menu (layer 2).
6engages Fast Forward.
The other sub menus available are:
NOTES:
Direct sunlight or very bright ambient lighting may
affect the operating range and angle for the remote
control handset.
1 INPUT SETTINGS
•
Highlight INPUT SETTINGS in the SETUP menu
and press ENTER on the remote. You will see a
screen similar to the following (Fig. 8):
The infrared remote control command receiver,
located on the far left of the display window, receives
commands from the remote control. There must be a
clear line-of-sight path from the remote control to this
window; if that path is obstructed, the remote control
may not work.
INPUT SETTINGS
AUDIO = TUNER
VIDEO = VIDEO 1
MODE = DOLBY DIGITAL
DYNAMIC RANGE = 100%
ON SCREEN DISPLAY (OSD)
The NAD T 751 is equipped with an elaborate On
Screen Display facility (OSD). As the OSD is an
essential tool to set up the various parameters for
Surround sound correctly it is recommended that you
connect your monitor or television to the T 751.
DO NOT SAVE & EXIT
SAVE & EXIT
• The available choices in each of the fields can be
selected with the 1 or 2 button on the remote; con-
firm the choice with ENTER button.
Depending on your source and/or the television
system used you must first select the correct video
system. If the OSD rolls over the screen you must
select another system: PAL or NTSC.
AUDIO = identifies the selected audio input
(TUNER, CD, TAPE MONITOR and EXT. 5.1).
• While pressing the MEMORY button (No. 5) on
the front panel, press the VIDEO 1 input selector but-
ton (in section No. 11) repeatedly until the desired
system is shown in the display area.
VIDEO = identifies the selected video input (VIDEO
1, VIDEO 2, VIDEO 3, VIDEO 4 and VIDEO 5).
MODE = indicates the operating mode of the
selected input (DOLBY DIGITAL, DTS, PRO LOGIC,
EARS, STEREO).
The OSD can be engaged by pressing one of the
four cursor buttons on the remote control. The
SETUP Menu will appear as below (Fig. 7):
DYNAMIC RANGE = indicates the dynamic range
currently selected (100%, 75%, 50% and 25%) in
Dolby Digital mode only, or N/A for the other modes.
SETUP
•
Highlight SAVE & EXIT and press ENTER to
1
2
3
4
5
INPUT SETTINGS
CHANNEL BALANCE
CHANNEL DELAYS
SPEAKERS SETTINGS
EXIT
save the altered settings and return to the SETUP
menu. Otherwise, select DO NOT SAVE & EXIT to
leave without saving any changes.
2 CHANNEL BALANCE
• Highlight CHANNEL BALANCE in the SETUP
menu and press ENTER on the remote. You will see
a screen similar to the following (Fig. 9):
Use the cursor buttons on the remote control to
navigate, select the desired menu and options, then
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delay time can be adjusted as following options:
CHANNEL BALANCE
REAR
15, 16, 17, ...... 28, 29, 30ms
(1ms per step)
LEFT
:
:
:
:
:
:
0dB
0dB
0dB
0dB
0dB
0dB
CENTER
RIGHT
REAR L
REAR R
SUB
For other modes, the channel delay time cannot be
adjusted.
• Highlight SAVE & EXIT and press ENTER to save
the settings and return to the SETUP menu.
Otherwise, select DO NOT SAVE & EXIT to leave
without saving any changes.
DO NOT SAVE & EXIT
SAVE & EXIT
4 SPEAKER SETTINGS
• The T 751 allows the volume of each speaker to
be individually trimmed so that none of the speakers
dominates in playback and detracts from the sur-
round illusion.
• Highlight SPEAKER SETTINGS in the SETUP
menu and press ENTER on the remote.You will see a
screen similar to the following (Fig. 11):
• Highlight the required speaker and adjust with 1
cursor to decrease and 2cursor to increase the level,
Each speaker can be adjusted within a -10 to +10dB
range.
SPEAKER SETTINGS
PRESET
: 1
• Highlight SAVE & EXIT and press ENTER to save
the settings and return to the SETUP menu.
MAIN
: LARGE
: LARGE
: LARGE
: ON
CENTER
SURROUND
SUBWOOFER
NOTES:
The CHANNEL BALANCE menu in OSD can also
be accessed directly with the CHANNEL and TEST
buttons (respectively No. 7 and 6) on the remote for
setting adjustment. (Refer also to chapter “Remote
Control”).
