®
C720BEE
Stereo Receiver
Owner’s Manual
Manuel d’Installation
Bedienungsanleitung
Gebruikershandleiding
Manual del Usuario
Manuale delle Istruzioni
Manual do Proprietário
Bruksanvisning
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INPORTANT SAFETY INSTRUCTIONS
19 Damage Requiring Service - Unplug this product from the wall outlet and refer servicing to qualified service
personnel under the following conditions:
a) When the power-supply cord or plug is damaged.
b) If liquid has been spilled, or objects have fallen into the product.
c) If the product has been exposed to rain or water.
d) If the product does not operate normally by following the operating instructions. Adjust only those controls that
are covered by the operating instructions as an improper adjustment of other controls may result in damage
and will often require extensive work by a qualified technician to restore the product to its normal operation.
e) If the product has been dropped or damaged in any way.
f) when the product exhibits a distinct change in performance-this indicates a need for service.
20 Replacement Parts - When replacement parts are required, be sure the service technician has used replacement
parts specified by the manufacturer or have the same characteristics as the original part. Unauthorized substitutions
may result in fire, electric shock, or other hazards.
21 Safety Check - Upon completion of any service or repairs to this product, ask the service technician to perform
safety checks to determine that the product is in proper operating condition.
22 Wall or Ceiling Mounting - The product should be mounted to a wall or ceiling only as recommended by the
manufacturer.
WARNING
TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN EQUILATERAL TRIANGLE, IS
INTENDED TO ALERT THE USER TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE”
WITHIN THE PRODUCT’S ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A
RISK OF ELECTRIC SHOCK TO PERSONS.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE USER TO
THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE
LITERATURE ACCOMPANYING THE APPLIANCE
CAUTION
Changes or modifications to this equipment not expressly approved by NAD Electronics for compliance could void the
user’s authority to operate this equipment.
CAUTION REGARDING PLACEMENT
To maintain proper ventilation, be sure to leave a space around the unit (from the largest outer dimensions including
projections) equal to, or greater than, shown below.
Left and Right Panels : 10 cm
Rear Panel : 10 cm
Top Panel : 50 cm
IMPORTANT INFORMATION FOR UK CUSTOMERS
DO NOT cut off the mains plug from this equipment. If the plug fitted is not suitable for the power points in your
home or the cable is too short to reach a power point, then obtain an appropriate safety approved extension lead or
consult your dealer. If, nonetheless, the mains plug is cut off, REMOVE THE FUSE and dispose of the PLUG immediately,
to avoid possible shock hazard by inadvertent connection to the mains supply. If this product is not provided with a
mains plug, or one has to be fitted, then follow the instructions given below:
IMPORTANT
DO NOT make any connection to the larger terminal which is marked with the letter ‘E’ or by the safety
earth symbol or coloured GREEN or GREEN AND YELLOW.
The wires in the mains lead on this product are coloured in accordance with the following code:
BLUE - NEUTRAL
BROWN - LIVE
As these colours may not correspond with the coloured markings identifiying the terminals in your plug, proceed as
follows:
The BLUE wire must be connected to the terminal marked with the letter ‘N’ or coloured BLACK.
The BROWN wire must be connected to the terminal marked with the letter ‘L’ or coloured RED
When replacing the fuse, only a correctly rated and approved type should be used, and be sure
to re-fit the fuse cover.
IF IN DOUBT CONSULT A COMPETENT ELECTRICIAN
This product is manufactured to comply with the radio interference requirements of EEC DIRECTIVE 89/68/EEC and
73/23/EEC
Model No. :________________________Serial No. :_________________
3
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ABOUT THE C 720BEE
REAR PANEL CONTROLS
FONT PANOTOLSFONT PANOTOLS
1
2
3
4
5
SPEAKERS
A
ANTENNA
NORTH AMERICA
SWITCHED
Serial No./No. De Series
FM
GND
AM
120V 60Hz 100W/1
A
MAX.
S PEAKERS
B
EUROPE
&
ASIA
RECORD OU T
SWITCHED
IR IN
DISC
CD
VIDEO
AU X
TAPE
ZON
E
2
PR
E
O
UT MAI N IN
L
VACATION SWITCH
+12V
TRIGGER
OU T
L
SUBW
OUT
SOFT
CLIPPING
R
R
ON
OFF
230V 50Hz 100W/1
A
MAX.
