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®
M2
Direct Digital Amplier
ENGLISHFRANÇAISESPAÑOLITALIANODEUTSCHNEDERLANDSSVENSKAРУССКИЙ
Owner’s Manual
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ENGLISH FRANÇAIS ESPAÑOL ITALIANO DEUTSCH NEDERLANDS SVENSKA РУССКИЙ
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS FOR LATER USE.
FOLLOW ALL WARNINGS AND INSTRUCTIONS MARKED ON THE
AUDIO EQUIPMENT.
1 Read instructions - All the safety and operating instructions should be
read before the product is operated.
2 Retain instructions - The safety and operating instructions should be
retained for future reference.
3 Heed Warnings - All warnings on the product and in the operating
instructions should be adhered to.
4 Follow Instructions - All operating and use instructions should be
followed.
5 Cleaning - Unplug this product from the wall outlet before cleaning.
Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for
cleaning.
6 Attachments - Do not use attachments not recommended by the
product manufacturer as they may cause hazards.
7 Water and Moisture - Do not use this product near water-for example,
near a bath tub, wash bowl, kitchen sink, or laundry tub; in a wet
basement; or near a swimming pool; and the like.
8 Accessories - Do not place this product on an unstable cart, stand,
tripod, bracket, or table. The product may fall, causing serious injury to
a child or adult, and serious damage to the product. Use only with a
cart, stand, tripod, bracket, or table recommended by the manufacturer,
or sold with the product. Any mounting of the product should follow
the manufacturer’s instructions, and should use a mounting accessory
recommended by the manufacturer.
9 A product and cart combination should be moved with
care. Quick stops, excessive force, and uneven surfaces may
cause the product and cart combination to overturn.
10 Ventilation - Slots and openings in the cabinet are provided for
ventilation and to ensure reliable operation of the product and to
protect it from overheating, and these openings must not be blocked
or covered. The openings should never be blocked by placing the
product on a bed, sofa, rug, or other similar surface. This product should
not be placed in a built-in installation such as a bookcase or rack unless
proper ventilation is provided or the manufacturer’s instructions have
been adhered to.
11 Power Sources - This product should be operated only from the type
of power source indicated on the marking label. If you are not sure of
the type of power supply to your home, consult your product dealer or
local power company.
The primary method of isolating the amplier from the mains supply
is to disconnect the mains plug. Ensure that the mains plug remains
accessible at all times. Unplug the AC power cord from the AC outlet if
the unit will not be used for several months or more.
12 Grounding or Polarization - This product may be equipped with a
polarized alternating-current line plug (a plug having one blade wider
than the other). This plug will t into the power outlet only one way.
This is a safety feature. If you are unable to insert the plug fully into the
outlet, try reversing the plug. If the plug should still fail to t, contact
your electrician to replace your obsolete outlet. Do not defeat the safety
purpose of the polarized plug.
13 Power - Cord Protection - Power-supply cords should be routed so that
they are not likely to be walked on or pinched by items placed upon or
against them, paying particular attention to cords at plugs, convenience
receptacles, and the point where they exit from the product.
14 Outdoor Antenna Grounding - If an outside antenna or cable system
is connected to the product, be sure the antenna or cable 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 70, provides information with regard 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.
NOTE TO CATV SYSTEM INSTALLER
This reminder is provided to call the CAT V system installer’s attention to Section
820-40 of the NEC which provides guidelines for proper grounding and, in
particular, species that the cable ground shall be connected to the grounding
system of the building, as close to the point of cable entry as practical.
15 Lightning - For added protection for this product during a lightning
storm, or when it is left unattended and unused for long periods of
time, unplug it from the wall outlet and disconnect the antenna or
cable system. This will prevent damage to the product due to lightning
and power-line surges.
16 Power Lines - An outside antenna system should not be located in the
vicinity of overhead power lines or other electric light or power circuits,
or where it can fall into such power lines or circuits. When installing an
outside antenna system, extreme care should be taken to keep from
touching such power lines or circuits as contact with them might be
fatal.
17 Overloading - Do not overload wall outlets, extension cords, or
integral convenience receptacles as this can result in a risk of re or
electric shock.
18 Object and Liquid Entry - Never push objects of any kind into this
product through openings as they may touch dangerous voltage points
or short-out parts that could result in a re or electric shock. Never spill
liquid of any kind on the product.
WARNING: THE APPARATUS SHOULD NOT BE EXPOSED TO
DRIPPING OR SPLASHING, AND OBJECTS FILLED WITH LIQUIDS,
SUCH AS VASES, SHOULD NOT BE PLACED ON THE APPARATUS.
