background image
C 372
Stereo Integrated Amplifier
ENGLISH
FRANÇAIS
DEUTSCH
NEDERLANDS
ESP
AÑOL
IT
ALIANO
POR
TUGUÊS
SVENSKA
Owner's Manual
Manuel d'Installation
Bedienungsanleitung
Gebruikershandleiding
Manual del Usuario
Manuale delle Istruzioni
Manual do Proprietário
Bruksanvisning
®


background image
Warning: To reduce the risk of fire or electric shock, do not
expose this unit to rain or moisture.
The lightning flash with an 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 product.
Do not place this unit on an unstable cart, stand or tripod, bracket
or table. The unit may fall, causing serious injury to a child or adult
and serious damage to the unit. Use only with a cart, stand, tripod,
bracket or table recommended by the manufacturer or sold with
the unit. Any mounting of the device on a wall or ceiling should
follow the manufacturer's instructions and should use a mounting
accessory recommended by the manufacturer.
An appliance and cart combination should be moved with care.
Quick stops, excessive force and uneven surfaces may cause the
appliance and cart combination to overturn.
Read and follow all the safety and operating instructions before
connecting or using this unit. Retain this notice and the owner's
manual for future reference.
All warnings on the unit and in its operating instructions should be
adhered to.
Do not use this unit near water; for example, near a bath tub,
washbowl, kitchen sink, laundry tub, in a wet basement or near a
swimming pool.
The unit should be installed so that its location or position does not
interfere with its proper ventilation. For example, it should not be
situated on a bed, sofa, rug or similar surface that may block the
ventilation openings; or placed in a built-in installation, such as a
bookcase or cabinet, that may impede the flow of air through its
ventilation openings.
The unit should be situated from heat sources such as radiators,
heat registers, stoves or other devices (including amplifiers) that
produce heat.
The unit should be connected to a power supply outlet only of the
voltage and frequency marked on its rear panel.
The power supply cord should be routed so that it is not likely to be
walked on or pinched, especially near the plug, convenience
receptacles, or where the cord exits from the unit.
Unplug the unit from the wall outlet before cleaning. Never use
benzine, thinner or other solvents for cleaning. Use only a soft
damp cloth.
The power supply cord of the unit should be unplugged from the
wall outlet when it is to be unused for a long period of time.
Care should be taken so that objects do not fall, and liquids are not
spilled into the enclosure through any openings.
This unit should be serviced by qualified service personnel when:
A. The power cord or the plug has been damaged; or
B. Objects have fallen, or liquid has been spilled into the unit; or
C. The unit has been exposed to rain or liquids of any kind; or
D. The unit does not appear to operate normally or exhibits a
marked change in performance; or
E. The device has been dropped or the enclosure damaged.
DO NOT ATTEMPT SERVICING OF THIS UNIT
YOURSELF. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL
Upon completion of any servicing or repairs, request the service
shop's assurance that only Factory Authorized Replacement Parts
with the same characteristics as the original parts have been used,
and that the routine safety checks have been performed to
guarantee that the equipment is in safe operating condition.
REPLACEMENT WITH UNAUTHORIZED PARTS MAY RESULT IN FIRE,
ELECTRIC SHOCK OR OTHER HAZARDS.
ATTENTION
POUR ÉVITER LES CHOC ELECTRIQUES, INTRODUIRE LA
LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE
CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU'AU
FOND.
CAUTION
TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF
PLUG TO WIDE SLOT FULLY INSERT.
If an indoor antenna is used (either built into the set or installed
separately), never allow any part of the antenna to touch the metal
parts of other electrical appliances such as a lamp, TV set etc.
CAUTION
POWER LINES
Any outdoor antenna must be located away from all power lines.
OUTDOOR ANTENNA GROUNDING
If an outside antenna is connected to your tuner or tuner-
preamplifier, be sure the antenna system is grounded so as to
provide some protection against voltage surges and built-up static
charges. Article 810 of the National Electrical Code, ANSI/NFPA No.
70-1984, provides information with respect to proper grounding of
the mast and supporting structure, grounding of the lead-in wire to
an antenna discharge unit, size of grounding conductors, location of
antenna discharge unit, connection to grounding electrodes and
requirements for the grounding electrode.
a. Use No. 10 AWG (5.3mm2) copper, No. 8 AWG (8.4mm2)
aluminium, No. 17 AWG (1.0mm2) copper-clad steel or bronze
wire, or larger, as a ground wire.
b. Secure antenna lead-in and ground wires to house with stand-off
insulators spaced from 4-6 feet (1.22 - 1.83 m) apart.
c. Mount antenna discharge unit as close as possible to where lead-
in enters house.
d. Use jumper wire not smaller than No.6 AWG (13.3mm2) copper,
or the equivalent, when a separate antenna-grounding electrode
is used. see NEC Section 810-21 (j).
EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL ELECTRICAL
CODE INSTRUCTIONS CONTAINED IN ARTICLE 810 - RADIO AND
TELEVISION EQUIPMENT.
