NAD C715 DAB User Manual

®
C 715 DAB  
CD Receiver  
Owner’s Manual  
IMPORTANT SAFETY INSTRUCTIONS  
23.Battery Disposal - When disposing of used batteries, please comply  
with governmental regulations or environmental public instruction’s  
rules that apply in your country or area.  
24.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.  
25.Wall or Ceiling Mounting - The product should be mounted to a wall  
or ceiling only as recommended by the manufacturer.  
This equipment generates, uses and can radiate radio frequency energy and if  
not installed and used in accordance with the instructions, may cause harmful  
interference to radio communications. however, there is no guarantee that  
interference will not occur in a particular installation. If this equipment does  
cause harmful interference to radio or television reception, which can be  
determined by turning the equipment off and on, the user is encouraged to try  
to correct the interference by one or more of the following measures  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment into an outlet on a circuit different from  
that to which the receiver is connected  
WARNING  
The lightning flash with arrowhead symbol, within an  
equilateral triangle, is intended to alert the user to the presence  
of uninsulateddangerous voltagewithin the product’s  
enclosure that may be of sufficient magnitude to constitute a  
risk of electric shock to persons  
Consult the dealer or an experienced radio/TV technician for help.  
FCC WARNING  
Changes or modifications not expressly approved by the party responsible  
for compliance could void the user’s authority to operate the equipment.  
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.  
INDUSTRY CANADA REQUIREMENT  
This Class b digital apparatus meets all requirements of the Canadian  
Interference-Causing Equipment Regulations.  
CAUTION REGARDING PLACEMENT  
To maintain proper ventilation, be sure to leave a space around the unit  
(from the largest outer dimensions including projections) than is equal to,  
or greater than shown below.  
left and Right Panels: 10 cm  
Rear Panel: 10 cm  
Top Panel: 50 cm  
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,  
DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE AND  
OBJECTS FILLED WITH LIQUIDS, SUCH AS VASES, SHOULD NOT BE  
PLACED ON THIS APPARATUS.  
IMPORTANT INFORMATION TO 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:  
ThE APPARATUS ShoUlD bE INSTAllED NEAR To AN EASIly ACCESSIblE  
SoCkET-oUTlET.  
CAUTION  
The C 715 employs a laser System. To ensure proper use of this product,  
please read this owner’s manual carefully and retain for future reference.  
Should the unit require maintenance, contact an authorized service  
location. Use of controls, adjustments or the performance of procedures  
other than those specified may result in exposure to laser radiation. To  
prevent direct exposure to laser beam, do not try to open the enclosure.  
Visible laser radiation when the enclosure is opened.  
IMPORTANT  
DO NOT make any connection to the larger terminal which is marked  
with the letterEor by the safety earth symbol or colored GREEN or GREEN  
AND yElloW. The wires in the mains lead on this product are colored in  
accordance with the following code:  
blUE - NEUTRAl  
DO NOT STARE INTO BEAM.  
bRoWN - lIVE  
FCC NOTICE  
As these colors may not correspond with the colored markings identifying  
the terminals in your plug, proceed as follows:  
This equipment has been tested and found to comply with the limits for a  
Class b digital device, pursuant to part 15 of the FCC Rules. These limits are  
designed to provide reasonable protection against harmful interference in a  
residential installation.  
The blUE wire must be connected to the terminal marked with the  
letterNor colored blACk.  
The bRoWN wire must be connected to the terminal marked with the  
letterlor colored 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.  
IMPORTANT SAFETY INSTRUCTIONS  
This product is manufactured to comply with the radio  
interference requirements of EEC DIRECTIVE 2004/108/EC.  
NOTES ON ENVIRONMENTAL PROTECTION  
At the end of its useful life, this product must not be disposed  
of with regular household waste but must be returned to a  
collection point for the recycling of electrical and electronic  
equipment. The symbol on the product, user’s manual and  
packaging point this out.  
The materials can be reused in accordance with their markings. Through  
re-use, recycling of raw materials, or other forms of recycling of old  
products, you are making an important contribution to the protection of  
our environment.  
your local administrative office can advise you of the responsible waste  
disposal point.  
RECORD YOUR MODEL NUMBER (NOW, WHILE YOU CAN SEE IT)  
The model and serial number of your new C 715 are located on the back of  
the cabinet. For your future convenience, we suggest that you record these  
numbers here:  
Model number : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Serial number : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
NAD is a trademark of NAD Electronics International, a division of lenbrook Industries limited  
Copyright 2007, NAD Electronics International, a division of lenbrook Industries limited  
INTRODUCTION  
TABLE OF CONTENTS  
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
RDS MoDE oPTIoNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
PRoGRAM TyPE (PTy) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
lISTENING To DAb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
AboUT DAb ANTENNA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
DAb oPERATIoN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
AUTo TUNE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
ChANNEl lIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
FUNCTIoN CoNTRol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
STATIoN oRDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
PRESET TUNE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
DRC VAlUE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
MANUAl TUNE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
INFoRMATIoN SETTINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
USING THE C 715 – EXTERNAL SOURCES AND TIMER . . . . . . . . . . . . .ꢀ1  
lISTENING To EXTERNAl SoURCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
SETTING ThE CloCk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
SETTING ThE oN/oFF TIMER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
ACTIVATE TIMER oPERATIoN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22  
USING THE C 715 – OTHER FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . .ꢁ  
ToNE/bAlANCE/DIMMER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23  
oThER SR 7 FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23  
NUMERIC kEy PAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23  
REPEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23  
REPEAT A-b. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23  
RANDoM PlAy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24  
TIME. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24  
TEXT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24  
MUTE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24  
SlEEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24  
INTRODUCTION  
GETTING STARTED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
UNPACkING AND SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6  
QUICk START . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6  
DEAlING WITh hUM AND NoISE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6  
FACToRy DEFAUlT SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6  
IDENTIFICATION OF CONTROLS  
FRONT PANEL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
REAR PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
SR 7 REMOTE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10  
OPERATION  
USING THE C 715 – CD MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11  
CD-R AND CD-RW AUDIo DISCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
PlAyING MP3/WMA FIlES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
PRoGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
USING THE C 715 – USB MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1ꢁ  
lISTENING To USb DEVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
SElECTING DIRECToRIES oR FIlES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
RECoRDING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
SETTING ThE RECoRD MoDE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
RECoRDING To USb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
DElETE A FIlE FRoM USb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
DISCoNNECT EXTERNAl USb DEVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
USING THE C 715 – TUNER MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15  
lISTENING To AM/FM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
AboUT ANTENNAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
ASSEMblING ThE looP ANTENNA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
TUNING MoDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
SETTING RADIo PRESETS (AM / FM / DAb). . . . . . . . . . . . . . . . . . . . . . . . . . 15  
ChooSING ThE FM MoDES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
RDS oPERATIoN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
REFERENCE  
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ꢀ5  
NOTES ON DISCS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ꢀ5  
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6  
THANK YOU FOR CHOOSING NAD  
The C 715 DAb CD Receiver is a technologically advanced and highly  
capable product-yet we have invested great effort in making it simple  
and easy to use. The C 715 delivers a range of genuinely useful options  
for stereo listening using powerful digital signal processing and superbly  
accurate digital-audio circuitry. however, we have also been careful to  
ensure that the C 715 is as musically transparent and spatially accurate  
as possible, incorporating much of what we’ve learned from a quarter-  
century’s experience designing audio and home-theatre components. As  
with all our products, NAD’sMusic Firstdesign philosophy guided the  
C 715’s design, such that it can confidently promise you both state-of-the-  
art and audiophile-quality music listening for years to come.  
We encourage you to take a few minutes now to read right through this  
manual. Investing a little time here at the outset might save you a good  
deal of time later, and is by far the best way to ensure that you make the  
most of your investment in the C 715.  
one more thing: We urge you to register your C 715 ownership on the NAD  
Worldwide Web site:  
For warranty information contact your local distributor.  