AS WITH ANY ELECTRONIC PRODUCTS, USE CARE NOT TO SPILL
LIQUIDS INTO ANY PART OF THE SYSTEM. LIQUIDS CAN CAUSE A
FAILURE AND/OR A FIRE HAZARD.
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IMPORTANT SAFETY INSTRUCTIONS
19 Damage Requiring Service - Unplug this product from the wall outlet
and refer servicing to qualied 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
qualied 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.
23 Heat - The product should be situated away from heat sources such as
radiators, heat registers, stoves or other products (including ampliers)
that produce heat.
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
PRODUCT TO RAIN OR MOISTURE.
CAUTION
TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT,
FULLY INSERT.
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 MAYBE 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.
The equipment draws its nominal non-operational power from the AC
outlet with its POWER switch at the ON position.
The socket-outlet shall be installed near the apparatus and shall be easily
accessible.
CAUTION
Changes or modications to this equipment not expressly approved by
NAD Electronics for compliance could void the user’s authority to operate
this equipment.
CAUTION REGARDING PLACEMENT
To maintain proper ventilation, be sure to leave a space around the unit
(from the largest outer dimensions including projections) that is equal to or
greater than shown below.
Left and Right Panels: 10 cm
Rear Panel: 10 cm
Top Panel: 50 cm
ENGLISHFRANÇAISESPAÑOLITALIANODEUTSCHNEDERLANDSSVENSKAРУССКИЙ
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ENGLISH FRANÇAIS ESPAÑOL ITALIANO DEUTSCH NEDERLANDS SVENSKA РУССКИЙ
IMPORTANT SAFETY INSTRUCTIONS
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 oce can advise you of the
responsible waste disposal point.
INFORMATION ABOUT COLLECTION AND DISPOSAL OF
WASTE BATTERIES DIRECTIVE 2006/66/EC OF THE EUROPEAN
PARLIAMENT AND THE COUNCIL OF EUROPEAN UNION FOR
EUROPEAN CUSTOMERS ONLY
Batteries bearing any of these symbols indicate
that they should be treated as “separate collection”
and not as municipal waste. It is encouraged that
necessary measures are implemented to maximize
the separate collection of waste batteries and
to minimize the disposal of batteries as mixed
municipal waste.
End-users are exhorted not to dispose waste
batteries as unsorted municipal waste. In order to
achieve a high level of recycling waste batteries, discard waste batteries
separately and properly through an accessible collection point in your
vicinity. For more information about collection and recycling of waste
batteries, please contact your local municipality, your waste disposal service
or the point of sale where you purchased the items.
By ensuring compliance and conformance to proper disposal of waste
batteries, potential hazardous eects on human health is prevented and
the negative impact of batteries and waste batteries on the environment
is minimized, thus contributing to the protection, preservation and quality
improvement of the environment.
RECORD YOUR MODEL NUMBER NOW, WHILE YOU CAN SEE IT
The model and serial number of your new M2 are located on the back of
the cabinet. For your future convenience, we suggest that you record these
numbers here:
Model no: ......................................
Serial no.: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NAD is a trademark of NAD Electronics International, a division of Lenbrook Industries Limited
Copyright 2012, NAD Electronics International, a division of Lenbrook Industries Limited
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INTRODUCTION
GETTING STARTED
QUICK START
In case you simply cannot wait to experience the performance of your new
NAD M2 Direct Digital Amplier, we provide the following QUICKSTART
instructions to get you underway.
Please make all the connections to your M2 with the unit unplugged
from the AC outlet. It is also advisable to power-down or unplug all
associated components while making or breaking any signal or AC power
connections.
1 Connect your speakers to the LEFT and RIGHT speaker terminals and
input sources to the applicable M2 rear panel input sockets.
WARNING
The M2 employs a “oating” ground design. External devices (such as
speaker switching or headphone adaptors) that connect the left and
right channels together must not be used with the M2. Left and right
channels must never be connected to each other.
2 Make sure that the OFF/AUTO trigger switch at the M2 rear panel is set
to OFF. Connect the AC cord to M2’s AC Mains input and then plug into
an AC outlet.
WARNING
For optimal performance, the M2 requires a grounded AC receptacle or a
separate earth ground. Ensure the proper grounding of your system.
SAVE THE PACKAGING
Please save the box and all of the packaging in which your M2 arrived.
Should you move or otherwise need to transport your M2, 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!
NOTES ON INSTALLATION
Your NAD M2 should be placed on a rm, 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-ow through the ventilation slots. Make sure the unit is
switched o before making any connections.