NOTE TO CATV SYSTEM INSTALLER: This reminder is provided to
call the CATV system installer's attention to Article 820-40 of the
National Electrical Code that provides guidelines for proper
grounding and, in particular, specifies that the ground cable ground
shall be connected to the grounding system of the building, as close
to the point of cable entry as practical.
CAUTION
RISK OF ELECTRIC
SHOCK DO NOT OPEN
ATTENTION:
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE COVER (OR BACK). NO
USER SERVICEABLE PARTS INSIDE. REFER SERVICING
TO QUALIFIED SERVICE PERSONNEL.
IMPORTANT SAFETY INSTRUCTIONS
2


background image
3
FRONT PANEL CONTROLS
REAR PANEL CONNECTIONS
North American


background image
ENGLISH
FRANÇAIS
DEUTSCH
ESP
AÑOL
IT
ALIANO
POR
TUGUÊS
SVENSKA
4
QUICK START
1 Connect the speakers to the Speaker A terminals and sources to the
relevant rear input sockets.
2 Plug in the AC power cord.
3 Press the POWER button to turn the NAD C 372 on.
4 Press the required input selector.
NOTES ON INSTALLATION
Your NAD C 372 should be placed on a firm, level surface. Avoid placing
the unit in direct sunlight or near sources of heat and dampness. Allow
adequate ventilation. Do not place the unit on a soft surface like a
carpet. Do not place unit 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.
The RCA sockets on your NAD C 372 are colour coded for convenience.
Red and white are Right and Left audio respectively, and yellow for NAD
Link. 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 in.
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.
Should water get into your NAD C 372, shut off the power to the unit
and remove the plug from the AC socket. Have the unit inspected by a
qualified service technician before attempting to use it again. Do not
remove the cover, there are no user-serviceable 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.
REAR PANEL CONNECTIONS (FIGURE 1)
1. DISC INPUT
Input for additional line level input signals such as CD, Mini Disc player
or the output signal from a step-up amplifier for a turntable. Use a twin
RCA-to-RCA lead to connect the auxiliary unit's left and right 'Audio
Outputs' to this input.
2. 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 C 372 only accepts analogue signals from your CD
player.
3. 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 Out' of the unit to these inputs.
Note: These are audio inputs only.
4. 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.
5. TUNER INPUT
Input for a Tuner or other line-level signal source. Use a twin RCA-to-RCA
lead to connect the Tuner left and right 'Audio Outputs' to this input.
6. TAPE 2 IN, OUT
Connections for analogue recording and playback to 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 2 IN sockets
for playback. Connect the left and right 'Audio Input' of the tape
machine to the TAPE 2 OUT sockets for recording.
7. TAPE 1 IN, OUT
Connections for analogue recording and playback to a secondary 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 and tape monitoring. Connect the left and right
'Audio Input' of the tape machine to the TAPE 1 OUT sockets for
recording.
8. PRE OUT 1
In normal use the PRE OUT 1 is connected to the Main-In sockets
(No. 9) with the links supplied. The NAD C 372 allows for the
connection of multiple power amplifiers. If you are using a single,
external stereo power amplifier, disconnect the links to the Main-In
sockets. The C 372's internal power amplifier is now disconnected.
Use a twin RCA-to-RCA lead to connect to the left and right 'Audio
Input' of the Power amp to the PRE OUT 1 sockets.
NOTES: Always turn the C 372 and associated external power
amplifiers off before connecting or disconnecting anything to the PRE-
OUT 1, 2 and MAIN-IN sockets. The PRE-OUT 1&2 output signals will be
affected by the NAD C 372's volume and tone control settings.
9. MAIN IN
Connections to an external pre-amplifier or processor, such as a
surround-sound decoder. In normal use these are connected to the Pre-
Out 1 sockets (No. 8) with the links supplied. To connect your NAD
C 372 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.
NOTES: Always turn the C 372 and associated external power
amplifiers off before connecting or disconnecting anything to the PRE-
OUT 1, 2 and MAIN-IN sockets.
The PRE-OUT 1&2 output signals will be affected by the NAD C 372's
volume and tone control settings.
10. PRE OUT 2
The PRE OUT 2 sockets can be used to drive an additional power
amplifier. The VOLUME Pre-Out 2 control (No. 11) can be used to reduce
the output level of the pre-amplifier to the power amplifier by up to -
12dB. With the VOLUME Pre-Out 2 control set to the maximum position
(at the 0dB position), the output level will be identical to that of the PRE
OUT 1 sockets.


background image
ENGLISH
FRANÇAIS
DEUTSCH
ESP
AÑOL
IT
ALIANO
POR
TUGUÊS
SVENSKA
5
If you are using a pair of power amplifiers specifically for Bi-Amping,
use the PRE OUT 2 sockets to connect the power amplifier with the
highest gain of the pair. By adjusting the VOLUME PRE OUT 2 control
(No. 11) the volume level can be matched exactly to that of the power
amplifier connected to the PRE OUT 1 sockets. Refer also to chapter
"Bi-Amping" for more information. Use a twin RCA-to-RCA lead to
connect to the left and right 'Audio Input' of the Power amp to the PRE
OUT 1 & 2 sockets.