5
INTRODUCTION  
GETTING STARTED  
UNPACKING AND SETUP  
WHAT’S IN THE BOX  
DEALING WITH HUM AND NOISE  
hum and noise sometimes may prove a challenge in audio systems. Note  
these considerations to help prevent hum and noise problems:  
Packed with your C 715 you will find:  
Power all your system's audio component from AC outlets originating  
from the same circuit of your house wiring. As far as possible, power  
all audio components from the same outlet, or adjacent outlets on the  
same circuit. It may be useful to power video displays (and computers!)  
from outlets on another circuit, especially if that circuit is supplied from  
the other "leg" of the house wiring.  
An AM loop antenna.  
A FM lead-type antenna.  
A F-type DAb antenna.  
The SR 7 remote control with 2 (two) AAA batteries.  
This owner’s manual.  
Do not bundle analog audio cables with AC power cables, or with  
coaxial digital-audio cables. It is best if they cross at right angles if they  
must be in close proximity.  
SAVE THE PACKAGING  
Please save the box and all of the packaging in which your C 715 arrived.  
Should you move or otherwise need to transport your C 715, this is by far  
the safest container in which to do so. We’ve seen too many otherwise  
perfect components damaged in transit for lack of a proper shipping  
carton, so please: Save that box!  
Employ high-quality, well-shielded audio cable throughout, and ensure  
that all connections are secure.  
A pencil-eraser can be used to burnish copper- and gold-plated  
contacts to ensure good, low-resistance contact; specialized contact-  
cleaners can also be useful. Avoid unnecessary unplugging and  
re-plugging since the gold (or copper) contact plating of typical cable  
connectors, even very high-quality ones, is very thin and easily worn.  
CHOOSING A LOCATION  
Choose a location that is well ventilated (with at least several inches to both  
sides and behind), and that will provide a clear line of sight, within 23 feet/7  
meters, between the C 715’s front panel and your primary listening/viewing  
position. This will ensure reliable infrared remote control communications.  
The C 715 generates a modest amount of heat, but nothing that should  
trouble adjacent components. It is perfectly possible to stack the C 715 on  
top of other components.  
Track down hum/noise problems one component at a time, working  
backwards from the C 715. That is  
1
2
Connect the speakers to the C 715 only, and check for hum.  
Then connect one component only (a CD player, for example) alone,  
with no other components connected and check for hum.  
Connect additional components, one at a time, to the C 715 and check  
for hum.  
3
QUICK START  
In case you simply cannot wait to experience the performance of your new  
NAD C 715 CD Receiver, we provide the followingQuick Startinstructions  
to get you underway.  
At each stage, if hum/noise appears, examine the audio cabling and AC-  
power routing of the new component. In some cases, moving the new  
component's AC cord to a different outlet, or installing a ground-lift (3-to-2-  
prong adapter) on its power cord, will eliminate the hum.  
Please make all the connections to your C 715 with the unit unplugged.  
It is also advisable to power-down or unplug all associated components  
while making or breaking any signal or AC power connections.  
FACTORY DEFAULT SETTINGS  
Sometimes power spikes and drop-outs may from time to time cause some  
inadvertent functionality. The procedure below will set the C 715 to factory  
default settings  
PLAY A CD  
Connect your left and right front speakers to the C 715’slandR”  
outputs. Make sure to connect red to red (“+”) and black to black (“-”)  
with care to avoid stray wires or strands crossing between terminals.  
If your system includes a powered subwoofer, connect the C 715’s  
“SUbWooFER oUTjack to its line input.  
1
Turn oFF C 715 by pressing the power button in the front panel or SR 7  
remote control’s [oFF] key.  
2
Press and hold front panel’s [FM MoDE / ] key for more than two  
seconds. The C 715 will switch itself back oN and all the settings are  
restored to factory default settings.  
Plug the AC mains plug into the AC outlet; the lED on the front panel  
will be illuminated amber indicating the C 715 is in standby mode ready  
to accept commands from either the front panel power switch or the  
SR 7 remote.  
Please note that setting the C 715 to factory default will delete all AM, FM  
and DAb presets.  
To start CD playback, toggle [SoURCE] button in the front panel until  
“CDmode or press directly SR 7’s [CD] source key. Press for the disc  
tray to draw open.  
Insert the media and press the button to start playback.  
6
IDENTIFICATION OF CONTROLS  
FRONT PANEL  
16  
17  
18  
2
1
3
4
5
6
7
8
9
10 11  
12 13 14 15  
1
POWER: Press this button to switch oN the C 715. The Standby lED  
indicator will turn from amber to blue and illuminate the Vacuum  
Fluorescent Display (VFD). Pressing the power button again turns the  
unit back to standby mode.  
7
FM MODE/ (PAUSE) [ ] : In FM mode, this button will toggle between  
FM Stereo and FM Mono. The front panel [FM MoDE] key is a dual-  
purpose control. In the normal position, (“STEREoandTUNEDicons  
are illuminated in the VFD) only the stations with a strong signal can be  
listened to and the noise between stations is muted.  
If the disc tray is open and the C 715 is powered oFF, the disc tray will  
draw close and the unit powered oFF.  
Pressing the [FM MoDE] button again (“STEREoicon is extinguished;  
onlyTUNEDis illuminated) allows distant and potentially noisy stations  
to be received. Noise is reduced 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 stereo effect.  
2
3
INDICATOR: This indicator will light up amber when the C 715 is  
in standby state. When the C 715 is at oN state, this indicator will  
illuminate blue.  
DISC TRAY: With the DISC TRAy open, insert a compatible media disc  
In CD or USb mode, press this button to toggle between Pause and Play  
face down onto the tray.  
of a compatible media disc.  
No Discappears on the C 715’s VFD if the disc is placed upside down.  
8
RDS MODE/ (STOP) [ ]: When tuned to a RDS station, toggle this  
button to cycle through the following RDS modes:  
4
SOURCE: Toggle this button to select through the following sources:  
PRoGRAM SERVICE  
RDS CloCk TIME  
FM / AM / DAb CD USb  
MP AUX VIDEo TAPE  
5
6
RECORD: Use this button to start recording to a USb device.  
RDS PRoGRAM TyPE  
RDS RADIo TEXT  
BAND / (PLAY) [ ]: In CD or USb mode, press this button to start  
playback. If the disc tray is open, press this button to automatically  
close the tray and start playback if a disc is loaded.  
TRAFFIC ANNoUNCE  
In AM/FM/DAb mode, toggle this button to select AM, FM or DAb  
Refer to the sectionRDS MoDE oPTIoNSfor a description of the above  
mode.  
modes.  
In CD or USb mode, press this button to stop playback and re-set the  
pickup to the beginning of the disc. The display reverts to showing the  
total number of tracks and total playing time of an audio disc or total  
number of WMA/MP3/Audio files. If the C 715 was programmed to play  
a selection of tracks, the program will be retained in the memory.  
7
IDENTIFICATION OF CONTROLS  
FRONT PANEL  
9
TIME MODE: In conjunction with [TUNE/TIME] keys, toggle this button  
15 TUNE / TIME / [  
/
] / [  
/
] : In AM/FM mode, press to  
to cycle through the following timer modes:  
step up or down stored presets. Press these buttons for manual or auto  
scanning of AM/FM band.  
Current time on time  
Source select off time  
In CD or USb mode, press  
to skip forward or  
to skip backward  
a track or file. Press and hold  
or for more than 2 seconds to  
Refer to the sectionsSETTING ThE CloCkandSETTING ThE oN/oFF  
TIMERfor a description of the above modes.  
search up or down a track or file. Release the button to resume normal  
playback.  
10 TONE/BAL/DIMMER: Toggle this button to adjust tone, balance and  
Use these buttons in combination with other relevant keys to setup  
timer settings.  
dimmer settings in combination with [VolUME] knob.  
