NAD M23 User Manual Download Page 7

ENGLISH

7

1  RIGHT SPEAKERS, LEFT SPEAKERS

• 

M23 is equipped with gold-plated, color-coded, transparent and 
special high-current binding-post speaker terminals. 

• 

Connect RIGHT SPEAKERS and LEFT SPEAKERS terminals to 
corresponding speakers. Make sure the “+” (red) terminal and “-” 
(black) terminal are connected to the corresponding “+” and “-” 
terminals of the speaker. Use extra care to ensure that no stray wires 
or strands cross between posts or terminals at either end.  

• 

M23 is designed to produce optimum sound quality when 
connected to speakers with impedances within its operating range. 
Make sure that all the speakers are rated 4 ohms minimum per 
speaker.

NOTE

 

Use stranded wire of at least 16 gauge (AWG). Connections to M23 
can be made with banana plugs or by using bare wire or pins. Use the 
transverse hole through the post for bare-wire or pin connections. 
By loosening the terminal’s nut, make a clean, neat connection and 
re-tighten carefully. To minimize the danger of short circuit, ensure that 
only 1/2-inch of exposed wire or pin is employed when connecting.

2 BALANCED 

• 

Use BALANCED audio input for external sources that are equipped 
with BALANCED audio output.  Superior audio quality is ensured 
with the distinctive noise reduction capability of BALANCED 
connection with XLR jacks. 

• 

If BALANCED is the selected audio input, ensure that the SELECT 
switches for both L (Left) and R (Right) channels of AUDIO INPUT are 
set or switched to the direction of BALANCED. 

PIN CONFIGURATION OF BALANCED XLR JACK

Pin 1: Ground
Pin 2: Positive (signal live) 
Pin 3: Negative (signal return)

IMPORTANT NOTES

•  Always power down M23 and other components in the system before 

connecting or disconnecting anything to the BALANCED audio input jacks. 

•  Before powering up M23 from standby mode for the first time, make sure that 

the volume control of the external source is set to minimum level position. This 
prevents inadvertently beginning a session at excessive volume.

3 SINGLE-ENDED

• 

Use SINGLE-ENDED audio input for sources (preamplifiers or processors) 
that are not equipped with BALANCED analog audio output. 

• 

If SINGLE-ENDED is the selected audio input, ensure that the SELECT 
switches for both L (Left) and R (Right) channels of AUDIO INPUT are 
set or switched to the direction of SINGLE-ENDED. 

4 SELECT

• 

Use this switch to select the type of audio input. 

• 

If SINGLE-ENDED is the selected audio input, ensure that the SELECT 
switches for both L (Left) and R (Right) channels of AUDIO INPUT are 
set or switched to the direction of SINGLE-ENDED.

• 

If BALANCED is the selected audio input, ensure that the SELECT 
switches for both L (Left) and R (Right) channels of AUDIO INPUT are 
set or switched to the direction of BALANCED.

5  +12V TRIGGER IN

• 

The +12V Trigger input allows the M23 to be switched remotely from 
standby to operating mode and vice-versa by an ancillary equipment 
such as a preamplifier, AV processor, etc. The controlling device must 
be equipped with a 12V trigger output to use this feature. 

IDENTIFICATION OF CONTROLS

REAR PANEL

SELECT 

SELECT 

BALANCED (R)

BALANCED (L)

SE (R)

SE (L)

 AUDIO INPUT

 (RIGHT)

SE

SE

 AUDIO INPUT

(LEFT)

12

4

4

5

6

7

9

8

11

10

1

1

2

2

3

ATTENTION! 

 

Ensure that the M23 is 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.

SELECT 

SELECT 

BALANCED (R)

BALANCED (L)

SE (R)

SE (L)

 AUDIO INPUT

 (RIGHT)

SE

SE

 AUDIO INPUT

(LEFT)

SELECT 

SELECT 

BALANCED (R)

BALANCED (L)

SE (R)

SE (L)

 AUDIO INPUT

 (RIGHT)

SE

SE

 AUDIO INPUT

(LEFT)

2 CHANNEL AUDIO OUT

UNBALANCED

R BALANCED

DIGITAL AUDIO OUTPUT

AES/EBU

S-VIDEO OUT

L BALANCED

L

R

POWER

ON

COMPONENT VIDEO OUT

AUDIO OUT

L

R

HDMI OUT1

HDMI OUT2

HDMI OUT1

HDMI OUT2

12V IN

12V OUT

DIGITAL AUDIO OUT

OPTICAL

COAXIAL

COMPONENT VIDEO OUT

COMPONENT VIDEO OUT

12V IN

12V OUT

DIGITAL AUDIO OUT

OPTICAL

COAXIAL

POWER

ON

100-240V ~ 50/60Hz

Summary of Contents for M23

Page 1: ...Owner s Manual ENGLISH Stereo Power Amplifier NAD M23 M23 ...

Page 2: ...s plug will fit 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 fit 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 b...

Page 3: ... 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 amplifiers that produce heat WARNING TO REDUCETHE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSETHIS PRODUCTTO RAIN OR MOISTURE CAUTION TO PREVENT ELECTRIC SHOCK MATCHWIDE BLADE OF PLUGTOWIDE SLOT FU...

Page 4: ...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 batte...

Page 5: ...ng level SAVE THE PACKAGING Please save the box and all of the packaging in which your M23 arrived Should you move or otherwise need to transport your M23 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 unit should be placed on a firm lev...

Page 6: ...white Normal operating mode Amber Standby mode Red Protect mode PROTECT MODE If the POWER INDICATOR turns red this indicates that the protection circuitry of the M23 had been engaged Immediately press the Standby button turn off Power switch and then unplug the power cord from the mains power source Undertake the following a Check if all speaker wires are connected correctly and that none of the w...

Page 7: ...ethat thevolumecontroloftheexternalsourceissettominimumlevelposition This preventsinadvertentlybeginningasessionatexcessivevolume 3 SINGLE ENDED Use SINGLE ENDED audio input for sources preamplifiers or processors that are not equipped with BALANCED analog audio output If SINGLE ENDED is the selected audio input ensure that the SELECT switches for both L Left and R Right channels of AUDIO INPUT ar...

Page 8: ...e source to Left Audio Input ports only Do not connect anything to Right Audio Input ports when Bridge Mode is selected Set BRIDGE MODE switch to OFF STEREO for normal operation 8 LED LEVEL DIMMER Press repeatedly to turn off or adjust the brightness level of the Power indicator 9 POWER The AC mains power to M23 is regulated by the POWER switch When the POWER switch is set to ON position M23 goes ...

Page 9: ...re is no active source input within 30 minutes Press o Standby to switch M23 from operating mode to standby mode AUTO SENSE Auto Sense feature instantaneously turns the M23 to operating mode from standby mode if it senses input signal minimum 20mV RMS input applied to either the BALANCED or SINGLE ENDED sockets Enable Auto Standby mode At operating mode press and hold o Standby button for 10 to 15...

Page 10: ... ohms 0 1 THD 700W IHF dynamic power Stereo mode at 1 kHz 1 THD 8 ohms 260W 4 ohms 520W Damping factor 800 ref 8 ohms Frequency response 0 3 dB 20 Hz 20 kHz Input sensitivity for 200W in 8 ohms 1 42V High Gain level 2 53V Mid Gain level 4 50V Low Gain level Gain level Low 19 dB Medium 24 dB High 29 dB Minimum input level for AutoTrigger 3 mV at 1 kHz Standby power 0 5W DIMENSION AND WEIGHT Gross d...

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