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1 BALANCED
Use the BALANCED analog audio input of the M27 if the external
source to be connected has BALANCED audio output. Superior
audio quality is ensured with the distinctive noise reduction
capability of BALANCED connection with XLR jacks.
With BALANCED as the selected audio input, ensure that SELECT
switch is set to BALANCED.
For optimum heat dissipation in an AV surround system, the
following audio channel allocations are recommended:
Channel 1 = Front Left speaker
Channel 2 = Surround Left speaker
Channel 3 = Surround Back Left speaker
Channel 4 = Center speaker
Channel 5 = Surround Back Right speaker
Channel 6 = Surround Right speaker
Channel 7 = Front Right speaker
PIN CONFIGURATION OF BALANCED XLR JACK
Pin 1: Ground
Pin 2: Positive (signal live)
Pin 3: Negative (signal return)
IMPORTANT NOTES
Always turn OFF the M27 and other components in the system before
connecting or disconnecting anything to the BALANCED audio input
jacks.
Before switching ON the M27 from standby mode for the rst 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.
· Depending upon the source’s conguration, analog audio input
connection can be made up to seven channels either via BALANCED or
SINGLE-ENDED input ports.
2 SINGLE-ENDED
Use single-ended analog audio input for sources (preampliers or
processors) that are not equipped with BALANCED analog audio
output.
With SINGLE-ENDED as the selected audio input, ensure that SELECT
switch is set to SINGLE-ENDED.
3 PROTECT
When a specic channel goes to protect mode, the corresponding
PROTECT LED will turn red. The other ampliers that did not go
to protect mode will continue to function as indicated by their
respective PROTECT LEDs illuminated in green.
PROTECT LED INDICATOR COLORS
CONDITION PROTECT LED COLOR
POWER INDICATOR (NAD
LOGO) COLOR
Normal operation Green Bright/white
Overheat
Red (per applicable channels;
other channels may remain
green)
Bright/white
Short circuit No light (all channels) Red
IDENTIFICATION OF CONTROLS
REAR PANEL
© NAD M27
SELECT
BALANCED
SINGLE-ENDED
PROTECT
ANALOG AUDIO INPUT
SPEAKER
SELECT
BALANCED
SINGLE-ENDED
PROTECT
ANALOG AUDIO INPUT
SPEAKER
SELECT
BALANCED
SINGLE-ENDED
PROTECT
ANALOG AUDIO INPUT
SPEAKER
SELECT
BALANCED
SINGLE-ENDED
PROTECT
ANALOG AUDIO INPUT
SPEAKER
SELECT
BALANCED
SINGLE-ENDED
PROTECT
ANALOG AUDIO INPUT
SPEAKER
SELECT
BALANCED
SINGLE-ENDED
PROTECT
ANALOG AUDIO INPUT
SPEAKER
SELECT
BALANCED
SINGLE-ENDED
PROTECT
ANALOG AUDIO INPUT
SPEAKER
P O W E R R A T IN G
100 -1 20/2 20-2 40V 5 0/6 0H z 140 0W
M OD E L
M27 SEVEN CHANNEL POWER AMPLIFIER
NA D E L E C T R O NI C S IN T E R NAT IONA L
633 GRANITE COURT, P ICKERING , ON CANADA L1W 3K1
DESIGNED & ENGINEERED IN CANADA, CUSTOM MANUFACTURED IN CHINA
100-120/220-240V 50/60Hz
ATTENTION: UTILISER UN
FUSIBLE DE RECHANGE DE
MEME TYPE DE T15AL 250V.
CAUTION: REPLACE WITH
SAME TYPE T15AL 250V FUSE
POWER
ON
CHANNEL 1CHANNEL 2CHANNEL 3CHANNEL 4CHANNEL 5CHANNEL 6CHANNEL 7
CHANNEL 1
FRONT L
CHANNEL 2
SURR L
CHANNEL 3
SURR-B L
CHANNEL 4
CENTER
CHANNEL 5
SURR-B R
CHANNEL 6
SURR R
CHANNEL 7
FRONT R
:
:
TRIGGER
IN
LED
LEVEL
BALANCED INPUT
CONFIGURATION
PIN 1: GROUND
PIN 2: POSITIVE
PIN 3: NEGATIVE
BALANCED INPUT
CONFIGURATION
PIN 1: GROUND
PIN 2: POSITIVE
PIN 3: NEGATIVE
BALANCED INPUT
CONFIGURATION
PIN 1: GROUND
PIN 2: POSITIVE
PIN 3: NEGATIVE
BALANCED INPUT
CONFIGURATION
PIN 1: GROUND
PIN 2: POSITIVE
PIN 3: NEGATIVE
BALANCED INPUT
CONFIGURATION
PIN 1: GROUND
PIN 2: POSITIVE
PIN 3: NEGATIVE
BALANCED INPUT
CONFIGURATION
PIN 1: GROUND
PIN 2: POSITIVE
PIN 3: NEGATIVE
BALANCED INPUT
CONFIGURATION
PIN 1: GROUND
PIN 2: POSITIVE
PIN 3: NEGATIVE
+12V
4 5 6 7
8 9 10
1 2 3
ATTENTION!
Ensure that the M27 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.
7
ENGLISHFRANÇAISESPAÑOLITALIANODEUTSCHNEDERLANDSSVENSKAРУССКИЙ
7


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