11 TUNE MODE/SELECT/ [OPEN / CLOSE ]: In FM/AM mode, toggle  
These buttons are also used to step or scroll through applicable options  
either independently or in combination with other buttons.  
this button to cycle through the following tuning modes:  
Manual tune Auto tune  
Preset tune  
16 REMOTE SENSOR: Point the SR 7 remote control at the remote sensor  
and press the buttons. Do not expose the remote sensor of the C 715 to  
a strong light source such as direct sunlight or illumination. If you do so,  
you may not be able to operate the C 715 with the remote control.  
In CD mode, press this button to open and close the disc tray.  
Use this button in combination with other relevant keys to setup timer  
settings.  
Distance: About 23ft (7m) from the front of the remote sensor.  
Angle: About 30o in each direction of the front of the remote sensor.  
When in standby mode, this button will also power oN the C 715 and at  
the same time open the disc tray.  
17 Vacuum Fluorescent Display (VFD): Provides visual information  
about the unit’s important modes, settings, functions, status of the  
current source like disc playback time and other indicators.  
12 USB: Connect an external USb device into this input.  
18 VOLUME: Turn clockwise to increase the volume setting; counter  
clockwise to lower it. The VFD shows the VolUME setting displayed as  
increments between 1 through to 62. “VolUME MINwill be displayed  
when volume setting is at its lowest level andVolUME MAXwhen  
volume is at its highest level.  
13 PHONES: Accepts stereo headphone using a standard 1/8-inch stereo  
phone plug. Plugging in headphones automatically mutes output from  
the speakers; however, subwoofer output will not be cutoff.  
14 MP: Connect your MP3’s standard stereo phone jack to this input.  
In conjunction with the [ToNE/bAl/DIMMER] button, turn [VolUME]  
clockwise or counterclockwise to adjust the tone, balance and dimmer  
functions.  
IDENTIFICATION OF CONTROLS  
REAR PANEL  
8
7
6
5
4
1
2
3
ATTENTION!  
Please make sure that the C 715 is powered off or unplugged before making any connections. It is also advisable to power down or unplug all associated  
components while making or breaking any signal or AC power connections.  
1
SPEAKERS: Connect the left and right terminals to the corresponding  
loudspeakers. Make sure that the “+(red) terminal and-(black)  
terminal are connected to the corresponding+and-terminals of the  
loudspeaker. Use extra care to ensure that no stray wires or strands cross  
between posts or terminals at either end.  
4
TAPE IN/OUT: Connections for analog recording and playback to an  
audio tape recorder of any type. Using twin RCA-to-RCA leads, connect  
the left and rightAudio outputof the tape machine to the C 715’s  
TAPE IN sockets for playback and tape monitoring. Connect the left and  
rightAudio Inputof the tape machine to C 715’s TAPE oUT sockets for  
recording.  
NOTES  
Use stranded wire of at least 16-gauge (AWG); specialized speaker cable  
NOTE  
There will be no output at TAPE OUT when TAPE is selected. Likewise,  
may be valuable (consult your NAD audio specialist). Connections to the  
C 715 can be made with banana-type plugs, or using bare wire, or pins,  
by loosening the terminal’s plastic nut, making a clean, neat connection,  
and re-tightening carefully. To minimize the danger of short-circuits,  
ensure that only 1/2-inch of exposed wire or pin is employed in  
connecting.  
This unit is designed to produce optimum sound quality when  
connected to speakers with impedances within the receiver’s operating  
range. Please check that speakers are rated to be 6 ohms minimum per  
speaker.  
there will be no output at VIDEO OUT when VCR is the active source  
input. This prevents feedback through the recording component thereby  
preventing possible damage to your speakers.  
5
6
VCR IN/OUT: VCR may be used with recording components such  
as a cassette deck. Connect analog stereo audio from such source  
components into the C715’s VCR IN. Connect the C 715’s VCR oUT to  
the source componentsrecord-input. Note that VCR may freely be used  
for play-only components, in which case the oUT jacks would remain  
unconnected.  
2
FM / AM / DAB ANTENNA INPUT: Connect the supplied lead-type  
FM antenna to the FM antenna input. Extend the lead. Experiment freely  
with your antenna placement and orientation until you get the clearest  
sound and lowest background noise. Fix the antenna in the desired  
position by using thumb tacks, push pins or any suitable means.  
AUX IN: Input for additional line level input such as another CD player.  
Use a twin RCA-to-RCA lead to connect the auxiliary unit’s left and right  
“Audio outputto this input.  
7
8
SUBWOOFER OUT: Connect this output to a powered (“active”)  
subwoofer (or to a power amplifier channel driving a passive system).  
The AM loop antenna supplied with the C 715 (or a suitable  
replacement) is required for AM reception. open the clip terminal  
lever; insert the wire making sure to match the color-coded (white  
and black) ends of the wire to that of the terminal and close the  
lever 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.  
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.  
Connect the supplied F-type DAb antenna to the DAb antenna input.  
3
OPTICAL DIGITAL OUT: Connect the oPTICAl DIGITAl oUT port to  
the corresponding S/PDIF digital input of a compatible device such as  
CD recorders, receivers, computer soundcard or other digital processors.  
9
IDENTIFICATION OF CONTROLS  
SR 7 REMOTE CONTROL  
1
2
ON : Power oN C 715.  
9
OFF : Power oFF C 715.  
1
9
LED indicator : Flashes when a command  
is sent.  
10 RECORD : Start recording.  
2
3
REC MODE : Select desired record mode.  
3
4
CD, USB, TUNER, TAPE, VIDEO, AUX, MP :  
Select a Source.  
11 MEMORY : Save current station into preset  
10  
memory.  
4
5
TIMER : Access timer modes.  
SLEEP : Set sleep mode timer.  
DIMMER : Toggle to either reduce or restore  
normal VFD brightness.  
12 SELECT : Select tuning mode.  
13 TUNE  
: Step/tune up or down the  
selected tuning mode.  
11  
12  
5
BAND : Select AM, FM or DAb mode.  
FM MODE/FUNCTION : Switch between  
FM stereo and FM Mono mode; Select DAb  
function modes.  
RDS/INFO : Access RDS modes; Display DAb  
information.  
14 RANDOM : Play tracks/files in random order.  
STOP : Stops playback.  
6
7
PAUSE : Pause playback temporarily.  
PLAY : Starts playback.  
REPEAT : Repeat track, file or folder.  
RPT A-B : Repeat sequence.  
13  
AUTO TUNE : Automatic scanning of DAb  
stations.  
SKIP  
SKIP  
: Go to next track or file.  
: Go to beginning of current  
track/file or to previous track/file.  
PROGRAM : Enter or exit program mode.  
CLEAR : Remove a track or file number on  
the program list.  
6
7
8
0-9 number buttons : Direct-entry of track  
or file number.  
14  
15  
MUTE : Mute audio.  
SCAN  
SCAN  
: Press for fast forward search.  
: Press for fast reverse search.  
VOLUME  
: Adjust volume level.  
8
TIME : Show playback time display.  
TEXT : Display file information.  
15 FOLDER  
FILE  
: Select through folder lists.  
: Select through WMA/MP3 files.  
ENTER : Select desired folder or  
WMA/MP3 file.  
Press in and lift tab to remove battery cover out  
of recess.  
Press batteries into opening. Ensure correct  
fitting is observed.  
Replace battery cover by aligning and inserting  
the two tabs into the holes. Press battery cover  
into place untilclicksclosed.  
10  
OPERATION  
USING THE C 715 – CD MODE  
CD-R AND CD-RW AUDIO DISCS  
PROGRAMMING  
Aside from normal CD audio discs, the C 715 can play back CD-R or CD-  
RW audio discs that have been recorded on a computer or CD recorder.  
The quality of CD-R, CD-RW audio discs varies widely which may affect  
playability. Some factors that affect playability:  
The program function enables you to organize your favorite songs  
according to your preference. When programming a sequence of tracks,  
the C 715 must be in SToP mode. Using the SR 7 remote control, enter your  
desired program sequence through the following steps  
The quality of the disc itself. Generally speaking, CD-R, CD-RW blanks  
from well-renowned companies give better results than unbranded  
ones.  