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 rmly pushed home. For best performance, use quality speaker leads of
16 gauge (1.5mm) thickness or more.
Should water get into your NAD M2, shut o the power to the unit and
remove the plug from the AC socket. Have the unit inspected by a qualied
service technician before attempting to use it again.
DO NOT REMOVE THE COVER; THERE ARE NO USERSERVICEABLE
PARTS INSIDE.
ENGLISHFRANÇAISESPAÑOLITALIANODEUTSCHNEDERLANDSSVENSKAРУССКИЙ
3 Set the rear panel POWER switch to the “ON” position. The Standby LED
will illuminate amber (standby mode).
4 Press the front panel STANDBY button to turn ON the M2. The Standby
LED indicator will turn from amber to blue and illuminate the VFD.
5 Press the corresponding front panel input button of your preferred
source input.
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IDENTIFICATION OF CONTROLS
FRONT PANEL
1
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765 8
1 STANDBY LED: This indicator will light up amber when M2 is in
standby state. When M2 is at ON state, this indicator will illuminate blue.
2 STANDBY BUTTON: Press this button to switch ON the M2. The
Standby LED indicator will turn from amber to blue and illuminate the
VFD. Pressing the STANDBY button again turns the unit back to standby
mode.
IMPORTANT NOTICE
The rear panel POWER switch must be set to ON position for the
STANDBY button to activate. After pressing the STANDBY button, there
will be a delay before the M2 will be completely enabled. Please wait
until the initial “NAD M2” display in the VFD is extinguished before you
select any of the source input or features of your M2.
3 VACUUM FLUORESCENT DISPLAY (VFD): Display visual information
about the selected source input, menu options, volume level and other
related information and settings.
4 VOLUME: Use this control to adjust M2’s overall amplication or volume
level. Turn clockwise to increase the volume setting; counter clockwise
to lower it. The M2 features a “velocity sensing” volume control; rapid
movement changes the volume in large steps, slow movement increments
the volume in 0.5dB steps. The VOLUME knob is also used to select options
or adjust settings when MENU button is activated.
5 COAX 1: Select the source connected to the COAX 1 rear panel
terminal as the active input.
6 COAX 2: Select the source connected to the COAX 2 rear panel
terminal as the active input.
7 OPTICAL 1: Select the source connected to the OPTICAL 1 rear panel
terminal as the active input.
8 OPTICAL 2: Select source connected to the OPTICAL 2 rear panel
terminal as the active input.
9 10 11 12 13
10 BALANCED: Select the source connected to the BALANCED L and
BALANCED R rear panel connectors as the active input.
11 SINGLE-ENDED: Select the source connected to the SINGLE-ENDED L
and SINGLE-ENDED R rear panel terminals as the active input.
12 LOOP (DIGITAL PROCESSOR LOOP): Allow the insertion of external
digital lters into the signal path. This is the digital equivalent of the
analog “Tape Monitor Loop”. An example on how to take advantage of
this feature is illustrated below.
a Connect a digital input to the rear panel’s OPTICAL 1 TosLink optical
terminal.
b Connect the rear panel’s OPTICAL LOOP OUT to a compatible
OPTICAL IN of a Mac or any processor where the signal can be
subjected to a wide library of crossover lters, equalization or room
correction programs (Check if your Mac or processor has these
feature capabilities).
c Send out the processed signal from your Mac or processor’s
corresponding Optical Out port into M2’s OPTICAL LOOP IN thereby
completing the signal loop path.
d Press front panel’s “loop” button to select your OPTICAL 1’s
“processed” input signal. When “loop” feature is engaged, “LOOP” will
be continuously displayed at the lower left corner of the VFD after a
brief display of sample rate setting of the source.
IMPORTANT NOTICE
With “loop” button enabled, there will be no audio output if any
connection from the above “loop” setup example is “broken” (i.e., no
connection to OPTICAL OUT, not looped to “OPTICAL LOOP IN”, etc). Press
“loop” button again to deactivate or turn o the “loop” feature (“LOOP”
is extinguished in the VFD) thus returning to normal audio listening of a
selected source input.
NOTE
This digital processor loop feature can be applied to all analog and
digital audio input signal sources (Optical 1-2, Coax 1-2, AES/EBU,
BALANCED and SINGLE-ENDED).
9 AES/EBU: Select the source connected to the AES/EBU IN rear panel
connector as the active input.