DO NOT SAVE & EXIT
SAVE & EXIT
• The size and number of speakers can be
described in the SPEAKER SETTINGS menu. Press
1 or 2 cursor button to select the preset (PRESET 1,
2 or 3) that best applies.
3 CHANNEL DELAYS
• Highlight CHANNEL DELAYS in the SETUP
menu and press ENTER on the remote. You will see
a screen similar to the following (Fig. 10):
• The description LARGE and SMALL mean the fol-
lowing:
The LARGE mode is used when the speaker is full
range and capable of reproducing the entire audible
frequency spectrum 20Hz to 20kHz.
CHANNEL DELAYS
CENTER
REAR
OmS
OmS
The SMALL mode is used when the speaker is not
capable of reproducing the deepest bass portion of
the audio frequency 20Hz to 100Hz.
• The choices ON and OFF mean the following:
DO NOT SAVE & EXIT
SAVE & EXIT
The ON mode is used when the speaker is active
and receives the audio information intended.
The OFF mode is used when the speaker is inac-
tive. Audio signals intended for speakers set to the
OFF position are redirected to the main speakers.
• Use the 1or 2cursor button to change the center
channel delay time.
• T 751 is pre-programmed with 3 factory presets
that are suitable for most typical installations:
In Dolby Digital mode, T 751 allows the following
setting options:
CENTER
REAR
0, 1, 2, 3, 4 & 5ms
0, 1, 2, 3, ...... 13, 14, 15ms
(1ms per step)
Preset 1:
Main - LARGE; Center - LARGE; Surround -
LARGE; Subwoofer - ON
In this mode, all speaker channels are large, i.e. full
range, and the home theater system has a sub-
In Dolby Pro logic mode, only the rear channel
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woofer. This preset is particularly useful for large
rooms.
range and capable of reproducing the entire audible
frequency spectrum 20Hz to 20kHz. The SMALL
mode is used when the speaker is not capable of
reproducing the deepest bass portion of the audio fre-
quency 20Hz to 100Hz.
Preset 2:
Main - LARGE; Center - SMALL; Surround -
SMALL; Subwoofer - OFF
The ON mode is used when the speaker is active
and receives the audio information intended. The
OFF mode is used when the speaker is inactive.
Audio signals intended for speakers set to the OFF
position are redirected to the main speakers.
This preset is necessary for a home theater system
that does not have a subwoofer. The bass frequen-
cies from the center and surround channels are redi-
rected to the main speakers.
Preset 3:
T 751 comes with 3 factory presets for typical
Home Theater systems and ease installation. Refer
also to chapter “On Screen Display” section 4 for
more information.
Main - SMALL; Center - SMALL; Surround -
SMALL; Subwoofer - ON
This preset is ideal for those systems using 5 small
speakers combined with a subwoofer. The bass fre-
quencies from each of these 5 channels are redirect-
ed to the subwoofer.
Using a separate center channel speaker will allow
the dialogue to cut through even the biggest sound
effects and musical scores. Having the sound spread
across three front speakers also stabilizes the stereo
image, making the usable listening area much bigger.
NOTES:
Regardless of the available main speakers, select
Preset 2 when subwoofer is not available to redirect
bass frequencies to the main speakers.
For best results, you should consider using a cen-
ter speaker. Ideally it should be the same type as the
left and right speakers.
SETTING UP THE SURROUND SYSTEM.
• Choose SURROUND and select one of the three
modes available: Small, Large, Off.
To obtain the best results in any of the Surround
Modes it is important that the T 751 is carefully set
up. Performing the complete setup is done using the
On Screen Display menus. It is therefore recom-
mended you connect your Television or monitor to
the T 751 monitor output.
Installing surround speakers will greatly enhance
the surround experience as these add considerably to
the overall “ambience”.
Refer to the chapter “On Screen Display (OSD)” on
how to access the SETUP Menu of the On Screen
Display, choose sub-menus and change settings.
Dolby Pro Logic encoded material is deliberately
limited in dynamic range and frequency bandwidth for
the surround channel and thus only requires speak-
ers of far lesser specification compared to the front
channels. Dolby Digital however is a full range sys-
tem, with two independent surround channels and
with dynamics equal to that of the front channels. For
this reason it is advisable to choose loudspeakers
which are similar in power handling and performance
capability to those of the front channels.