1
Press [PRoGRAM]. The display indicatesP00 T00.  
The quality of CD-recorder or computer CD re/writer. Some recorders  
and writers produce better results than others.  
The CD-R and CD-RW were created with high-speed writing. In general,  
the quality of a CD-R or CD-RW is better when produced at a lower  
speed against a higher speed on the same recorder or re/writer.  
2
Use the Direct-Entry numeric keypad buttons to enter the first track in  
your planned sequence. For example, to enter track number1,press0”  
and then1. Note that the as the digit0is keyed-in, “T_ _is blinking  
indicating that it is waiting for the second digit to be entered. Upon  
entering the second digit (i.e., number1”), the track section in VFD will  
stop blinking and showP-01 T01.” This indicates that the first program  
entry is completed.  
PLAYING MP3/WMA FILES  
The C 715 can play MP3/WMA formatted recordings on CD-R or CD-RW  
discs. you may mix any of the file types on the disc. Using the SR 7 remote  
control, one can select through the MP3/WMA folders and files as well as  
start playback through the following steps  
1
2
load the applicable disc.  
Press [FolDER  
] to select desired folder. Press [ENTER].  
3
Press [FIlE  
] to select desired file number. Press [ENTER] to start  
playback.  
3
4
The C715 is now ready for your second program entry. key-in the  
second track you desire to program. As in step 2, the track section will  
keep on blinking until the second digit is entered. As soon as the track  
number is fully entered, the blinking stops and the program sequence  
completed.  
Repeat steps 2 and 3 to select and store other track numbers in  
memory, up to a maximum of 30 entries. If you attempt to program  
more than 30 tracks or files, “P-FUllwill be displayed in the VFD.  
Press [PRoGRAM] to end or finalize the program – the VFD will show  
“P-End.  
NOTES  
Access to folders and files can be made at STOP or playback mode.  
Information about the Song Title, Album and Artist name, if available,  
will scroll through the VFD during playback.  
The file number is recognized per disc, not per folder – that is, the  
number assigned to each file corresponds to their sequence in the disc.  
If you want to select file number “9” in a disc where there are 100 or more  
MP3/WMA files, press “0” twice and then “9.”  
5
6
Press [ ] to start program playback.  
NOTES  
The procedure for programming MP3/WMA files and USB files are the  
same as above.  
At CD mode, the programmed sequence/contents will not be lost  
even though the C715 is powered OFF (standby) or the SOURCE mode  
changed. It will only be lost if the disc tray is opened.  
To recall the program sequence, press [PROGRAM] and then [ ] to  
playback the program.  
11  
OPERATION  
USING THE C 715 – CD MODE  
REVIEW PROGRAM LIST  
DELETE PROGRAM  
1
1
Initiate review of your programmed entries by pressing [PRoGRAM] at  
To delete a particular programmed track/file, press repeatedly  
[PRoGRAM] key in SToP mode until the desired programmed sequence  
is reached. Press SR 7’s [ClEAR] key once and the track/file in the  
particular sequence is deleted. The program sequence will adjust  
accordingly as a programmed track/file is deleted.  
SToP mode.  
2
3
The VFD will show the first Program Number.  
Press [PRoGRAM] repeatedly to step through the program sequence.  
you will have reached the end of the program sequence whenP-Endis  
displayed at the VFD.  
2
To clear the program memory, perform any of the following steps  
Press [oPEN] to open the disc tray.  
EDIT PROGRAM LIST  
1
Initiate editing of your programmed entries by pressing [PRoGRAM] at  
SToP mode.  
Press [PRoGRAM] at stop mode and then press and hold SR 7’s  
[ClEAR] key until the unit reverts to the default display, i.e. total track  
number and playback time.  
2
3
The VFD will show the first Program Number.  
Press [PRoGRAM] repeatedly to step through the program sequence.  
Stop at the program sequence you want to edit.  
4
To change the programmed track/file of a particular sequence, use the  
Direct-Entry numeric keypad buttons to overwrite the current track/file.  
5
Press [PRoGRAM] again to continue with other program track changes  
or press [SToP] to end the editing.  
1ꢀ  
OPERATION  
USING THE C 715 – USB MODE  
The C 715 can play back MP3/WMA files stored in external USb (Universal  
Serial bus) devices. The following are the C 715’s capabilities with respect to  
USb device playability.  
RECORDING  
With external USb devices, the C 715 can also record music from CDs,  
cassette tapes and tuners as well MP3 or WMA files.  
1
Playback of MP3/WMA files recorded in various USb devices such as USb  
flash memory, MP3 or hDD. The hDD must be formatted FAT 16 or FAT  
32, but not NTFS.  
BEFORE RECORDING  
The following are useful tips before you start recording  
2
3
Support USb 1.1 full speed (12Mbps).  
When more than 2000 files are recorded in the USb device, the C 715  
may not be able to play the files correctly.  
1
Prior to recording, verify with the use of your computer if your USb  
device has enough remaining capacity to record your desired audio  
selection.  
2
Adjust the volume level of the external audio source to suitable level  
before recording. If not, the recording quality becomes poor.  
LISTENING TO USB DEVICE  
1
Toggle [SoURCE] button to selectUSbmode. If no external USb device  
is connected to the front panel’s USb input, “Not connectedwill be  
displayed in the VFD.  
SETTING THE RECORD MODE  
RECoRD mode can be setup through the following steps  
1
At USb mode, press SR 7’s [REC MoDE] button.  
2
3
Plug-in the external USb device to the USb input USb readingwill  
be blinking in the VFD and then the total number of files will displayed.  
When an hDD device is connected to this unit, it may take several  
minutes to display the number of files.  
2
3
Toggle [FolDER  
] to step through the following modes:  
MP3 64k MP3 96k MP3 128k MP3 192k  
WMA 128k WMA 96k WMA 64k  
Press [ ] to start playback.  
To select desired RECoRD MoDE for MP3, press [ENTER] (within 3  
seconds) when you have arrived at the desired setting. Repeat the same  
for WMA.  
SELECTING DIRECTORIES OR FILES  
The following are steps on how to select a desired directory and MP3 or  
WMA file during playback or stop mode.  
1
2
Connect the external USb device to the front panel’s USb input.  
Press [FolDER  
] to select desired folder. Press [ENTER]  
BIT RATE  
[64k], [96k], [128k] or [192k] are bit rate values indicating the amount of  
data compression progress per second. The higher the bit rate, the larger  
the amount of data; this does not mean however that the sound quality is  
better. [128k] setting is recommended for listening enjoyment.  
3
4
Press [FIlE  
] to select desired file number.  
Press [ENTER] to start playback. Information about the Song Title, Album  
and Artist name, if available, will scroll through the VFD during playback.  
1ꢁ  
OPERATION  
USING THE C 715 – USB MODE  
RECORDING TO USB  
DELETE A FILE FROM USB  
With an external USb device, the following procedures will allow you to  
record as MP3/WMA file a source of CD, MP3/WMA disc, cassette deck, radio  
broadcast or other auxiliary devices.  
1
At USb mode, press [FolDER  
] to select a folder. Press [ENTER].  
1
2
Connect the external USb device to the front panel’s USb input.  
Press [SoURCE] to select the source you want to record.  
2
3
Press [FIlE  
] to select desired file number.  
Press and hold [ClEAR] button until the VFD shows  
[USB/DELETE?]  
3
4
Press [RECoRD] button and recording starts.  
AUDIO001.MP3  
To stop or end recording, press [SToP] button.  
4
Press [ClEAR] button again within 3 seconds; otherwise delete mode  
will be cancelled.  
DISCONNECT EXTERNAL USB DEVICE  
1
Press and hold [TIME MoDE] until the VFD shows a blinkingPls, remove  
USb.”  
NOTES  
Do not disconnect the USB storage device or power cord during  
recording. It may cause damage to the C 715.  
