NAD Stereo Receiver C720BEE User Manual

®
C720BEE  
Stereo Receiver  
Owners Manual  
Manuel d’Installation  
Bedienungsanleitung  
Gebruikershandleiding  
Manual del Usuario  
Manuale delle Istruzioni  
Manual do Proprietário  
Bruksanvisning  
 
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  
users 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 ‘Lor 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
 
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
 
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
 
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
 
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
 
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
 
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
 
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  
 
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  
 
SPECIFICATIONS  
PRE-AMP SECTION  
LINE LEVEL INPUTS(DISC, CD, VIDEO, AUX, TUNER, TAPE)  
Input impedance (R and C)  
Input sensitivity (1V out)  
22k+ 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 4and 8)  
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. 8, 1kHz)  
Input impedance (R & C)  
20k+ 470pF  
630mV  
Input sensitivity (rated output into 8)  
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  
 
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, 81W 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  
 
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  
 
©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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