IR OU T
17
16
14 13 12 11 10
9
8
7
18
15
6
FRONT PANEL CONTROLS
9
10
1
2
3
4
5
6
7 8
11
12
RECORD OUT/
VOLUME
Stereo Receiver
C
720BEE
ZONE
2
SELECTOR
DISPLAY MEMORY
PRESET
AUX
VIDEO
MEMORY
PRESET
BLEND
FM MUT
E
TUNED FM ST
RDS
MUTE
MIN
DELETE
FM MUT
MODE
TAPE
CD
E
TA PE MONI TO
R
BLEND
/
TUNE
TUNER
DISC
TO NE
BASS
DEFEAT
TREBLE
BALANCE
SPEAKERS
PHONES
A
B
FM
AM
TAPE
AUX
VIDEO
CD
DISC
17
18
16
15
14
13
4
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ABOUT THE C 720BEE
REMOTE CONTROLS
1
2
1
CD
VIDEO
IN
DISC
TAPE
4
1
TAPE
2
AUX
IN
5
IN
6
BAL
2
SOURCE
PRESET
LOCAL
TUNER
FM
TUNE
6
AM
ZR
3
3
8
4
5
7
6
7
D
E
V
1
D
E
V
2
9
PLACE BATTERIES INTO OPENING. ENSURE
THE CORRECT POLARITY IS OBSERVED
REPLACE BATTERY COVER BY ALIGNING AND
INSERTING THE TWO TABS INTO THE HOLES.
PRESS IN AND LIFT TAB TO REMOVE
BATTERY COVER OUT FROM RECESS
PRESS BATTERY COVER INTO PLACE UNTIL IT
'CLICKS' CLOSED
5
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ABOUT THE C 720BEE
NOTES ON INSTALLATION
NOTE:
An external AM antenna can improve long-distance reception
Your NAD C720BEE 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. Make sure the
unit is switched off before making any connections.
substantially; consult your NAD audio specialist or a professional
antenna installer. Do not connect anything other than a loop antenna
to the AM ANTENNA terminal. Do not remove the AM loop antenna.
3 SPEAKERS A & B - Speaker terminals for speakers with an impedance
of 4 ohms or more. Connect the right speaker to the terminals
marked '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 thicker) stranded wire to connect loudspeakers to
your NAD C720BEE. The high-current binding post terminals can be
used as a screw terminal for cables terminating in spade or pin
sockets or for cables with bare wire ends.
The RCA sockets on your NAD C720BEE are colour coded for
convenience. Red and white are Right and Left audio respectively.
Use high quality leads and sockets for optimum performance and
reliability. Ensure that leads and sockets are not damaged in any way and
all sockets are firmly pushed home.
For best performance, use quality speaker leads of 16 gauge (1.5mm)
thickness or more. If the unit is not going to be used for some time,
disconnect the plug from the AC socket.
BARE WIRES AND PIN CONNECTORS
Should water get into your NAD C720BEE, 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.
Bare wires and pin sockets should be inserted into the hole in the
shaft of the terminal. Unscrew the speaker terminal's plastic bushing
until the hole in the screw shaft is revealed. Insert the pin or bare
cable end into the hole and secure the cable by tightening down the
terminal's bushing. Ensure bare wire from the speaker cables does
not touch the back panel or another socket. Ensure that there is only
1/2" (1cm) of bare cable or pin and no loose strands of speakers wire.
DO NOT REMOVE THE COVER, THERE ARE NO USERSERVICEABLE
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.
POWERDRIVE
To meet the diverse requirements of high current drive and high
dynamic power, our patented PowerDrive amplifier circuit will build
further on our reputation for amazingly effective power. By adding a
second high-voltage rail to our well regulated high-current power
supply, we get an "overdrive" that can nearly double the continuous
power on a short term dynamic power basis. This is a further
development and refinement of our renowned Power Envelope
circuit, utilized by NAD in the 80's and 90's. PowerDrive differs from
Power Envelope in that it offers greater amplifier stability and low
impedance drive capability, resulting in less distortion when driving
real speakers with real program material.
QUICK START
1
Connect the speakers to the rear Speaker terminals and sources to
the relevant rear input sockets.
2
3
4
5
Plug in the AC power cord.
Press the VACATION button on the back of the C720BEE.
Press the POWER button to turn the NAD C720BEE on.
Press the required input selector.
REAR PANEL CONNECTIONS
ATTENTION!
4 SWITCHED AC OUTLET - The AC power cord of another component
may be plugged into this accessory outlet. Components plugged into
this outlet will be switched On and Off by the VACATION SWITCH on
the rear panel.
Please make all connections to your C720BEE receiver with the unit
powered off or unplugged. (It is also advisable to power-down or unplug
all associated components while making or breaking any signal or AC
power connections.)