The setup procedure is broken down in three sec-
tions:
1. Speaker Settings
2. Channel Balance
3. Channel Delays
Speaker Settings:
For best results, the Surround loudspeakers should
not beam the sound directly at the listener. One way
of achieving this is to use ‘dipole’ Surround speakers
which aim the sound down the walls rather than
directly into the room.
First you need to indicate which speakers are con-
nected to your T 751. Besides the Main speakers
(Left & Right), these can include a Center, two
Surround Speakers and a Subwoofer.
• Call up the SETUP menu of the On Screen
Display (Fig. 7)
Many film soundtracks rely heavily on very low fre-
quency sound effects which are difficult for normal or
smaller hi-fi speakers to reproduce. To faithfully
reproduce these low frequencies you can use a spe-
cially designed low frequency loudspeaker with its
own built-in amplifier (“active subwoofer”). Because it
is difficult to hear which direction very low frequencies
are coming from, you only normally need one sub-
woofer and this can be placed virtually anywhere in
the room. The Subwoofer output of the T 751 is
designed specifically to drive a subwoofer system.
• Select the SPEAKER SETTINGS (Fig. 11)
• Highlight PRESET and use 1 or 2 cursor button
to select the preset (PRESET 1, 2 or 3) that best
applies to current setting or change the speaker fields
individually as desired.
Four modes available appropriate to the T 751’s
setup: LARGE or SMALL and ON or OFF.
The LARGE mode is used when the speaker is full
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Dolby Digital uses a dedicated Low Frequency
Effects (LFE) channel. If a subwoofer has been
selected, the LFE channel will be fed to the sub-
woofer output.
channel speakers that are up to 5 feet (1.5 m) closer
to the listening position than the front left and right
speakers.
NOTES:
Channel Delays:
In rare system setups, the center channel speaker
is actually further away than the front left and right
speakers. In these cases, set the center channel
delay to 0mS. The center channel delay time adjust-
ment is only available in Dolby Digital surround mode.
For the best surround sound performance it is
important that sound from all speakers reach the lis-
tener’s ears at the same time. Because the sur-
round/rear speakers are usually closer to the listener
than the front speakers, there is tendency for the ear
to localise sounds to the rear, because the ear takes
most notice of the sounds that arrive at the head first.
Similarly, the center speaker is often closer to the lis-
tener than the front left and right speakers. To com-
pensate for this, the T 751 can slightly delay the
audio sent to the center and rear (closer) speakers. In
this way, when playing Dolby Digital or Dolby Pro
logic soundtracks, the sound from all speakers
arrives uniformly at the listening position as intended
by the film’s producer.
To set the rear channel delay time,
• Use the 3 or 4 cursor button (No. 7) to highlight
the REAR.
• Scroll the preset delay time options by 1 and 2
cursor buttons.
Measure the distance from the listening position to
either the left or right rear speaker (dLS or dRS).
Subtract the rear speaker distance from the front
speaker distance (dFL or dFR). The resulting dis-
tance is equivalent to the delay in milliseconds for the
rear delay setting. For example, if your rear speaker
distance is 6 feet (1.8 m) and the front distance is 12
feet (3.7 m), the correct rear channel delay setting is
6 milliseconds. Again, set the rear channel delay to
0mS if the rear channels are further from the listening
position than the front speakers.
Each millisecond corresponds approximately with 1
foot or 30.5 centimeters.
NOTE:
The channel delay option is not available in DTS
surround mode.
To set the center channel delay time,
• Call up the SETUP menu of the On Screen
Display (Fig. 7).
In Dolby Digital surround mode, the rear channel
delay time can be set from 0ms to 15ms with 1ms
increments.
• Select the CHANNEL DELAYS menu (Fig. 10).
• Choose CENTER and select the desired delay
time (1, 2, 3, 4 or 5ms).
In Dolby Pro logic surround mode, the rear channel
delay time can be set from 15ms to 30ms and 1ms
per step. In DTS surround mode, the channel delay
time cannot be adjusted.