The recorded files are saved in the AUDIO folder. The file names are  
automatically saved sequentially as AUDIO001.MP3, AUDIO002.MP3…..  
2
Unplug the external USb device from the front panel’s USb input.  
1ꢂ  
OPERATION  
USING THE C 715 – TUNER MODE  
LISTENING TO AM/FM  
TUNING MODE  
The C 715’s internal AM/FM tuner offers very high quality sound from radio  
broadcasts. The reception and sound quality will always be dependent to a  
degree however on the type of antenna(s) used as well as proximity to the  
broadcast origin, geography and weather conditions.  
Toggle front panel’s [TUNE MoDE/SElECT] button (or SR 7’s [MEMoRy/  
SElECT] key) and the upper display will show [Manual Tune], [Auto tune]  
and [Preset tune].  
MANUAL TUNE  
SELECTING AM/FM  
Press [  
/
/
/
] on the front panel (or SR 7’s [TUNE  
])  
Press [SoURCE] button repeatedly until AM/FM/DAb mode.  
momentarily to step up or down between AM or FM frequencies. Release  
the button when you find your desired station.  
AUTO TUNE  
Press [  
at the next sufficiently strong signal it encounters. Pressing [  
] during the search process will stop the search.  
/
/
/
] (or SR 7’s [TUNE  
] key) - the C 715 will stop  
/
/
/
Toggle the [bAND] button to select AM or FM band.  
PRESET TUNE  
Use the [  
/
/
/
] on the front panel to step up or down  
between presets. Press and hold [  
/
/
/
] to scroll  
continuously up or down. The SR 7’s [TUNE  
presets will be skipped during tuning.  
] key work similarly. Empty  
SETTING RADIO PRESETS (AM / FM / DAB)  
The C 715 can store up to 30 FM, 30 AM and 10 DAb stations for immediate  
recall.  
ABOUT ANTENNAS  
Connect the supplied lead-type FM antenna to the FM antenna input.  
Extend the lead. Experiment freely with your antenna placement and  
orientation until you get the clearest sound and lowest background noise.  
Fix the antenna in the desired position by using thumb tacks, push pins or  
any suitable means. 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.  
MANUAL PRESET  
1
Toggle the [bAND] button to select AM, FM or DAb.  
The supplied AMloopantenna will usually provide adequate reception.  
however, an exterior AM antenna can be used to improve reception.  
Consult an antenna professional for more information.  
2
To store a radio preset, first tune the desired frequency (see above), then  
press SR 7’s [MEMoRy] key.  
ASSEMBLING THE LOOP ANTENNA  
1
Rotate the outer frame of the antenna.  
“Ch _ _starts blinking indicating that it is waiting for you to enter your  
desired preset number allocation. Use the Direct-Entry numeric keypad  
buttons to enter the desired preset number. For example, to enter  
Preset number1,press0and then1. Note that the as the first digit0”  
is keyed-in, “Ch0 _is blinking indicating that it is waiting for the second  
digit to be entered. Upon entering the second digit (i.e., number  
“1”), “Ch01stops blinking. This indicates that the first preset entry is  
completed.  
2
Insert the bottom edge of the outer frame  
into the groove on the stand.  
The same condition applies for DAb mode with01of the displayed  
“PRESET MEMoRy 01blinking also.  
3
Repeat steps 2 and 3 to store up to 30FM, 30AM and 10 DAb stations.  
3
Extend the antenna cord.  
NOTE  
A new station can be directly entered into an existing programmed  
Memory Preset. The new station will overwrite all the data previously  
held on that Preset number.  
15  
OPERATION  
USING THE C 715 – TUNER MODE  
AUTOMATIC PRESET (AM/FM ONLY)  
Preset stations may also be programmed automatically for the entire FM (or  
AM) band.  
RDS OPERATION  
Radio Data System (RDS) transmits station call signs or network information,  
station program type, text messages about the station or specifics of a  
musical selection and the time.  
1
Toggle the [bAND] button to select AM or FM band.  
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.  
RDS MODE OPTIONS  
When an RDS-enabled FM broadcast is tuned, aRDSicon will illuminate in  
the C 715’s VFD.  
Toggle [RDS MoDE] to show the following:  
2
Press and hold SR 7’s [MEMoRy] key. Release [MEMoRy] key whenAuto  
Memorystarts to blink in the VFD. Up to 30 of the best received FM  
stations (or 30 AM stations) will be automatically stored.  
PROGRAM SERVICE  
“Program Servicewill blink for about 3 seconds and then the program  
service name or a station’s name will be displayed. “P Swhich stands for  
“Program Servicewill be displayed in the upper left side of the VFD. If there  
is no program service data, the frequency will be displayed.  
CHOOSING THE FM MODES  
In FM mode, the front panel [FM MoDE] key is a dual-purpose control. In  
the normal position, (“STEREoandTUNEDicons are illuminated in the  
VFD) only the stations with a strong signal can be listened to and the noise  
between stations is muted.  
RDS CLOCK TIME  
The current time of the day will be displayed as transmitted by the station.  
It will take 3-5 seconds for the time to appear. In the meantime, the word  
“RDS CloCk TIMEwill flash in the display. When available, the time is  
then displayed. Note that the accuracy of the time message is set by the  
radio station, not by the C 715. “C Twhich stands forClock Timewill be  
displayed in the upper left side of the VFD. If there is no time data supplied,  
“00:00will be displayed.  
Pressing the [FM MoDE] button again (‘STEREoicon is extinguished; only  
“TUNEDis illuminated) allows distant and potentially noisy stations to be  
received. Noise is reduced 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 stereo effect.  
RDS PROGRAM TYPE  
Program Type (PTy) allows users to find similar programming by genre.  
Please find the section below aboutPRoGRAM TyPE (PTy)for more  
information about RDS Program Type.  
RDS RADIO TEXT  
A Radio Text message containing special information from the RDS station  
will scroll through the VFD (up to 64 symbols can be displayed). It will take  
3 takes seconds for the text message to appear. In the meantime, the word  
“RDS RADIo TEXTwill flash in the display. When available, the Radio Text is  
then displayed. “R Twhich stands forRadio Textwill be displayed in the  
upper left side of the VFD. If no Radio Text is available, the display will show  
the Program Service.  
TRAFFIC ANNOUNCE  
When selected, “TRAFFIC ANNoUNCEwill blink for 3 seconds. After 3  
seconds, the C 715 will scan (SEARCh and a blinking“ > ”is displayed) the  
FM band searching for available traffic announcements. “T Awhich stands  
forTraffic Announcewill be displayed in the upper left side of the VFD.  
“TRAFFIC ANNoUNCE (T A)mode is switched to Program Service (P S)  
mode when a traffic program is found. once a station transmitting traffic  
program signal is selected, the C 715 will stop searching for traffic program  
and then switch toProgram Servicemode.  
16  
OPERATION  
USING THE C 715 – TUNER MODE  
PROGRAM TYPE (PTY)  
The following is a list of available Program Type selections.  
A major benefit of RDS is its ability to encode broadcasts with Program Type  
(PTy) codes that indicate the type of material being broadcast.  
News  
News.  
Current Affairs  
Current Affairs.  
1
Toggle the [bAND] button to select FM band.  
Information. References such as consumer guides, medical  
assistance and so on.  
Information  
Sport  
Sport.  
Education  
Drama  
Educational and cultural information.  
Drama.  
National and local culture including religious events,  
philosophy, theater and so on.  
Cultures  
2
Press and hold [RDS MoDE] untilRDS PRoGRAM TyPEis shown in the  
VFD.  
Science  
Programs on natural science and technology.  
Popular programs such as quiz, entertainment, comedy, satire  
and so on.  
Varied Speech  
Pop Music  
Rock Music  
Program on commercial, practical and popular songs  
Practical modern music generally composed and played by  
young musicians.  
Easy Listening  
Light Classics M  
Easy listening music.  
Classical Music, instrumental music, chorus and light music.  