NOTE:
1-2 FM & AM ANTENNA: The supplied wire "dipole" FM antenna will
connect to the FM connector using the supplied "balun" adapter. It
will usually work best when mounted on a vertical surface such as a
wall, with arms fully outstretched forming a horizontal "T"
perpendicular to the origin point of the signal. Experiment with
placement and orientation of to yield the clearest sound and lowest
background noise. In areas of difficult FM reception an external FM
antenna can yield dramatic gains in quality; consult your NAD audio
specialist or a professional antenna installer.
The total power consumption of any components connected to the
AC outlets may not exceed 100 Watts.
5 AC line cord - Plug the AC power cord into a live AC wall socket.
Make sure all connections have been made before connecting to
mains.
6. VACATION SWITCH ON/OFF The VACATION switch is the master
on/off control for the amplifier. When the switch is in the ON state
the amplifier is in standby as shown by the amber LED above the
power switch on the front panel. If the amplifier will not be used for
an extended period of time, switch the VACATION switch to the OFF
position.
The AM loop antenna supplied with the C720BEE (or a suitable
replacement) is required for AM reception. Open the clip terminal
levers insert the wire and close, ensuring that the lever locks the wire
in place. Testing different positions for the antenna may improve
reception; vertical orientation will usually produce the best results.
Antenna proximity to large metal objects (appliances; radiators) may
impair reception, as will attempts to lengthen the wire to the loop.
6
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ABOUT THE C 720BEE
7 SOFT CLIPPING™ - When an amplifier is driven beyond its specified
power output, 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 was not designed to reproduce. The NAD
Soft Clipping circuit gently limits the output of the system to minimize
audible distortion if the amplifier is overdriven. If your listening
involves moderate power levels you may leave the Soft Clipping
switch to Off. If you are likely to play at high levels, that could stretch
the amplifier's power capability, then switch Soft Clipping On
15 CD input - Input for a CD 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. The NAD C720BEE only accepts analogue
signals from your CD player.
16 DISC input - Input for additional line level input signals such as CD,
Mini Disc player or the output signal from a step-up amplifier (such
as the NAD PP2) for a turntable. Use a twin RCA-to-RCA lead to
connect the auxiliary unit's left and right 'Audio Outputs' to this
input.
8 SUBW OUT Connect the SUBW OUT output to a powered ("active")
subwoofer (or to power amplifier channel driving a passive system).
The subwoofer output roll-off frequency is 100 Hz at -3dB.
17 IR Input / Output - This input is connected to the output of an IR
(infrared) repeater (Xantech or similar), or the IR output of another
component to allow control of the C720BEE from a remote location.
Ask your dealer or custom installer for further details.
9 MAIN IN - Use these connections to an external pre-amplifier or
processor, such as a surround-sound decoder. In normal use these
18 +12V TRIGGER OUT - The 12V TRIGGER OUTPUT is used for
controlling external equipment that is equipped with a 12V trigger
input. This output will be 12V when the C720BEE is on and 0V when
the unit is either off or in standby. This output can drive a load up to
50mA at 12V.
should be connected to the Pre-Out sockets with the links supplied.
To connect your NAD C720BEE to external processor or pre-amplifier
first remove these links. Use a twin RCA-to-RCA lead to connect to
the left and right 'Audio Output' of the pre-amp or processor to the
Main-In sockets.
The plug required is a standard 3.5mm Mini-Jack plug ("mono"): The
tip is the live or + connection, the shaft of the input jack is the 12V-
trigger - or ground connection.
NOTE:
Always turn the amplifier off before connecting or disconnecting
anything from to Pre-Out and Main-In sockets.
NOTES:
10 PRE-OUT - Connections to an external power amplifier or processor,
such as a surround-sound decoder. In normal use these should be
connected to the Main-In sockets (No. 10) with the links supplied. To
connect your NAD C720BEE to external processor or amplifier
sections first remove these links. Use a twin RCA-to-RCA lead to
connect to the left and right 'Audio Input' of the Power amp or
processor to the Pre Out sockets.
Check the specifications of the Trigger input terminal on the other
components to ensure these are compatible with the C 720BEE's
12Vtrigger output. NAD components equipped with 12V input
triggers are fully compatible with the C720BEE's 12V output trigger.
Before making any connections to any 12V trigger input or output,
make sure all components are disconnected from the AC mains.
Failure to observe the above may result in damage to the C720BEE 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.
NOTE
The Pre-Out output signal will be affected by the NAD C720BEE's
volume and tone control settings, always turn the amplifier off before
connecting or disconnecting anything from to Pre-Out and Main-In
sockets.
