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ENGLISH
9
6 BRIDGE MODE
The M33 amplier can be congured to be MONO (Bridge Mode),
more than doubling its output power. This way, the M33 can be used
as part of a high power stereo or home-theatre system, by connecting
additional power ampliers.
• In BRIDGED MODE (switch at ON (MONO) setting), the M33 will
produce approximately 640W into an 8 ohm loudspeaker. In this
mode, the amplier 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 amplier’s thermal cut-out to operate if played at
high levels.
• Set the BRIDGE MODE switch to the “ON (MONO)” position and
connect the speaker to the terminals marked “L +” and “R-” ensuring
that the “L+” is connected to the “+” terminal of your speaker and
the “R-” is connected to the speaker’s “ - ” terminal.
• Connect the source to the Left input sockets only. Do not connect
anything to the Right Input socket when Bridge Mode is selected.
7 RS 232
• NAD is an integration partner with several smart control and
automation systems like Control4, Crestron, LUTRON among others.
Check out NAD website for a list of NAD’s integration partners. See
your NAD audio specialist for more information.
• Connect this interface using RS-232 serial cable (not supplied) to
any Windows compatible PC to allow remote control of M33 via
compatible external controllers.
• Refer to NAD website for information about RS232 Protocol
documents and PC interface program.
8 IR IN
• This input is connected to the output of an IR (infrared) repeater
(Xantech or similar) or IR output of another compatible device to
allow control of the M33 from a remote location.
9 +12V TRIGGER IN
• With this input triggered by a 12V DC supply, the M33 can be
switched ON remotely from standby mode by compatible devices
such as ampliers, preampliers, receivers, etc. If the 12V DC supply
is cut o, the M33 will return to standby mode.
• Connect this +12V Trigger input to the remote device’s
corresponding +12V DC output jack using a mono cable with
3.5mm male plug. The controlling device must be equipped with a
+12V trigger output to use this feature.
10 SERVICE
• These USB port and tact switch are for servicing purposes only. Not
for consumer use.
11 OPTICAL 1-2/COAXIAL 1-2
• Connect to corresponding optical and coaxial digital output of
sources such as CD or BD/DVD players, digital cable box, digital
tuners and other applicable components.
• The sources will appear as “Optical 1”, “Optical 2”, “Coaxial 1” and
“Coaxial 2” in the navigation drawer of the BluOS App.
12 AES/EBU IN
• Digital audio stream from professional audio sources 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.
• The source will appear as “AES/EBU” in the navigation drawer of the
BluOS App.
13 BALANCED IN
• 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).
• The source will appear as “Balanced In” in the navigation drawer of
the BluOS App.
14 PHONO
• Input for either MM or MC phono cartridge. Connect the twin RCA
leads from your turntable to this input.
• If your turntable includes a ground/earth lead, it can be connected
to the Ground Terminal (refer to item 20 below).
• The source will appear as “Phono” in the navigation drawer of the
BluOS App.
15 LINE IN
• Input for line level sources such as CD player, tuner or any
compatible devices. Use dual RCA-to-RCA cable to connect the
source device’s left and right “Audio Output” to these line input
ports.
• The source will appear as “Line In” in the navigation drawer of the
BluOS App.
16 PRE OUT
• Use dual RCA-to-RCA cable to connect PRE-OUT to the
corresponding analog audio input of compatible devices such
as ampliers, receivers or other applicable devices. This makes it
possible to use the M33 as a pre-amplier to such devices.
17 SPEAKERS
• The M33 has two sets of SPEAKER connections which are identical
in function (parallel connection).
• Connect M33’s Right speaker terminals marked “R +” and “R-” to
the corresponding “+” and “-“ terminals of your designated right
speaker. Repeat the same for M33’s Left speaker terminals and
corresponding left speaker.
• Double check the speaker connections before powering up the
M33.
IMPORTANT NOTES
• The blue terminals must never be connected to ground (earth).
• Never connect the blue terminals together or to any common ground
device.
• Do not connect the output of this amplier to any headphone adapter,
speaker switch or any device that uses common ground for left and
right channels.
IDENTIFICATION OF CONTROLS
REAR PANEL
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