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IDENTIFICATION OF CONTROLS
FRONT PANEL
13 MENU: Toggle to view the available options such as LEVEL TRIM and
SAMPLE RATE options for BALANCED and SINGLE-ENDED input signal
as well as selections for SPEAKER COMPENSATION and POLARIT Y. These
menu options are accessed by pressing the MENU button and then
rotating the VOLUME control knob clockwise or counterclockwise to
select desired level or setting. Release the VOLUME knob when you
reach your preferred level or setting. The change will take eect after a
few seconds when the display returns to show the default information
(selected input and volume setting). Press MENU button again to select
another menu option.
LEVEL TRIM: Adjust the BALANCED or SINGLE-ENDED input signal level
from -9dB to 0dB or FIXED.
-9dB to 0dB: Increase or decrease the input signal level from -9dB
to 0dB. This attenuates the signal before the Analog-to-Digital (A/D)
Converter. If the analog input signal sounds distorted, the input
should be attenuated.
NOTE
Attenuating too much can reduce the potential resolution of the A/D
Converter.
FIXED: This setting should be selected when M2 is connected
to the output of a preamplier and is used primarily as a power
amplier. Output level is xed and the M2’s Volume Control is
bypassed. Adjust the level using the source signal’s preamplier
volume or input level control.
NOTE
VOLUME control is bypassed and cannot be adjusted when LEVEL TRIM
is set to “FIXED” setting. The corresponding VOLUME level (in dB) will not
appear in the VFD; what will be shown instead is “VOL FIXED”. Set LEVEL
TRIM to any other level except “FIXED” to adjust VOLUME control to
desired level.
SAMPLE RATE (48 kHz, 96 kHz, 192 kHz): Select the user’s
preference for sample rate of the A/D Converter. Higher sampling
rates allow for anti-aliasing lters to take eect further outside the
audible frequency range and are generally considered to sound
better, especially in the high frequencies. You may need to reduce
the sampling rate if you are using the Digital Processor Loop, as many
external devices will not operate at 96 kHz or 192 kHz.
POLARITY (POSITIVE, REVERSED): Allow compensation for
recordings that have reversed polarity.
Positive: A positive sine wave at the input remains positive at the
output.
Reversed: A positive sine wave at the input is negative (inverted) or
reversed at the output.
IMPORTANT NOTICE
For all of the above menu options, a chosen option or level setting will
not immediately take eect upon selection. There will be a slight delay or
pause before the corresponding action or response is realized.
RENAMING A SOURCE INPUT
A particular source input can be renamed according to your preference.
You can use up to 20 characters in renaming a source input. Below is the
procedure on how to rename a source input.
Example: Rename “DIGITAL OPTICAL 1” to “BD PLAYER”.
1 Press the front panel “optical 1” button to select “DIGITAL OPTICAL
1” input. Then, press and hold the front panel “optical 1” button until
“DIGITAL OPTICAL 1” is shown in the lower section of the VFD and with
“D” ashing (Note that “DIGITAL OPTICAL 1” is also shown at upper
section of the VFD).
2 Within 5 seconds, rotate the VOLUME control knob clockwise or
counterclockwise to select the rst character (“B” from the alphabetical
list). The ranges of characters available are 0-9, _ (space) and A-Z.
3 Press the front panel “loop” button to select the character and at the
same time move on to the next character. Repeat steps 2 and 3 for
each character in sequence.
4 Complete the renaming process by pressing the front panel “menu”
button to save the new source input name.
NOTES
• Renamingofasourceinputcanonlybedoneusingthefrontpanelbuttons.
• Ifnochangeismadewithin5secondsorifthefrontpanelbuttonofthe
source input being renamed is pressed, the renaming process will be
automatically terminated with any renamed characters made not saved.
• Youcanterminatetherenamingprocessbypressinganyotherfront
panel buttons (except “loop”, “menu” or the current source input being
renamed). The renamed characters at the time of terminating the
process will be saved.
ENGLISHFRANÇAISESPAÑOLITALIANODEUTSCHNEDERLANDSSVENSKAРУССКИЙ
SPEAKER COMPENSATION (2 Ohms, 4 Ohms, 5 Ohms, 6 Ohms,
7 Ohms, 8 Ohms, >8 Ohms): Digital impedance compensation lter
allows ne tuning of the top octave to match the speaker impedance.
This will result in perfectly at frequency response at 20 kHz. The
eect of this lter may not be audible* but it is measurable, and it
compensates for the small eect of the digital reconstruction lter that
eliminates the 288 kHz sampling frequency of the amplier.
*The exception may be some electrostatic speakers that have very low
impedance at high frequency. The lower the HF impedance, the greater
the deviation from at response.