11 RECORD OUT/ZONE 2 - Connect the left and right 'Audio Input' of
the tape machine to the TAPE OUT sockets for recording. For use as
a zone 2 source, connect the left and right "Audio Input" of an
integrated amplifier line in sockets to these line level outputs.
12 TAPE IN - Connections for analogue playback of an audio tape
recorder of any type. Using twin RCA-to-RCA leads, connect to the
left and right 'Audio Output' of the tape machine to the TAPE 1 IN
sockets for playback.
13 AUX input - Input for additional line level input signals such as
another CD player. Use a twin RCA-to-RCA lead to connect the
auxiliary unit's left and right 'Audio Outputs' to this input.
14 VIDEO input - Input for the audio signal from a stereo VCR (or stereo
TV/Satellite/Cable receiver) or other line-level audio source. Using
twin RCA-to-RCA leads, connect to the left and right 'Audio Outputs'
of the unit to these inputs. NOTE: These are audio inputs only.
7
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ABOUT THE C 720BEE
FRONT PANEL CONTROLS
9 Infra-red remote control command receiver - The infrared sensor,
located beside the VFD, 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.
1 Power - Press the POWER button to switch the unit from Stand-by to
the operating mode; The Stand-by indicator (Fig. 2; No. 2) will turn
from amber, to red, then to green. Press the POWER button to switch
the unit to the Stand-by mode: The Stand-by indicator will light up
amber. Upon selecting any input at the front panel or the ON button
of the remote, the C720BEE will choose the last selected as the active
input.
NOTE:
Direct sunlight or very bright ambient lighting may affect the
operating range and angle for the remote control handset.
NOTE:
10 DISPLAY PANEL - The Display Panel shows information about the
C720BEE's operating modes and information about the station
currently selected, Audio Mute, Blend, FM Mute, Stereo, Centre Tune,
etc. are all indicated in this window. The display also has an eight
character alphanumeric section, which will display the active input,
station name, Radio Text or frequency.
The remote control handset supplied with the C720BEE is of a
universal NAD type, designed to operate several NAD models. Some
buttons on this handset are inoperative, as the functions aren't
supported by the C720BEE.
2 Power/Standby/Protection LED - Upon switching the power on, the
LED will light up red for a few seconds before the protection circuit is
deactivated. In cases of serious abuse of the amplifier, such as
overheating, excessively low loudspeaker impedance, short circuit
etc. the amplifier will engage its Protection circuitry, indicated by the
LED turning from green to red, and the sound being muted. In such
a case, turn the amplifier off, wait for it to cool down and/or check
the speaker connections, making sure the overall loudspeaker
impedance doesn't go below 4 ohms. Once the cause for the
protection circuitry to engage has been removed, press Power again
to resume normal operation.
11 RECORD OUT/ZONE 2 SELECTOR - This selector switch doubles as
both a record source selector and a second zone source. Control is
also achieved by use of the ZR-3 zone remote control.
12 VOLUME - The VOLUME control adjusts the overall loudness of the
signals being fed to the loudspeakers. It is motor driven and can be
adjusted from the remote control handset. The VOLUME control does
not affect recordings made using the Tape outputs but will affect the
signal going to the Pre-amp output (Pre Out).
On the remote control handset, press the MUTE button to
temporarily switch off the sound to the speakers and headphones.
3 BLEND The Blend button toggles between engaging or disengaging
the Blend feature; when engaged, "BLEND" lights up in the VFD.
Mute mode is indicated by the MUTE icon in the VFD. Press the MUTE
button again to restore sound. Mute does not affect recordings made
using the Tape output but will affect the signal going to the Pre-amp
output (Pre Out).
4 DISPLAY When the AM/FM tuner is the selected input, sequentially
pressing DISPLAY shows the currently tuned station's RDS data,
toggling between the current station's Radio Text and Station Name
displays
13 BALANCE - The BALANCE control adjusts the relative levels of the left
and right speakers. The 12 o'clock position provides equal level to the
left and right channels. A detent indicates this position. Rotating the
control clockwise moves the balance towards the right. Rotating the
control anti-clockwise moves the balance to the left. The BALANCE
control does not affect recordings made using the Tape output but
will affect the signal going to the Pre-amp output (Pre Out).
5 MEMORY Use to store tuned stations to the C720BEE's 40 preset-
memory locations.
6 FM MUTE/MODE - In the normal Mute position, only the stations with
a strong signal can be listened to, and the noise between stations is
muted. Pressing the [FM Mute/Mode] button allows distant (and
potentially noisy) stations to be received.