3
4
5
Use the [TUNE/TIME/] front panel buttons (or SR 7’s [TUNE  
select the desired RDS PRoGRAM TyPE.  
]) to  
Orchestra including great operas, symphony, chamber music  
and so on.  
Serious Classics  
Other Music  
Weather & Metr  
Finance  
Other music styles (rhythm and blues, reggae, etc.)  
Weather reports, forecast.  
Financial reports, commerce, trading.  
Children’s Programs  
Children’s Progs  
Social Affairs  
Religion  
Social Affairs  
once you have found the program type you would like to listen, press  
[TUNE MoDE/SElECT].  
Religious programs  
Phone In  
Program in which public expresses its view by phone.  
Travel reports  
Travel & Touring  
Leisure & Hobby  
Jazz Music  
Programs concerning recreational activity.  
Jazz Music  
Country Music  
National Music  
Oldies Music  
Folk Music  
Country Music  
National Music  
Press the [TUNE/TIME/] front panel buttons (or SR 7’s [TUNE  
the PTy search (the Program Type andSEARCh >will interchangeably  
blink in the VFD).  
]) to start  
Music from the so-called golden years of popular music.  
Folk Music  
Documentary  
Alarm Test  
Documentaries  
Alarm test  
Alarm-Alarm!  
A program notifying an emergency or a natural disaster.  
6
When a compatible station is tuned, the search will stop and the display  
will show the tuned station’s corresponding PTy information.  
NOTE  
To abort PTY search, press [RDS MODE] button..  
17  
OPERATION  
USING THE C 715 – TUNER MODE  
LISTENING TO DAB  
AUTO TUNE  
Until now, analogue radio signals such as FM or AM have been subject to  
numerous kinds of interference on their way from the transmitter to your  
radio. These problems were caused by mountains, high-rise buildings  
and weather conditions. With Digital Audio broadcast (DAb), you can now  
receive CD-like quality radio programs without any annoying interference  
and signal distortion. you get far more robust reception and virtually hiss  
or crackle free sound with DAb as long as you are within a good coverage  
area.  
For quick scanning of available broadcast services, you can scan new  
channels automatically by pressing SR 7’s [AUTo TUNE] key.  
Press and hold [AUTo TUNE] for more than 2 seconds to activate  
With DAb, the listener can scroll through a list of available stations - then  
instantly tune to the station of his choice. There is no need either to  
remember channel frequencies. All broadcasts are selected by simply  
selecting the service name.  
international search.  
CHANNEL LIST  
Follow the steps below to tune in and listen to the channels found by the  
C 715.  
ABOUT DAB ANTENNA  
1
Press [SoURCE] button repeatedly until FM/AM/DAb mode.  
Connect the supplied F-type DAb antenna to the DAb antenna input. The  
supplied antenna is for internal use only. Extend the lead. Fix it to the wall  
in a vertical direction. The strength of the incoming signal can be shown on  
the VFD by pressing the [TUNE MoDE/SElECT] button. The more segments  
are visible in the lower display line, the stronger the signal. by changing  
the position of the antenna, you can increase the signal strength. you can  
also opt for an external antenna. Consult an antenna professional for more  
information.  
2
3
Toggle [bAND] button to select DAb mode.  
Press [TUNE/TIME] button to scroll through the list of available channels.  
The upper display line of the VFD will display the current channel. The  
lower display line shows the next station.  
DAB OPERATION  
Follow the steps below to tune in to DAb broadcast.  
1
Press [SoURCE] button repeatedly until FM/AM/DAb mode.  
4
Press [TUNE MoDE/SElECT] to select the desired channel. The channel  
is tuned in and channel information is displayed.  
2
3
Toggle [bAND] button to select DAb mode. The C 715 will initialize. The  
VFD will show the following messages.  
After the initialization process, the C 715 will perform an automatic  
scan for available local broadcast services. This sequence cannot be  
interrupted. During the sequence, the following message will be visible  
on the VFD.  
NOTE  
It can occur that one of the channels in your list is temporarily not  
available. A “?” symbol will be visible in the front of the station name to  
indicate such station. If you select this channel, “No stations Available”  
will be displayed in the VFD.  
The arrows show the progress of the sequence. on the right top side,  
you will see how many digital stations have been found.  
After broadcast services are found, the channels are listed in  
alphanumeric order.  
4
If no broadcast services can be found, please check that the DAb  
antenna is connected correctly and if your area is covered by DAb.  
1ꢃ  
OPERATION  
USING THE C 715 – TUNER MODE  
SECONDARY SERVICE  
ACTIVE STATION  
Secondary service is a part-time program transmitted as a side channel of  
the primary station. Check broadcasting schedule if you want to listen to  
secondary stations.  
Active stations are listed at the top of the channel list. Those channels  
that are in list but have no service in the area will be displayed last in the  
channel list.  
PRESET  
This option takes your top ten Favorite channels and assigns them to preset  
numbers 1-10. This option is available only whenFav Stationoption is  
selected.  
When you listen to primary stations that include secondary services  
(stations), “SECoNDARyblinks in the VFD. When you listen to the secondary  
station, theSECoNDARyicon is illuminated in the VFD.  
PRESET TUNE  
Use this option to select a DAb preset station.  
1
While listening to a DAb broadcast, press [FUNCTIoN/FM MoDE].  
FUNCTION CONTROL  
In DAb mode, there are four system options for FUNCTIoN control namely  
Station order, Preset tune, DRC value and Manual tune.  
STATION ORDER  
Use station order to set the sequence in which the stations are listed. There  
2
Toggle [TUNE/TIME] untilPreset tuneis displayed in the lower line of  
the VFD.  
are three orders – Favorite Station, Alphanumeric and Active station.  
1
While listening to DAb broadcast, press [FUNCTIoN/FM MoDE].  
2
Toggle [TUNE/TIME] untilStation orderis shown in lower line of the  
VFD.  
3
4
Press [TUNE MoDE/SElECT]. The current tuned station is shown.  
Toggle [TUNE/TIME] until the desired preset station is displayed. “Preset  
_ _ Memoryis shown _ _is the preset number allocation while  
“Memoryindicates that there is a stored DAb station for the particular  
preset number. If there is no stored DAb station in a preset number,  
“Preset Emptywill be shown instead.  
5
Press [TUNE MoDE/SElECT].  
3
4
Press [TUNE MoDE/SElECT] – the current option is shown in the upper  
line of the VFD.  
DRC VALUE  
The level of compression of stations can be set to eliminate the differences  
in dynamic range or sound level between radio stations. Popular music  
would normally be more compressed than classical music, resulting in  
possible different audio levels when changing from one station to the  
other. Setting the DRC to0means no compression, “1/2indicates medium  
compression and1shows maximum compression. No compression is  
recommended, especially for classical music.  
Toggle [TUNE/TIME] until the desired option is shown in lower line of  
the VFD. Press [TUNE MoDE/SElECT].  
FAV STATION  
The C 715 memorizes the top ten stations you listen as you tune in stations.  
They will be listed at the top of the channel list. A favorite station in the  
channel list has a heart-shaped icon [ ] illuminated after the station name  
on the upper line of the VFD.  
1
While listening to a DAb broadcast, press [FUNCTIoN/FM MoDE].  
ALPHANUMERIC  
This is the default setting. Channels are listed by name with numbers first  
and then alphabetically by letters in the channel name.  
19  
OPERATION  
USING THE C 715 – TUNER MODE  
2
Toggle [TUNE/TIME] untilDRC valueis displayed in the lower line of  
INFORMATION SETTINGS  
the VFD. Press [TUNE MoDE/SElECT].  
While listening to a DAb broadcast, the type of information displayed in  
the lower line of the VFD can be varied. Toggle [INFo/RDS MoDE] to step  
through the following display options:  
DlS  
Program type  
Multiplex name  
Date and time  
bitrate mode  
3
4
Toggle [TUNE/TIME] until the desired DRC level is displayed.  
Channel and frequency  
Signal error rate  
Sw version  
Press [TUNE MoDE/SElECT].  