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ENGLISH FRANÇAIS ESPAÑOL ITALIANO DEUTSCH NEDERLANDS SVENSKA РУССКИЙ
IDENTIFICATION OF CONTROLS
REAR PANEL
1 875 6432 9 10 11 12 13 14 15
16 17
ATTENTION!
Please make sure that the M2 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 BALANCED: Connect XLR audio source to these connectors. Ensure
that proper pin congurations are followed – Pin 1: Ground, Pin 2:
Positive (signal live) and Pin 3: Negative (signal return).
2 SINGLE-ENDED: Use a twin RCA-to-RCA lead to connect to these
sockets the left and right analog output of a CD player, preamplier or
processor.
6 AES/EBU IN: Digital audio stream from professional audio sources like
3 DIGITAL AUDIO (COAX 1-2): Connect to the corresponding coaxial S/
PDIF-format digital output of sources such as SACD/CD players, HDTV or
satellite tuners and other components.
DIGITAL AUDIO OUT (COAXIAL OUT): Connect COAXIAL OUT to the
corresponding S/PDIF digital input of compatible devices such as CD
recorders, receivers, computer soundcard or other digital processors.
4 DIGITAL AUDIO (OPTICAL 1-2): Connect to the corresponding optical
S/PDIF-format digital output of sources such as SACD/CD players, HDTV
or satellite tuners and other components.
IMPORTANT NOTICE
For high-end sources with higher sampling rates like 176kHz and
192kHz, it is highly recommended that such sources be interfaced
with the AES/EBU IN connector. The AES/EBU IN is well suited to handle
sources with ultra-high sampling rates.
5 DIGITAL AUDIO OPTICAL LOOP (OPTICAL LOOP OUT, OPTICAL
LOOP IN): Connect OPTICAL LOOP OUT to the corresponding S/PDIF
digital input of compatible devices such as CD recorders, receivers,
computer soundcard or other digital processors. This OPTICAL LOOP
OUT terminal is the same digital output that can be fed to a Mac or
processor where the signal can be subjected to a wide library of third
party crossover lters, equalization or room correction programs.
7 DIGITAL SOFT CLIPPING™: Enables NAD’s proprietary Soft Clipping
8 OFF/AUTO TRIGGER SWITCH: When at AUTO position, the front panel
NOTE
The rear panel POWER switch must be set to ON position for the
18
The processed signal from the Mac or processor is then sent out
through their corresponding Optical Out port into M2’s OPTICAL LOOP
IN thereby completing the signal loop path.
Refer also to the item above about “LOOP (DIGITAL PROCESSOR LOOP)”
under IDENTIFICATION OF CONTROLS – FRONT PANEL.
SACD/CD Players or processors can be connected to this XLR connector.
For high-end sources with higher sampling rates like 176kHz and
192kHz, it is highly recommended that such sources be interfaced with
the AES/EBU IN connector. The AES/EBU IN is well suited to handle such
sources with high sampling rate.
circuitry on all channels. At ON position, Soft Clipping gently limits the
output of the M2 to minimize audible distortion should the amplier be
over-driven. Soft Clipping may simply be left ON at all times to reduce
the likelihood of audible distortion from excessive volume settings.
However, for critical listening and to preserve optimum dynamics, you
may wish to defeat it by setting this switch to “OFF” position.
STANDBY button is disabled and M2 remote control’s [ON/OFF] button
non-functional. At this condition, the M2 can only be switched ON from
standby mode or back to standby mode when +12V DC is applied or
cut o at the +12V TRIGGER IN jack. Slide the OFF/AUTO switch to OFF
setting for the M2 to be normally switched ON (or back to standby
mode) using the front panel STANDBY button or M2 remote control’s
[ON/OFF] button.
STANDBY button to activate. Switch the rear panel POWER switch to ON
position in order to make use of the +12V TRIGGER IN and OFF/AUTO
TRIGGER SWITCH features as well as the front panel STANDBY button.
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IDENTIFICATION OF CONTROLS
REAR PANEL
9 +12V TRIGGER IN: This input allows the M2 to be switched remotely
to standby mode or ON by ancillary equipment, such as an amplier,
preamp, AV processor, etc. The controlling device must be equipped
with a 12 V trigger output to use this feature.
10 +12V TRIGGER OUT: The +12V TRIGGER OUT is used for controlling
external equipment that is equipped with a +12V trigger input. This
output will be 12V when the M2 is ON and 0V when the unit is either
OFF or in standby mode.
