Rear Panel - NAD M22 Owner's Manual

RIGHT SPEAKERS
11
ATTENTION!
Ensure that the M22 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.
1 BALANCED
• Use the BALANCED analog audio input of the M22 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 the SELECT
switches for both L (Left) and R (Right) channels of ANALOG AUDIO
INPUT are set to BALANCED.
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 M22 and other components in the system before
connecting or disconnecting anything to the BALANCED audio input
jacks.
• Before switching ON the M22 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.
2 SINGLE-ENDED
• Use single-ended analog audio input for sources (preamplifiers or
processors) that are not equipped with BALANCED analog audio
output.
• With SINGLE-ENDED as the selected audio input, ensure that the
SELECT switches for both L (Left) and R (Right) channels of ANALOG
AUDIO INPUT are set to SINGLE-ENDED.
3 SELECT
• Use this switch to select the type of analog audio input.
• SELECT switch settings
Right position: SINGLE-ENDED input is selected.
Left position: BALANCED input is selected.
1 2
POWER
ANALOG AUDIO INPUT
100-240V 50/60Hz
R
3 4 5 6 7
IDENTIFICATION OF CONTROLS
1
+12V LED
TRIGGER LEVEL ANALOG AUDIO INPUT
ON
IN
GND
L
8 9 10
4 PROTECT
• When the M22 goes to protect mode, the PROTECT LED will turn
red.
PROTECT LED INDICATOR COLORS
CONDITION PROTECT LED COLOR
Normal operation Green
Overheat or short circuit Red
PROTECT MODE
If the PROTECT LEDs turn red, this indicates that the protection circuitry
of the M22 had been engaged. Immediately press the Standby button,
turn off Power switch and then unplug the mains power cord from the
mains power source. Undertake the following
a Check if all speaker wires are connected correctly and that none of
the wires are damaged, causing a short circuit.
b Another cause may be excessive heat build-up inside the amplifier.
Make sure there is adequate ventilation around the amplifier and
that none of its ventilation slots, top or bottom are blocked. After
the M22 has cooled down, it will function normally again.
c Do not attempt to use the M22 if the PROTECT LED or Power
indicator remained illuminated in red despite the checks mentioned
above. Bring the M22 to an authorized NAD service center for
proper inspection, testing and consequent repair if necessary.

REAR PANEL

2
LEFT SPEAKERS
© NAD M22
3 4 11
POWER INDICATOR
(NAD LOGO) COLOR
Bright/white
Red
7