14 TONE DEFEAT - The TONE DEFEAT switch by-passes the tone control
section of the NAD C720BEE. If the Tone Controls are not normally
used and left in the 12 o'clock position, then it is advisable to switch
out the Tone Control section altogether by using this switch. In the
'out' position, the Tone Control circuits are active; pushing the TONE
DEFEAT switch 'in' bypasses the Tone Control section.
7 PRESET - Press either PRESET buttons to step up or down between
radio presets; 30 FM and 10 AM station presets are available. NOTE
that this function "wraps": Pressing the PRESET buttons will step
from Preset 30 to Preset 1, or vice versa. "Unused" presets are
skipped over. (NOTE that Presets must previously have been stored)
8 TUNE - Press either TUNE button momentarily to step up or down
between FM or AM frequencies. Press and hold TUNE buttons for
more than 2 seconds to search up or down; the C720BEE's tuner will
stop at the next sufficiently strong signal it encounters. NOTE that this
function, too, "wraps," and will continue searching up or down from
one end of the AM or FM band to the other.
15 Tone controls - The NAD C720BEE is fitted with BASS and TREBLE
tone controls to adjust the tonal balance of your system. The 12
o'clock position is 'flat' with no boost or cut, and an indent indicates
this position. 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. The Tone controls do not affect recordings
made using the Tape outputs but will affect the signal going to the
Pre-amp output (Pre Out).
NOTE that: TUNE button increments the FM band by 0.05 MHz steps
(twice the precision of most tuners). On the AM band, TUNE
increments the AM band by 10 kHz or 9 kHz steps. To change the
step amount, select AM and then hold in the FM MUTE/MODE and
AM keys simultaneously.
8
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ABOUT THE C 720BEE
REMOTE CONTROL HANDSET
16 Input selectors - These buttons select the active input to the
C720BEE and the signal sent to the loudspeakers, the Tape output
and the PRE OUT sockets. The buttons on the remote control handset
duplicate these buttons, with the exception of the Video 1 input.
The Remote Control handset handles all the key functions of the NAD
C720BEE and has additional controls to remotely operate NAD Cassette
and CD machines. It will operate up to a distance of 16ft (5m). Alkaline
batteries are recommended for maximum operating life. Two AAA (R
03) batteries should be fitted in the battery compartment at the back 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.
DISC Selects a line-level source connected to the DISC sockets as the
active input.
CD Selects the CD (or other line-level source) connected to the CD
sockets as the active input.
VIDEO Selects the VCR (or stereo TV/Satellite/Cable receiver)
connected to the VIDEO sockets as the active input.
AUX Selects a line-level source connected to the AUX sockets as the
active input.
Please refer to previous sections of the manual for a full description of
individual functions.
When a command from the remote control is received, the
Standby/protection indicator will blink.
FM Selects the FM tuner.
AM Selects the AM tuner.
1 POWER ON & OFF - The NAD C720BEE remote has a separate On and
Off button. This can be particularly useful to keep components within
a system "insync": This way all components will switch to stand-by
when Off is pressed or switch to operating mode when On is pressed,
instead of some components switching On when the amplifier is
switched to Stand-by. (Note that the other components have to be
capable of responding to the separate On and Off commands as
well). Press the ON button to switch the unit from Stand-by to the
operating mode; The Stand-by indicator (Fig. 2; No. 2) will turn from
amber, to red, then to green. Press the OFF button to switch the unit
to the Stand-by mode: The Stand-by indicator will light up amber.
NOTE:
The SR-5 remote control handset has one TUNER button; toggle for
selecting between AM and FM.
NOTE:
The ZR-3 remote control has separate buttons for AM and FM;
pressing either one will select the C720BEE's tuner input.
TAPE Selects the output from a tape recorder when playing back
tapes or monitoring recordings made through the Tape socket.
NOTE:
2 INPUTS - The input selector buttons perform the same functions as the
When TAPE is selected, TAPE MONITOR will light up in the VFD
NOTE:
buttons labelled the same on the front panel.
The RECORD OUT / ZONE 2 SELECTOR will not allow access to TAPE
when TAPE is selected.
3 Numeric Keys - The numeric keys allow for direct input of tracks for
CD-players, and direct channel/preset access for the tuner.
17 SPEAKER A & B - The Speakers A and B buttons engage or
disengage the speakers connected respectively to the Speakers A and
Speakers B terminals on the rear panel. Press A to switch the speakers
connected to the speaker A terminals On or Off. Press B to switch the
speakers connected to the speaker A terminals On or Off. The
indicator directly over the buttons shows the status of both speakers
A and B.