11 RIGHT SPEAKERS: 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. There are two sets of RIGHT SPEAKER outputs and these are
identical in function (parallel connection) and are provided for ease of
Bi-wiring with heavy audiophile cables. Double check your speaker
connections before powering up the M2.
Always use heavy duty (16 gauge; 1.5mm, or thicker) stranded wire
to connect loudspeakers to your M2. 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.
BI-WIRING
Most modern high quality loudspeakers oer the option of Bi-wiring.
This separates the HF crossover from the LF crossover and oers
enhanced performance by preventing LF return currents from aecting
the HF performance. If you decide to bi-wire, be sure to remove the
“links” at the loudspeaker that connect the LF and HF sections (these are
provided for convenience when single wire connection is used). Your
loudspeaker instruction manual should cover this subject as well.
14 FUSE HOLDER: In the unlikely event a fuse may need to be replaced,
unplug the AC cord from the wall. Disconnect also the AC cord from
M2’s AC Mains input socket. Then, remove all connections from the
amplier. Use a athead screw or similar to open the fuse holder via the
slot located on the top edge of the fuse holder. With the screw driver
in place, push it outward to unlatch and open the fuse holder. Only
replace the fuse with the same type, size, and specication.
IMPORTANT NOTICE
Do not use any substitute fuses of dierent types, ratings or values.
Failure to observe this precaution may cause damage to the amplier
circuits and may create a re hazard and/or defeat the safety built into
the M2 thus voiding the warranty.
15 LEFT SPEAKERS: Connect the left speaker to the terminals marked “L
+” and “L-” ensuring that the “L+” is connected to the “+” terminal on your
loudspeaker and the “L-” is connected to the loudspeaker’s “-” terminal.
There are two sets of LEFT SPEAKER output and these are identical in
function (parallel connection) and are provided for ease of Bi-wiring
with heavy audiophile cables. Refer also to “RIGHT SPEAKERS” above.
16 RS-232: Connect this interface via RS-232 serial cable (not supplied)
to any Windows® compatible PC to allow remote control of the M2
through NAD’s proprietary PC software or other compatible external
controllers. NAD is a certied partner of AMX, Control4, Crestron and
Savant and fully supports these external devices. See your NAD audio
specialist for more information.
17 IR IN: 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 M2 from a remote location.
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WARNING
The M2 employs a “oating” ground design. External devices (such as
speaker switching or headphone adaptors) that connect the left and
right channels together must not be used with the M2. Left and right
channels must never be connected to each other.
12 POWER SWITCH: The POWER switch supplies the master AC mains
power for the M2. When this switch is at ON position, the M2 is in
standby mode as shown by the amber status condition of the standby
LED. Toggle the front panel’s STANDBY button to switch ON the M2 or
back to standby mode. If you intend not to use the M2 for long periods
of time (such as when on vacation), switch the POWER switch to the
OFF position. When the POWER switch is at OFF position, the front
panel STANDBY button or M2 remote control cannot activate the M2.
13 AC MAINS INPUT: The M2 comes supplied with a separate AC Mains
cable. Before connecting the cable to a live wall socket ensure that
it is rmly connected to the M2’s AC Mains input socket rst. Always
disconnect the AC Mains cable plug from the live wall socket rst,
before disconnecting the cable from the M2’s Mains input socket.
18 GROUND TERMINAL: The M2 requires a grounded AC receptacle or a
separate earth ground. Use this terminal to properly ground your M2. A
ground lead wire or similar can be used to connect the M2 to ground
via this ground terminal. After insertion, tighten the terminal to secure
the lead.
BARE WIRES AND PIN CONNECTORS
Bare wires and pin connectors should be inserted into the hole in the shaft
of the terminal. Unscrew the terminal’s 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. Avoid any danger
of bare metal from the cables touching the rear panel or another connector.
SPADE CONNECTORS
These should be slotted under the terminal’s screw bushing, which is then
fully tightened. Ensure the connector is tightly secured and there is no
danger of bare metal from spade connectors touching the rear panel or
another connector as this may cause damage.
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ENGLISH FRANÇAIS ESPAÑOL ITALIANO DEUTSCH NEDERLANDS SVENSKA РУССКИЙ
IDENTIFICATION OF CONTROLS
REAR PANEL
EXAMPLE ILLUSTRATION OF GROUNDING THE M2
VIA THE REAR PANEL GROUND TERMINAL
NOTES
• TheaboveillustrationshowstheM2beingconnectedtogroundvia
a metal water pipe. There maybe other grounding conductor points
in your home. Consult with a licensed electrician to properly locate
or correctly install a grounding conductor in your home. NAD is not
responsible for any malfunction, damage or costs associated with the
installation, connection or grounding of your M2.