MANUAL TUNE  
This option allows you to manually tune in a channel and view a  
continuously updated display of the strength of the signal. you cal also use  
manual tuning to assist in positioning the antenna for best reception of a  
specific station.  
DLS  
Dynamic label Segment (DlS) is the scrolling text supplied by the  
broadcasting station. It may contain information on music titles or details  
regarding the program or station.  
1
While listening to a DAb broadcast, press [FUNCTIoN/FM MoDE].  
PROGRAM TYPE  
This is a description of the type of broadcast supplied by the station, such  
as Pop, Rock, Drama and the likes.  
MULTIPLEX NAME  
The name of the Multiplex that is broadcasting the program is displayed.  
2
Toggle [TUNE/TIME] untilManual tuneis displayed in the lower line of  
the VFD. Press [TUNE MoDE/SElECT].  
DATE AND TIME  
The current time and date as supplied by the DAb station are displayed  
– the time should always be accurate. The C 715’s clock will automatically  
adjust according to the time supplied by the DAb station.  
IMPORTANT NOTICE  
The C 715 clock will automatically adjust to the tuned DAB station’s  
supplied clock time data. If the DAB station time is incorrect, the C 715’s  
clock will also be inaccurately adjusted; the timer operation will also get  
affected as it will follow the adjusted but inaccurate time. To prevent  
the C 715 clock from automatically re-adjusting to a DAB station time,  
press and hold [RDS MODE] for at least 3 seconds - “DAB time off” will  
be shown in the VFD. To automatically synchronize the C 715’s clock to a  
DAB station time, press and hold [RDS MODE] button again for at least 3  
seconds - “DAB time on” will be shown in the VFD.  
3
4
Toggle [TUNE/TIME] until the desired channel is displayed.  
Press [TUNE MoDE/SElECT].The signal strength indicator is displayed.  
While viewing the indicator, adjust or reposition the DAb antenna until  
the best reception is indicated.  
5
Press [TUNE MoDE/SElECT] to cancel Manual tune and resume normal  
reception.  
BITRATE MODE  
This displays the bitrate of the currently tuned DAb broadcast.  
CHANNEL AND FREQUENCY  
The channel and frequency of the currently tuned DAb broadcast are  
displayed.  
SIGNAL ERROR RATE  
This displays the digital error rate (0 to 99) of the currently tuned channel  
- the lower the figure, the better the quality of the received broadcast.  
SW VERSION (SOFTWARE VERSION)  
The version number of the installed software is displayed.  
ꢀ0  
OPERATION  
USING THE C 715 – EXTERNAL SOURCES AND TIMER  
LISTENING TO EXTERNAL SOURCES  
SETTING THE ON/OFF TIMER  
Adjust the clock before setting the timer.  
When appropriately connected to the applicable C 715 input, one can listen  
to external sources such as a VCR, Media Player (MP), Tape Recorder and  
other auxiliary components.  
1
Toggle [TIME MoDE] untilon timeis displayed in the VFD. Aton time”  
mode, “hourvalue blinks.  
Toggle the [SoURCE] button to select [TAPE], [VIDEo], [AUX] or [MP] mode.  
Refer to the above sections aboutIdentification of Controls – Front Panel”  
andIdentification of Controls – Rear Panelfor additional information on  
these external sources.  
2
Toggle [TUNE/TIME] to set the desiredhoursetting. Press [TUNE  
MoDE/SElECT].  
SETTING THE CLOCK  
1
Press the [TIME MoDE] button. Toggle [TIME MoDE] to step through  
the following modes:  
Current time on time  
Source Select off time  
3
4
“Minutevalue blinks. Press [TUNE/TIME] to set the desiredminute”  
setting. Press [TUNE MoDE/ SElECT].  
off timeappears on the VFD andhourvalue blinks. Repeat steps 2  
and 3 above to set desiredoff time.  
2
AtCurrent timemode, toggle [TUNE /TIME] to set the current hour  
hourvalue blinks. Press [TUNE MoDE/SElECT].  
5
6
Press [TUNE/TIME] to select the SoURCE where these timer settings will  
be applied.  
Press [TUNE MoDE/SElECT]. Timer settings are now stored in the  
memory.  
3
“Minutevalue blinks. Press [TUNE/TIME] to set the current minute. Press  
[TUNE MoDE/SElECT]. The clock starts from00seconds.  
NOTES  
The C 715 uses the 24 hour “military” clock.  
When no action is taken for 1 minute, the time adjust mode is cancelled.  
To cancel time mode setting, press [STOP].  
ꢀ1  
OPERATION  
USING THE C 715 – EXTERNAL SOURCES AND TIMER  
ACTIVATE TIMER OPERATION  
When pressed, the TIMER button in the SR 7 remote control will activate  
several timer modes. Toggle [TIMER] to step through the following modes:  
TIMER RECORDING  
you can set up the C 715 to record a program via an external USb device at  
a desired time. Make sure to connect the external USb device into the front  
panel’s USb input beforehand.  
Timer off Timer daily  
Timer REC daily Timer REC once  
1
After setting upon timeandoff timevalues, toggle [TIMER] button  
untilTimer REC onceorTimer REC dailyappears. Timer indicator and  
“RECoRDwill illuminate in the VFD.  
TIMER DAILY  
1
After setting upon timeandoff timevalues, toggle [TIMER] button  
untilTimer Dailyappears. A timer indicator (redclock faceicon) will  
illuminate in the VFD.  
2
3
Prepare for the timer recording by tuning to the desired station.  
Turn oFF the C 715 by pressing the PoWER button.  
NOTE  
When timer is activated and the C 715 at standby mode, the indicator  
2
3
Prepare for the timer playback by adjusting the volume, tune in to a  
station, load a disc and other applicable setup conditions.  
Turn oFF the C 715 by pressing the PoWER button.  
above the POWER button interchangeably blinks from amber to blue.  
One minute before the preset “On time” is reached, the C 715 will turn  
ON and then starts recording when the “On time” is reached. When the  
“Off time” is reached, the C 715 will return to standby.  
NOTE  
When timer is activated and the C 715 at standby mode, the indicator  
above the POWER button interchangeably blinks from amber to blue.  
Everyday when the preset “On time” is reached, the C 715 will turn ON.  
When the “Off time” is reached, the C 715 will return to standby.  
TIMER OFF  
Toggle [TIMER] to selectTimer off”if you do not want to activate timer  
operations. The timer indicator will be extinguished from the VFD.  
ꢀꢀ  
OPERATION  
USING THE C 715 – OTHER FEATURES  
TONE/BALANCE/DIMMER  
OTHER SR 7 FEATURES  
Toggle this button to adjust tone, balance and dimmer settings in  
combination with [VolUME] knob. Toggle [ToNE/bAl/DIMMER] to step  
through the following modes:  
Most of the buttons on the remote control handset have the same effect as  
the corresponding buttons on the front panel of the C 715. In addition, the  
handset is equipped with some extra buttons like the following function  
keys.  
bASS TREblE bAlANCE DIMMER  
NUMERIC KEY PAD  
Using the direct-entry numeric keypad (0 to 9) causes the C 715 to jump  
directly to the beginning of a numbered track and commence play. Thus, to  
play Track 5, simply press5. To play Track 20, press2and0.  
Select the feature you want to adjust and within 3 seconds, turn [VolUME]  
clockwise or counterclockwise to change the level settings.  
TONE CONTROLS – TREBLE AND BASS  
Treble and bass controls only affect the low bass and high treble leaving  
the critical midrange frequencies free of coloration.  
These controls allow one to tweak on-the-fly, the frequency response of the  
source during playback.  
REPEAT  
Maximum and minimum values for both Tone Control levels are +/- 10 db.  
BALANCE  
The bAlANCE control adjusts the relative levels of the left and right  
speakers. ThebAlANCE CENTERposition provides equal level to the left  
and right channels. Rotating the control clockwise moves the balance  
towards the right. Rotating the control anti-clockwise moves the balance  
to the left.  
