NAD Masters Series M25 - Manual (Page 7)

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INSTALLATION PRECAUTIONS
WARNING - To reduce the risk of fire or electrical shock, do not
expose the amplifier to rain or moisture.
CAUTION - For units factory-set at 115 volts AC match the wide blade
of the power plug to the wide slot of the power outlet, to prevent
electrical shock. Be sure the plug is completely inserted into the
receptacle.
Turn off all the components in the system whenever connecting or
disconnecting any audio signal wiring. Once all signal connections have
been completed, turn down all the system’s main volume control before
turning the system components on. Then increase the volume control
setting carefully to avoid damage to the system components.
NOTES ON INSTALLATION LOCATION
Read and follow all the safety instructions on the first page of this
manual. To prevent a fire or shock hazard, do not place the amplifier
where it will be exposed to any water or moisture. If liquid accidentally
gets into the amplifier, immediately unplug the AC power cord. Do not
operate the amplifier again until it has been examined by a service
technician.
The amplifier generates a moderate amount of heat, requiring
ventilation. Do not obstruct the air outlet grilles on the top or bottom
covers. There should be at least 3 inches (7.5 cm) of clearance above
the amplifier and 1 inch (2.5 cm) to the sides. Do not place the
amplifier in an enclosed area, such as in a bookcase or in a cabinet,
unless it is very well ventilated. Be sure there is adequate room behind
the amplifier for signal input and speaker output connections. If you
want to locate the amplifier on a carpeted floor, place a board under
it in order to prevent it from sinking into the carpet, blocking the air
inlets on the bottom. Do not place the amplifier where it will be
exposed to direct sun light for prolonged periods of time.
This unit may be installed on any sturdy, level surface.
]NOTES: The amplifier’s weight must always rest on its bottom feet.
Never put the amp down on its rear panel, with its front panel
facing up. Doing so risks damage to the input/output connectors.
The power transformer in the M25 generates a magnetic hum field
of moderate strength. Turntables (especially those with a moving-
coil pickup cartridge) should not be located near the amplifier.
Magnetic media, such as audio or video tapes and computer
diskettes, should not be stored near the amplifier.
TRANSPORTATION
Transport - Transport the amplifier in both inner and outer shipping
containers. Do not transport the apparatus using one shipping
container; to do so may result in damage to either the apparatus or
personnel.
SAVE ALL THE PACKAGING
Please save both boxes and all of the packaging in which your M25
arrived. Should you move or otherwise need to transport your amplifier,
this is by far the safest set of containers in which to do so. We’ve seen
too many otherwise perfect components damaged in transit for lack of
proper shipping cartons, so please: Save both inner and outer boxes!
REAR PANEL CONNECTIONS/CONTROLS
1. IEC POWER SOCKET
Connect to the supplied IEC-standard removable AC power cord
before connecting the AC power cord to the wall socket.
NOTE: Before connecting the AC-power cord to a live wall socket
insure that all inputs/outputs are connected first. Always
disconnect the AC power cord plug from the live wall socket first,
before disconnecting any cable from the M25 amplifier. If you must
use an extension cord, select a heavy-duty cord of the type used for
large electrical appliances, such as an air conditioner AC-extension
cord (16 AWG). We strongly recommend that you not connect the
amplifier’s mains cable to the accessory AC outlets on a
preamplifier. Such convenience outlets are not designed to supply
the high-power levels that the NAD M-series amplifier requires.
2. INPUTS
Each of the seven independent power amplifiers within the M25 has
its own signal input connector. Before making any connections to the
amplifier, make sure the POWER is switched OFF. [See figure 1]
Connect the signal cables from the preamplifier, surround sound
decoder, or other signal source to these inputs. For optimum heat
dissipation in an AV surround system, we recommend you allocate the
audio channels to the inputs as follows:
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
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