• ThegroundingwireisnotsuppliedwithyourM2.
DIGITAL POWERDRIVE
The M2 uses NAD’s proprietary Digital PowerDrive™ amplier technology
that allows substantial additional power for short periods of time. Research
has shown that the peak to average power required to faithfully reproduce
music can be a factor of ten for well recorded performances. Digital
PowerDrive uniquely satises this requirement. Music sounds more
dynamic and “open” with PowerDrive because the musical transients that are
present in a live performance are not reduced in amplitude or “compressed”.
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IDENTIFICATION OF CONTROLS
M2 REMOTE CONTROL
1 ON: Switch M2 ON.
1
2
2 OFF: Switch M2 OFF.
3 COAX 1-2, OPT 1-2, AES/EBU: Select Coaxial, Optical or AES/EBU digital source input.
ENGLISHFRANÇAISESPAÑOLITALIANODEUTSCHNEDERLANDSSVENSKAРУССКИЙ
3
5
6
7 8
4 PRO LOOP: Activate or deactivate “loop” feature.
4
5 BALANCED: Select BALANCED source input.
SINGLE-ENDED: Select SINGLE-ENDED source input.
6 MUTE: Temporarily shuts down audio output.
7 DIM: Reduce or restore VFD brightness.
8 VOL : Increase or decrease the loudness level.
9 DEVICE SELECTOR 1-2: Switch between
DVD and CD control functions. Set to position
“1” for applicable CD control button functions
- compatible with NAD models like C515BEE,
C545BEE, C565BEE and M5. Set to position “2”
for applicable DVD control button functions compatible with NAD models like T 535, M55,
T585 and DVD section of L54, VISOFIVE and
VISOTWO.
9
CD PLAYER CONTROL (for use with compatible NAD CD or SACD/CD Players) : Set the DEVICE
SELECTOR to “1” in order to gain access to these buttons.
REPEAT: Repeat track, le or whole disc.
RANDOM: Play tracks or les in random mode.
: Open or close disc tray.
: Stop playback.
: Pause playback temporarily.
: Go to beginning of current/previous track or le.
: Start playback.
: Go to next track or le.
DVD PLAYER CONTROL (for use with compatible NAD DVD Players) : Set the DEVICE SELECTOR
to “2” in order to gain access to these buttons.
TITLE: Display DVD title menu.
MENU: Access menu on a DVD disc.
DISP: Access on-screen display.
RTN: Exit from a menu window.
: Select an item in a menu.
ENTER: Acknowledge menu selection.
: Open or close disc tray.
: Stop playback.
: Pause playback temporarily.
: Go to the beginning of current/previous track, le or chapter.
: Start playback.
: Go to next track, le or chapter..
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ENGLISH FRANÇAIS ESPAÑOL ITALIANO DEUTSCH NEDERLANDS SVENSKA РУССКИЙ
REFERENCE
TROUBLESHOOTING
CONDITION POSSIBLE CAUSES POSSIBLE SOLUTIONS
The VFD displays
“PROTECTION
LEFT AMP SHORT”.
The VFD displays
“PROTECTION
RIGHT AMP SHORT”.
The VFD displays
“PROTECTION
LEFT AND RIGHT SHORT”.
The VFD displays
“PROTECTION
LEFT CHANNEL ERROR”.
The VFD displays
“PROTECTION
RIGHT CHANNEL ERROR”.
The VFD displays
“PROTECTION
LEFT AND RIGHT ERROR”.
The VFD displays
“MAIN POWER ERROR”.
The VFD displays
“START UP ERROR
POWER OFF”.
The VFD displays
“OVERHEAT”.
No power. • The power cord is disconnected. • Plug the power cord into the wall outlet
• Left output short circuit. • Shut down M2 by turning o the rear
• Right output short circuit.
• Left and right output short circuit.
• Left channel internal error. • Shut down M2 by turning o the rear
• Right channel internal error.
• Left and right channel internal error.
• Error with the internal power supply.
• Internal initialization error when powered on.
• The M2 is too hot due to insucient ventilation. • Shut down M2 by turning o the rear panel
• POWER switch shut down. • Set the POWER switch to ON position.
panel POWER switch. If there is no action
undertaken, the M2 will shut down itself (go
to standby mode) within 10 seconds the fault
happened.
• Check for any short circuit at the left and/or
right channel output or LEFT and/or RIGHT
speakers before restarting the M2 again.
panel POWER switch. If there is no action
undertaken, the M2 will shut down itself (go
to standby mode) within 10 seconds the fault
happened.