FRONT
LEFT
FRONT
RIGHT
CENTER
dC
• When both delays have been entered, choose
“SAVE & EXIT” to save the settings and return to the
Main Menu.
dFL
dFS
dFR
dRS
LISTENING
POSITION
Channel Balance:
REAR
LEFT
REAR
RIGHT
The output levels of each of the speakers connect-
ed to the T 751 may need to be adjusted so that there
is an even balance of sound from all the speakers in
the system. If, for instance, the relative volume level
to the Left and Right speakers and the center speak-
er is set too low, most of dialogue may be difficult to
follow. If, on the other hand it is set too loud, the over-
all balance will sound unnatural.
Measure the distance from the listening position to
the center speaker (dC) and to one of the front
speakers (dFL or dFR). Subtract the center channel
distance from the front L or R channel distance. For
example, if the front speakers are 12 feet (3.7 m)
from the listening position and the center speaker is
10 feet (3.0 m), the difference is 2 feet (0.6 m). For
this example the center channel delay is set to 2 mil-
liseconds or ms.
To adjust the channel balance the T 751 is
equipped with a TEST button (No. 6) to help assess
the loudness levels of each speaker. Before adjusting
the channel balance level make sure the master vol-
ume is turned down to a normal listening level.
The T 751 can delay the center channel output up
to 5 milliseconds and thus compensates for center
Pressing the TEST button engages the Test signal
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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.
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:
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.
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 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.
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.
Press the TEST button again to leave or cancel the
Test mode, any changes will be memorized automati-
cally.
Before making any connections to any 12V trigger
input or output, make sure all components are dis-
connected from the AC mains.
The loudspeaker levels can also be individually
adjusted with the OSD setup menu:
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.
• 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.
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TROUBLESHOOTING
PROBLEM
CAUSE
SOLUTION
NO SOUND
• Power AC lead unplugged or
power not switched on
• Tape Monitor selected
• Mute on
• Check if AC lead is plugged in
and power switched on
• De-select Tape Monitor mode
• Switch off Mute
NO SOUND ON ONE CHANNEL
• Speaker not properly connected
or damaged.
• Check connections and
speakers
• Input lead disconnected or
damaged
• In Setup “OFF” for surround
speaker selected
• Check leads and connections
• Select appropriate Surround
mode (large or small)
NO SOUND ON SURROUND
CHANNELS
• No surround mode selected
• Mono sound source
• Select a Surround Mode
• Test system with Stereo or
Dolby Surround material
• Check speakers and
connections
• Speakers not properly connected
• Surround volume level too low
• Increase surround volume
level
NO SOUND ON CENTER
CHANNEL
• In Setup “OFF” for center speaker
selected
• Select appropriate Center
mode (large or small)
• Speaker not connected properly
• Center volume level set too low
• Check speaker and connection
• Increase center volume level
“DOLBY DIGITAL” OR “DTS”
AUTO-DETECTION FUNCTION
DOES NOT WORK
• Source not connected using
digital inputs
• Connect digital output of
source to T 751
WEAK BASS/ DIFFUSE
STEREO IMAGE
• Speakers wired out of phase
• Check connections to all
speakers in the system
REMOTE CONTROL HANDSET
NOT WORKING
• Batteries flat, or incorrectly
inserted
• IR transmitter or receiver
windows obstructed
• Check or replace batteries
• Remove obstruction
• IR receiver in direct sun or very
bright ambient light
• Place unit away from direct
sun, reduce amount of
ambient light
• Antenna leads incorrectly
connected
• Check antenna connections to
receiver
NO SOUND WITH TUNER
• Station not selected or weak
signal with FM Mute on.
• Re-tune or switch off FM Mute
NOISE, HISS ON AM AND FM
DISTORTION ON FM
• Weak signal
• Check station tuning. Adjust
or replace antenna.
• Multi-path signals or interference
from another station
• Check station tuning. Adjust
or replace antenna
WHISTLES OR BUZZES ON
FM & AM
• Interference from other electrical
sources - computers, games
consoles
• Check station tuning. Switch
off or move the source of the
electrical noise
• Interference from fluorescent
lighting or electrical motors
• Check station tuning. Adjust
or replace AM antenna
WHISTLES OR BUZZES ON
AM
NO RDS NAME (PS)
• Station signal too weak.
• Check station tuning. Adjust
or replace antenna
• No remedy
• Station not transmitting RDS data
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NAD ELECTRONICS
(NEW ACOUSTIC DIMENSION)
LONDON
© 2000. T 751 I.M. PRINTED IN THE PEOPLE’S REPUBLIC OF CHINA.
P/N: 4301-4108-0
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