To repeat the playback of a particular track or file, press the SR 7’s [REPEAT]  
key once. Toggle the [REPEAT] key to repeat all the tracks, files, folders or  
until repeat mode is turned oFF.  
DIMMER  
Toggle to either reduce or restore normal VFD brightness.  
Repeat 1 RPT Folder (USb, MP3/WMA disc)  
Play (Repeat o) Repeat All  
REPEAT A-B  
To repeat a sequence, implement the following procedures:  
1
2
3
Press [RPT A-b] at your chosen starting point RPT A-bis shown in the  
VFD. “bis blinking as it awaits the end point of the repeat sequence.  
Press [RPT A-b] again at your chosen end point. The repeat sequence  
begins.  
Press [RPT A-b] again to cancel the sequence.  
ꢀꢁ  
OPERATION  
USING THE C 715 – OTHER FEATURES  
RANDOM PLAY  
MUTE  
Press [RANDoM] key during playback or stop mode. “Random Playis shown  
in the VFD. Playback of the first randomly selected track or file automatically  
begins. Press [RANDoM] again to return to normal playback.  
Use the [Mute] key to silence all channels completely. Muting is always  
available regardless of the source selections.  
Adjusting the VolUME via the SR 7 or the front-panel knob automatically  
releases the mute function. Pressing [MUTE] again will also resume the  
current volume level.  
TIME  
SLEEP  
During playback mode, toggle [TIME] button to alternatively display the  
elapsed time or remaining time of the current track/file.  
TEXT  
The Sleep Mode timer will switch the C 715 to Standby mode automatically  
after a preset number of minutes.  
1
Toggle the SR 7’s [SlEEP] button to select desired Sleep time - each  
press decreases the sleep time in 10-minute increments from 90 to 10  
minutes.  
2
To cancel the sleep mode, continue pressing SR 7’s [SlEEP] button until  
“Sleepdisplay is turned oFF in the VFD.  
During MP3/WMA playback mode, toggle [TEXT] to display information (if  
available) about the current file.  
NOTES  
The VFD is dimmed when you set the Sleep timer.  
To check remaining sleep time, press [SLEEP] once – the remaining time  
will be displayed for 3 seconds and then return to normal display.  
DEFAULT DISPLAY (SCROLLING)  
Song Title Artist Name Album Name  
INFORMATION DISPLAY  
Default display (scrolling)  
Track Number  
File Name  
Song Title  
Artist Name  
Album Name  
year  
Comment  
ꢀꢂ  
REFERENCE  
TROUBLESHOOTING  
CONDITION  
POSSIBLE CAUSES  
POSSIBLE SOLUTIONS  
No power.  
No sound.  
The power cord is disconnected.  
Plug the power cord into the wall outlet  
securely.  
Power AC lead unplugged or power not  
switched on.  
Check if AC lead is plugged in and power  
switched on.  
Mute on.  
Switch off Mute.  
headphones inserted.  
Unplug the headphones.  
Center balance control.  
Check connections and speakers.  
No sound one channel.  
balance not centered.  
Speaker not properly connected or damaged.  
Speakers wired out-of-phase.  
Weak bass/diffused stereo image.  
The C 715 does not start playback.  
Check connections to all speakers in the  
system.  
No disc is inserted.  
Insert a disc.  
The disc is loaded upside down.  
The disc is too dirty.  
Reload the disc with the label side UP.  
Clean the disc.  
For external USb source, no WMA/MP3 files  
loaded.  
Check if there are MP3/WMA files loaded in  
the external USb device.  
Disc playback sound inadvertently skips.  
The C 715 is subject to vibration or physical  
shock from external sources.  
Change the installation location.  
Disc has too many scratches or has some  
unwarranted imperfections/deformation.  
Replace disc.  
Noisy reception, hiss.  
Weak signal.  
Check station tuning. Adjust or replace  
antenna.  
Reception with whistling, buzzing noise.  
Interference from other computers, games  
consoles.  
Check station tuning. Switch off or move the  
source of electrical noise.  
C 715 does not respond to SR 7 remote  
control.  
batteries are flat or incorrectly inserted.  
Check batteries.  
IR transmitter window on remote or IR receiver  
window on C 715 is obstructed.  
Check IR windows and ensure clear line-of-  
sight from remote to C 715.  
C 715 front panel is in very bright sunlight or  
ambient light.  
Reduce sunlight/room lighting.  
NOTES ON DISCS  
HANDLING DISCS  
CLEANING DISCS  
Do not touch the playback side of the disc. hold the disc by the edges so that  
fingerprints do not get on the surface. Never stick paper or tape on the disc.  
Fingerprints and dust on the disc can cause poor picture quality and sound  
distortion. before playing, clean the disc with a clean cloth. Wipe the disc  
from the center out.  
STORING DISCS  
After playing, store the disc in its case. Do not expose the disc to direct  
sunlight or sources of heat and never leave it in a parked car exposed to  
direct sunlight.  
Do not use strong solvents such as alcohol, benzine, thinner, commercially  
available cleaners, or anti-static spray intended for older vinyl records.  
ꢀ5  
REFERENCE  
SPECIFICATIONS  
AMPLIFIER SECTION  
Power output Stereo Mode  
IhF dynamic power (6 ohms)  
Total harmonic distortion at rated power  
Damping factor (6 ohms)  
25W (6 ohms within rated distortion, 1khz)  
28W  
0.15%  
>102  
Input sensitivity and impedance (Tape IN)  
Frequency response  
370mV/27kΩ  
+1 db/-3db (Ref. 1 khz, 10hz – 80khz)  
95db (Ref. rated power/ 6 ohms A-WTD)  
80db (Ref. 1W / 6 ohms A-WTD)  
Signal/noise ratio,  
Signal/noise ratio  
TUNER SECTION  
AM SECTION  
Tuning range  
520khz -1710khz (North America version, 10khz steps)  
522khz -1629khz (Europe version, 9khz steps)  
Usable sensitivity  
S/N ratio  
60dbuV  
40db  
Total harmonic Distortion  
Selectivity  
1.5%  
25db  
Frequency response  
-6db (Ref. 400hz, 80hz – 2.2khz)  
FM SECTION  
Tuning range  
Usable sensitivity, MoNo  
S/N Ratio MoNo  
87.50Mhz – 108Mhz (50khz steps)  
10dbuV  
60db  
S/N Ratio STEREo  
55db  
Total harmonic Distortion, MoNo  
Total harmonic Distortion, STEREo  
Frequency response  
0.3%  
0.5%  
-3db (Ref. 1 khz, 30hz – 12khz)  
Channel Separation  
35db  
RDS decode sensitivity  
29dbuV  
DAB SECTION  
Tuning range  
Maximum signal  
band III 174Mhz – 240Mhz  
-3dbm  
Sensitivity  
-96dbm  
Adjacent Channel Rejection  
Audio output Stereo  
optical S/PDIF  
-35db  
2.5Vp-p  
24 bit sample resolution  
48khz sample rate  
CD SECTION  
output level  
Frequency response (ref. 0db 1khz, 20hz-20khz)  
Total harmonic distortion (ref. 1khz, VIDEo oUT)  
1.16V  
+1db  
0.04%  
Signal/Noise ratio (A-weighted, ref. 1khz VIDEo oUT)  
Channel balance (ref. 0db 1khz)  
100db  
0.5db  
Dynamic range (A-WTD, VIDEo oUT)  
Channel separation  
82db  
78db (1khz)  
78db (10khz)  
PHYSICAL SPECIFICATIONS  
Dimensions (W x h x D)  
213 x 103 x 324 mm (Net)  
213 x 116 x 362 mm (Gross)  
Net weight  
Shipping weight  
4.5kg  
6.0kg  
Note: Gross dimensions include feet, extended buttons and rear panel terminals.  
information about C 715 DAb.  
ꢀ6  
REFERENCE  
NOTES  
ꢀ7  
©2007 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 715 DAb Manual 09/07  

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