4 MASTER VOLUME - Press the MASTER VOLUME
or
buttons to respectively increase or decrease the loudness level.
Release the button when the desired level is reached. The motorised
Volume Control on the front panel will indicate the level set. The
Master Volume buttons do not affect recordings made using the Tape
outputs but will affect the signal going to the Pre-amp outputs.
5 MUTE - Press the MUTE Button to temporarily switch off the sound to
the speakers and headphones. Mute mode is indicated by the MUTE
icon in the VFD. Press MUTE again to restore sound. Mute does not
affect recordings made using the Tape output but will affect the
signal going to the Preamp outputs.
If Speakers A and B are both engaged (both indicators over the
Speakers A and B buttons are lit), the amplifier's output power is fed
to both sets of speakers in parallel. If speakers A and B are
disengaged, both sets of speakers are silenced. You can use this
setting mode to listen to headphones.
6 TUNER CONTROL - TUNE
or
scans respectively higher or
18 PHONES Socket - A 1/4" stereo jack socket is supplied for
headphone listening and will work with conventional headphones of
any impedance. The volume, tone and balance controls are operative
for headphone listening. Use a suitable adapter to connect
headphones with other types of sockets, such as 3.5mm stereo
'personal stereo' jack plugs.
lower station frequencies for both AM and FM.
PRESET
or
selects respectively higher or lower number
station preset.
NOTE:
Make certain that the volume control is turned to minimum (fully
anti-clockwise) before connecting or disconnecting headphones.
Listening at high levels can damage your hearing.
9
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ABOUT THE C 720BEE
LISTENING TO RADIO
7 CD PLAYER CONTROL - (for use with NAD CD-Player)
| | engages Pause
The C720BEE's internal AM/FM tuner offers very high quality sound from
radio broadcasts. Note that reception and sound quality will always be
dependent to a degree on the type of antenna(s) used, as well as
proximity to the broadcast origin, geography, and weather conditions.
engages Stop
engages Play or toggles between Play and Pause or engages
Track skip; Press once to respectively go to the next track or to return
to start of current or previous track.
engages reverse Scan and Skip
ABOUT ANTENNAS
engages forward Scan and Skip.
engages CD drawer Open/Close; Press once to open the CD
drawer then once again to close the CD drawer and start playback.
The supplied ribbon-wire FM antenna can be connected to the rear-panel
FM-antenna input using the 'balun' adapter included, and should be fully
extended to form a "T". This folded-dipole antenna will usually work
best oriented vertically, with the arms of its "T" full outstretched and
arranged perpendicular to the origin of the desired broadcast. There are
no 'rules,' however, and experimenting freely with antenna placement
and orientation may yield the clearest sound and lowest background
noise. In areas of poor FM reception, an exterior FM antenna can improve
performance dramatically. If radio listening is important to you, consider
consulting an antenna installation professional to optimize your system.
7 CASSETTE DECK CONTROL - (for use with single NAD Cassette
Decks)
engages Forward Play.
Press to put cassette deck into record-pause, then press Play to
start recording.
Stops Play or Recording.
engages Rewind.
engages Fast Forward.
The supplied AM 'loop' antenna will usually provide adequate reception.
However, an exterior AM antenna can be used to improve reception;
consult an antenna professional for more information.
8 TAPE/TUNER-CD - The TAPE/TUNER - CD switch applies tape controls
to the transport keys when in the TAPE/TUNER position, and applies
CD controls to the transport keys when in the CD position.
SELECTING THE RADIO
Press the AM or FM key on the C720BEE front panel, the SR-5's [TUNER]
key to select the receiver's radio mode. Each subsequent press of [TUNER]
key will toggle the unit between its FM and AM bands.
9 DEV 1/DEV 2 - In some instances when one's audio system is without
a tape deck, the CD transport keys may be set to operate in either
position of the Tape/Tuner -CD switch (No.8).
The default setting for this remote control switch set to DEV 1. In this
position, the Tape/Tuner -CD switch allows for both tape and CD
control (No.7). If one sets this switch to DEV 2, then the transport
keys will remain as CD control keys irregardless of the position of the
Tap/Tuner -CD switch.
TUNING STATIONS
Press TUNE on the front panel momentarily to step up or down between
FM or AM frequencies. Press and hold TUNE for more than 2 seconds to
search up or down; the C720BEE's tuner will stop at the next sufficiently
strong signal it encounters. Pressing the either TUNE key momentarily
during the search process will stop the search. From the SR-5 press
[TUNE]; hold in to automatically search, press momentarily to perform
slow manual search.