NOTES: Always turn the C 372 and associated external power
amplifiers off before connecting or disconnecting anything to the PRE-
OUT 1, 2 and MAIN-IN sockets.
The PRE-OUT 1&2 output signals will be affected by the NAD C 372's
volume and tone control settings.
11. VOLUME PRE OUT 2
The VOLUME Pre-Out 2 control allows for adjustment of the output
level of the PRE OUT 2 sockets. The output level can be reduced from
0dB to -12dB; when set to the maximum position (at the 0dB position),
the output level will be identical to that of the PRE OUT 1 sockets. Refer
also to chapter "Bi-Amping" for more information.
NOTES: Always turn the C 372 and associated external power
amplifiers off before connecting or disconnecting anything to the PRE-
OUT 1, 2 and MAIN-IN sockets.
The PRE-OUT 1&2 output signals will be affected by the NAD C 372's
volume and tone control settings.
12. BRIDGE MODE
The NAD C 372 can be used as part of a higher power stereo or home-
theatre system, by connecting adding additional power amplifiers. If the
power amp section in the NAD C 372 is to be used to drive a single
speaker, then use the Bridge switch to run the built-in Left and Right
power amplifiers as a single channel, high power unit. Set the BRIDGE
MODE switch to the 'Bridge' position and connect the speaker to the
terminals marked 'L +' and 'R+' ensuring that the 'L+' is connected to the
'+' terminal on your loudspeaker and the 'R+' is connected to the
loudspeaker's '-' terminal. Connect the source to the Left MAIN-IN input.
In Bridged Mode the NAD C 372 will produce approximately 300W into
an 8 ohm loudspeaker. In this mode, the amplifier sections will react as
though the speaker impedance has been halved. Low impedance
speakers (under 8 ohms) are not recommended when using Bridge
Mode, as these may cause the amplifier's thermal cut-out to operate if
played at high levels.
The Bridge LED on the front panel (Fig. 2; No. 2) will illuminate when
the amplifier is in Bridge mode.
NOTES: Do not connect anything to the Right MAIN-IN input (No. 9)
when Bridge Mode is selected. Always turn the C 372 and associated
external power amplifiers off before connecting or disconnecting
anything to the PRE-OUT 1, 2 and MAIN-IN sockets.
13. SOFT CLIPPINGTM
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 it was not
designed to reproduce. The NAD Soft ClippingTM circuit gently limits the
output of the system to minimise audible distortion if the amplifier is
overdriven.
If your listening involves moderate power levels you may leave the Soft
ClippingTM 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.
The Soft ClippingTM indicator on the front panel will illuminate when the
amplifier is in Soft Clipping mode.
14. IR IN, OUT
The IR IN/OUT connector is used to pass commands from other units
fitted with IR IN/OUT connectors. This allows centralized control of a
complete system, and also allows some of the basic functions of other
NAD components (such as a tuner, CD player or cassette-deck) also
equipped with IR IN/OUT to be controlled with the amplifier's remote
control. To function with such other units, connect the C 372's IR OUT
to the IR IN on the other unit. The IR connectors can be daisy-chained,
IN to OUT, so that a whole system can be controlled from the remote
control facilities of one unit.
NOTES: It is advisable not to connect IR IN/OUT if these units that have
their own built-in remote control command receiver and are positioned
together, in direct view from the remote control handset. If you are
unsure, try operating the products without IR IN/OUT first; If the unit
responds to the remote control command, it will not be necessary to
connect IR IN/OUT. Never loop the last unit back to the first NAD unit in
the IR IN/OUT chain. Unplug all units from the mains before connecting
or disconnecting IR IN/OUT.
15. 12V TRIGGER OUT
This output allows to remotely switch on or off ancillary equipment such
as a tuner, power amplifier, etc. which are also equipped with a 12V
trigger input. This can also be an AC outlet power strip equipped with
a 12V trigger input. The 12V trigger output is activated whenever the
unit is switched to normal operational mode from Stand-by or Off.
For switching Stand-by/Power On of an external component through
the C 372, connect the12V-trigger output of the C 372 to the remote
component's DC input jack. The plug required is a standard 3.5mm
Mini-Jack plug ("mono"): The tip is the live or + connection, the shaft
of the input jack is the 12V-trigger - or ground connection.
NOTES: Check the specifications of the Trigger input terminal on the
other components to ensure these are compatible with the C 372's 12V-
trigger output. NAD components equipped with 12V input triggers are
fully compatible with the C 372's 12V output trigger. The C 372's 12V-
trigger output voltage is 12V DC. The total maximum current must not
exceed 200mA. Typically, NAD 12V input triggers draw less than 10mA
of current.
Before making any connections to any 12V trigger input or output,
make sure all components are disconnected from the AC mains.
Failure to observe the above may result in damage to the C 372 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.
16. SPEAKERS A + SPEAKERS B
The NAD C 372 is equipped with two sets of speaker connectors. Use
the Speakers A connectors for the 'main' speakers and use the Speakers
B connectors for a second pair, for example, extension speakers located
in another room.