NAD C 372 - Manual (Page 6)

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6
Under normal operation, connect the right speaker to the terminals
market 'R +' and 'R-' ensuring that the 'R+' is connected to the '+'
terminal on your loudspeaker and the 'R-' is connected to the
loudspeaker's '-' terminal. Connect the terminals marked 'L+' and 'L-'
to the left speaker in the same way.
In Bridge Mode, connect the single speaker to the terminals marked 'R
+' and 'L+' ensuring that the 'L+' is connected to the '+' terminal on
your loudspeaker and the 'L+' is connected to the loudspeaker's '-'
terminal. Refer also to section "Bridging" in this chapter (No. 12).
Always use heavy duty (16 gauge; 1.5mm, or thicker) stranded wire
to connect loudspeakers to your NAD C 372. The high-current
binding post terminals can be used as a screw terminal for cables
terminating in spade or pin sockets or for cables with bare wire ends.
BARE WIRES AND PIN CONNECTORS
Bare wires and pin sockets should be inserted into the hole in the shaft
of the terminal. Unscrew the speaker terminal's plastic bushing until the
hole in the screw shaft is revealed. Insert the pin or bare cable end into
the hole and secure the cable by tightening down the terminal's
bushing. Ensure bare wire from the speaker cables does not touch the
back panel or another socket . Ensure that there is only 1/2" (1cm) of
bare cable or pin and no loose strands of speakers wire.
NOTE: Make sure the speaker impedance is 4 ohms or more when
connecting only one pair of speakers; make sure the speaker impedance
for all speakers is more then 8 ohms when connecting two sets of
speakers. In Bridge Mode, the impedance of the loudspeaker should
also be 8 ohms or higher.
17. SWITCHED AC OUTLET
The AC power cord of another component may be plugged into this
accessory outlet. Components plugged into this outlet will be switched
On and Off by the POWER button on the front panel or by the ON and
STAND-BY button on the remote control handset.
NOTE: The total power consumption of any components connected to
the AC outlets may not exceed 100 Watts.
18. IEC AC MAINS (POWER) INPUT
The C 372 comes supplied with a separate AC Mains cable. Before
connecting the cable to a live wall socket ensure that it is firmly
connected to the NAD C 372's AC Mains input socket first. Always
disconnect the AC Mains cable plug from the live wall socket first,
before disconnecting the cable from the C 372 Mains input socket.
FRONT PANEL CONTROLS (FIGURE 2)
1. POWER ON/OFF
Press the POWER button to switch the amplifier On. The Stand-by
indicator (No. 2) over the power button will light up amber and after a
short pause will turn to green to indicate the amplifier is now ready for
normal operation.
Pressing the POWER switch again will turn the unit OFF completely, it
will not respond to the remote control.
REMOTE CONTROL (FIGURE 3) ON AND OFF BUTTONS
Press the POWER button to switch the amplifier On. The Stand-by
indicator (No. 2) over the power button will light up amber. Pressing the
POWER switch again will turn the unit OFF completely, it will not
respond to the remote control. The NAD C 372 remote has a separate
On and Off button. This can be particularly useful to keep components
within a system "in sync": This way all components will switch to stand-
by when Off is pressed or switch to operating mode when On is pressed,
instead of some components switching On when the amplifier is
switched to Stand-by. (Note that the other components have to be
capable of responding to the separate On and Off commands as well).
Press the ON button to switch the unit from Stand-by to the operating
mode; The Stand-by indicator (Fig. 2; No. 2) will turn from amber to red,
then to green and the indicator for the last selected input will blink and
light up. Press the OFF button to switch the unit to the Stand-by mode:
The Stand-by indicator will light up amber.
NOTE: In Stand-by mode the C 372 uses very little power. However, it
is recommended that you switch the unit totally off if it is not going to
be used for more than a couple of days. Switch off completely by
pressing the POWER button on the front panel (No. 1), all lights will
extinguish.
2. POWER / STAND-BY / PROTECTION INDICATOR
Upon switching the power on, the LED will light up amber in standby
state. While one of the input select buttons is pressed, the LED will turn
red for a moment, then turn green for ON state. In cases of serious
abuse of the amplifier, such as overheating, excessively low loudspeaker
impedance, short circuit etc. the amplifier will engage its Protection
circuitry, indicated by the LED turning from green to red, and the sound
being muted. In such a case, turn the amplifier off, wait for it to cool
down and/or check the speaker connections, making sure the overall
loudspeaker impedance doesn’t go below 4 ohms. Once the cause for
the protection circuitry to engage has been removed, press Power again
to resume normal operation.
The diagram below shows the operation of the Stand-by / protection
indicator:
3. HEADPHONE SOCKET
A 1/4" stereo jack socket is supplied for headphone listening and will
work with conventional headphones of any impedance. The
headphone socket will work in parallel to the selected speakers. To
listen to headphones only, de-select Speakers A and/or B (No. 4).
The volume, tone and balance controls are operative for headphone
listening. Use a suitable adapter to connect headphones with other
types of sockets, such as 3.5mm stereo 'personal stereo' jack plugs.
NOTE: Make certain that the volume control is turned to minimum (fully
counter-clockwise) before connecting or disconnecting headphones.
Listening at high levels can damage your hearing.
4. SPEAKERS A & B
The Speakers A and B buttons engage or disengage the speakers
connected respectively to the Speakers A and Speakers B terminals on
the rear panel. Press A to switch the speakers connected to the speaker
A terminals On or Off. Press B to switch the speakers connected to the
speaker A terminals On or Off. The indicator directly over the buttons
shows the status of speakers A and B.
Green Amber Red
Normal Operation •
Stand-by •
Protection •