NOTES: The remote control handset supplied with the C720BEE is of a
universal NAD type, designed to operate several NAD models. Some
buttons on this handset are inoperative as the functions aren't
supported by the C720BEE. The Video 2 and Video 3 input selector
buttons (inside section No.2) on the remote control handset are
inoperative in the case of the C720BEE.
SR-5 DIRECT FREQUENCY ENTRY
With the SR-5 you can now directly enter the frequency of the radio
station. When entering digits, more than two will force the direct entry
mode. Pressing ENTER will lock the frequency as seen on the C720BEE's
VFD. For example; pressing 1021 will force the direct entry to 102.1.
Direct sunlight or very bright ambient lighting may affect the
operating range and angle for the remote control handset.
SETTING RADIO PRESETS
The C720BEE can store as many as 40 of your favorite radio stations for
immediate recall; 30 FM stations and 10 AM. To store a radio preset, first
tune the desired frequency (see above), then press the front panel
MEMORY key. Press either PRESET key to select the preset number to be
assigned. Then press the MEMORY key once again.
NOTE: The Radio Presets must be stored from the front panel; this setup
function is not accessible from the SR-5 remote.
10
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ABOUT THE C 720BEE
SELECTING RADIO PRESETS
ABOUT RDS
Press either PRESET key on the front panel to step up or down between
presets; press and hold either PRESET key to "scroll" continuously up or
down. The SR-5 remote's [PRESET] keys work similarly.
The Radio Data System (RDS) permits compatible FM receivers to display
text determined by the broadcaster. The C720BEE supports two RDS
modes, station-name (PS mode) and radio-text (RT mode). However, not
every FM station incorporates RDS in its broadcast signal; in most areas
you will find from one to several RDS enabled stations, but it is by no
means impossible that your favorite stations will not be broadcasting RDS
data.
CHOOSING THE FM MUTE / MODE
The front-panel FM MUTE/Mode key is a dual-purpose control. First, it
"toggles" the C720BEE between stereo mute and unmuted stereo
reception (assuming that a multiplex-stereo station of sufficient strength
is tuned). FM Mute eliminates noise from "empty" FM frequencies but
also mutes very weak or distant stations; it also causes the search
function to skip them. Toggling off the FM Mute will result in reduced
noise if the FM station signal level is less than the FM Stereo threshold
(since mono FM is inherently less noise-prone), though at the sacrifice of
the stereo effect.
VIEW RDS TEXT
When an RDS-enabled FM broadcast is tuned, after a brief delay the
"RDS" symbol will light in the C720BEE's front-panel readout and the
readout's character section will show its station-name (PS) text:
"ROCK101," for example. Press the front-panel DISPLAY key to toggle
the readout between this and the station's radio text (RT) readout, if any,
which might scroll song- or artist-name, or any other text of the station's
choosing.
NOTE: The one can store the same channel in two preset locations; one
with FM Mute On, and with FM Mute Off.
NOTE: Toggling between FM Mute on or off also defeats the C720BEE's
FM muting circuit. If you wish to listen to a particularly weak or distant
broadcast, toggle off the FM Mute and tune it manually.
ABOUT USER NAMES
You can assign an eight character "User Name" to each radio preset,
which will show in the front-panel readout whenever that preset is
recalled.
CHOOSING THE BLEND MODE
Weak or remote stereo radio stations are sometimes received with noise
and hiss as the antenna signal is too weak. Switching the tuner to mono
will reduce the amount of noise and hiss but at the expense of any stereo
information. The NAD Blend feature will allow you to reduce the amount
noise and hiss but still retain some level of stereo separation, instead of
mono.
ENTERING USER NAMES
For example, to name a radio preset "NEWS": recall the desired radio
preset, and then press the front-panel MEMORY key once, then within
five (5) seconds, press the front-panel DISPLAY key; the readout shows a
blinking box. Use the TUNE keys to select the first character of the name
("N" from the alphabetic list; press either PRESET key to select the
character and move to the next position. Repeat this process for each
character in sequence; press the MEMORY key again to store the User
Name and exit the text-entry mode.
The Blend button toggles between engaging or disengaging the Blend
feature; when engaged, "BLEND" lights up in the VFD.
NOTE: The one can store the same channel in two preset locations; one
with FM Blend On, and with FM Blend Off.