• Restart again the M2 by switching ON the
rear panel POWER switch (if you have shut
down the M2 via the POWER switch) and then
pressing the front panel STANDBY button or
remote control’s [ON] button.
POWER switch. Ensure that there is adequate
space below, above and to the sides of the
M2 to allow proper air ow. After the M2
has cooled down normal operation will be
restored.
securely.
M2 always at standby mode; cannot
be switched ON using the front
panel STANDBY button or remote
control.
No sound. • Power AC lead unplugged or power not switched ON. • Check if AC lead is plugged-in and POWER
No sound one channel. • Speaker not properly connected or damaged. • Check connections and speakers.
M2 does not respond to remote
control commands.
• OFF/AUTO TRIGGER switch set to “AUTO” position. • Slide the OFF/AUTO TRIGGER to “OFF”
• The selected source input has no applied input signal
at the corresponding rear panel input socket.
• Volume control set to minimum level. • Turn Volume control up to audible level.
• “LOOP” feature is enabled and a connection in “loop”
setup is “broken” (i.e., no connection to OPTICAL OUT,
not looped to “OPTICAL LOOP IN”, etc).
• Input lead disconnected or damaged. • Check leads and connections.
• The remote control batteries are dead. • Replace the remote control batteries.
• Batteries incorrectly inserted. • Follow correct battery insertion setup.
• IR transmitter window on the remote control or IR
receiver window on the front panel is obstructed.
• M2 front panel is in very bright sunlight or ambient
light.
position.
switched ON.
• Check that there is active input signal applied
at the corresponding rear panel input socket.
• Check your “loop” connection setup.
• Press “loop” button again to deactivate or turn
o the “loop” feature (“LOOP” is extinguished
in the VFD) thus returning to normal audio
listening of a selected source input.
• Check IR windows and ensure clear line-ofsight from remote control to M2.
• Reduce sunlight/room lighting.
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DIGITAL INPUT (COAXIAL, OPTICAL, AES/EBU)
Input impedance 75 (coaxial)
110 (AES/EBU)
Sample rate 32kHz to 192kHz
Frequency response ±0.5dB (ref. 20Hz - 20kHz)
-3dB (ref. 96kHz)
Channel separation >90dB (ref. 10kHz, 4, 1/3 rated power)
ANALOG INPUT (BALANCED, SINGLE-ENDED)
Input impedance 36k//200pF
Input sensitivity 318mV (ref.100W)
503mV (ref. rated power)
Maximum input level 5.6Vrms (at -9dB level trim setting)
Frequency response ±0.3dB (ref. 20Hz - 20kHz)
Channel separation >80dB (ref. 10kHz, 4, 1/3 rated power)
OVERALL SPECIFICATIONS
Continuous output power (ref. 20Hz – 20kHz, rated THD) - 8 ≥250W
4 ≥250W
2 ≥300W
Rated distortion (THD, with AES17 and AP passive 20kHz LP lters) <0.004% (ref. 20Hz – 20kHz, 500mW - rated power)
Clipping power >250W (ref. 1kHz, 8, 0.1% THD)
IHF Dynamic power - 8 300W
4 ≥450W
2 ≥650W
Maximum output current >27A
Signal/Noise ratio > 95dB (A-weighted, ref. 1W )
>119dB (A-weighted, ref. 250W)
Damping factor >2000 (ref. 20Hz- 200Hz)
POWER CONSUMPTION
Normal operation 500W (ref. 100 - 240V AC 50/60 Hz)
Standby power 1W
Idle power 100W
REFERENCE
SPECIFICATIONS
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DIMENSION AND WEIGHT
Dimensions (W x H x D) 435 x 133 x 454 mm (Net)
435 x 148 x 502 mm (Gross*)
Net weight 20.2kg
Shipping weight 25.8kg
*- Gross dimensions include feet, volume knob and extended speaker terminals.
Specications are subject to change without prior notice. For updated documentation and features, please log onto www.NADelectronics.com for the latest
information about M2.
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www.NADelectronics.com
©2012 NAD ELECTRONICS INTERNATIONAL
A DIVISION OF LENBROOK INDUSTRIES LIMITED
All rights reserved. NAD and the NAD logo are trademarks of NAD Electronics International, a division of Lenbrook Industries Limited.
No part of this publication may be reproduced, stored or transmitted in any form without the written permission of NAD Electronics International.
While every effort has been made to ensure the contents are accurate at the time of publication, features and specifications may be subject to change without prior notice.
M2_ENG_OM_V12 MAY 2012
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