11
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SPECIFICATIONS
PRE-AMP SECTION
LINE LEVEL INPUTS(DISC, CD, VIDEO, AUX, TUNER, TAPE)
Input impedance (R and C)
Input sensitivity (1V out)
22kΩ+ 100pF
330mV
Maximum input signal
6V
Signal / noise ratio pre-amp out, A-weighted
Frequency response 20Hz - 20kHz
106dB ref. 500mV
< 0.1dB (Tone defeat on)
< 0.5dB (Tone defeat off)
< 0.01% at 5V out
THD + Noise, SMPTE IM
LINE LEVEL OUTPUTS
Output impedance Pre-out
Tape Source
80Ω
Z + 200Ω
>11V
Maximum output level Pre-out
Tape
>11.5V
TONE CONTROLS
IR / TRIGGER OUT
Treble
Bass
5dB at 10kHz
8dB at 100Hz
Input resistance
Input voltage Minimum
Output resistance
Output current
>100Ω
5V
<10Ω
50mA
12V
Output voltage
POWER AMP SECTION
Continuous output power into 8Ω
2
2x50W (17dBW)
0.03%
Rated distortion (THD 20Hz - 20kHz)
Clipping power
(maximum continuous power per channel 4Ωand 8Ω)
65W
IHF Dynamic headroom 8Ω
+3.4dB
+5.0dB
4Ω
IHF dynamic power
(maximum short term power per channel) 8Ω
4Ω
110W (20.4dBW)
160W (22.0dBW)
220W (23.2dBW)
>110
2
2Ω
Damping factor (ref. 8Ω, 1kHz)
Input impedance (R & C)
20kΩ + 470pF
630mV
Input sensitivity (rated output into 8Ω)
Voltage gain
29dB
Frequency response 20Hz - 20kHz
Signal/noise ratio, A-weighted ref. 1W
ref. 50W
+/- 0.2 dB
100dB
117dB
1
Signal / Noise ratio A-weighted
95.0dB ref. 1W
<0.03%
3
THD + Noise
4
SMPTE IM
<0.02%
5
IHF IM
<0.01%
Headphone output impedance
100Ω
12
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SPECIFICATIONS
TUNER SECTION
Input sensitivity
50dB
Mono: 16.1dBf
Stereo: 36.1dBf
FM Mono: 0.3%
FM Stereo 0.5%
Mono 60dB
Harmonic Distortion;
Harmonic Distortion;
Signal / noise;
Signal / noise;
Stereo 55dB
Stereo separation at 1kHz;
Frequency Response;
40dB
1.5dB 30Hz - 15kHz
PHYSICAL SPECIFICATIONS
Dimensions (W x H x D)
Net weight
435 x 147 x 387mm
8.7kg (19.2lb)
Shipping weight
11.4kg (25.1lb)
1
From CD input to speakers output, volume setting for 500mV in, 8Ω 1W out
Minimum power per chnnel, 20Hz - 20kHz, both channels driven with no more than rated distiortion.
Total harmonic distortion, 20Hz - 20kHz from 250mW to rated output
Interrmodulation distortion, 60Hz - 7kHz, 4:1, from 250mW to rated output
CCIF IM distortion, 19 + 20kHz 250mV to rated output
2
3
4
5
13
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TROUBLESHOOTING
PROBLEM
CAUSE
SOLUTION
NO SOUND
•
Power AC lead unplugged or power not
switched on
•
Check if AC lead is plugged in and power
switched on
•
•
Tape Monitor selected
Mute on
•
•
De-select Tape Monitor mode
Switch off Mute
NO SOUND ON ONE CHANNEL
•
•
Speaker not properly connected or damaged.
Input lead disconnected or damaged
•
•
Check connections and speakers
Check leads and connections
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
IR receiver in direct sun or very bright ambient
light
•
•
•
Check or replace batteries
Remove obstruction
Place unit away from direct sun, reduce amount
of ambient light
NO SOUND WITH TUNER
•
•
Antenna leads incorrectly connected
Station not selected or weak signal with FM
Mute on.
•
•
Check antenna connections to receiver
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.
Check station tuning. Adjust or replace antenna
Multi-path signals or interference from another
station
WHISTLES OR BUZZES ON FM & AM
WHISTLES OR BUZZES ON AM
NO RDS NAME (PS)
•
•
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
•
•
Station signal too weak.
Station not transmitting RDS data
•
•
Check station tuning. Adjust or replace antenna
No remedy
14
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©2005 NAD ELECTRONICS INTERNATIONAL
A DIVISION OF LENBROOK INDUSTRIES LIMITED
All rights reserved. No part of this publication may be reproduced, stored or transmitted in any form without the written permission of NAD Electronics International
C 720BEE Manual 0105 Printed in China
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