Naim Audio NAC-N 172 XS - Manual (Page 41)

E39
43.1 General Connections Notes
The negative input and output connections are all
common. The mains earth should always be connected
regardless of what other equipment is used. This only
grounds the case and the electrostatic screen within the
transformer, and is not connected to the signal negative. In
order to avoid hum loops, the signal negative of the whole
system should be connected to the mains earth (ground)
in one place.
43.2 Protection Notes
If the amplifier’s external case reaches 70°C due to
prolonged running at high power, the mains supply will be
interrupted and the illuminated logo will switch off until the
amplifier has cooled down. This may take up to thirty minutes.
43 Installation and Operation
The NAP 200 should be installed on a dedicated equipment stand intended for the
purpose and should be in its final location before connecting cables or switching on.
Switch on the source and preamplifier components, with the volume turned down, before
switching on the NAP 200. The NAP 200 power button is located on the front panel.
The NAP 200 can provide power for an appropriate Naim Audio preamplifier. The power
supply output is carried on the DIN input socket.
The NAP 200 is heavy and care should be taken when lifting or moving it. Make sure that
the surface it is to be placed on can support its full weight.
OPERATION OF THE AMPLIFIER’S THERMAL PROTECTION
SUGGESTS PROLONGED USE AT TOO HIGH A VOLUME LEVEL.
YOUR LOUDSPEAKERS MAY BE AT RISK IF THIS IS THE CASE. THE
VOLUME SHOULD BE REDUCED.
43.3 Loudspeaker Cable and Connectors
Only Naim Audio speaker cable should be used to connect
a loudspeaker to the output of the NAP 200. Custom Naim
Audio loudspeaker connectors are supplied to make the
connection and in order to comply with current European
safety regulations these should always be used.
DAMAGE TO THE AMPLIFIER MAY RESULT IF “HIGH DEFINITION”
CABLE OR ANY OTHER SPECIAL CABLE IS USED TO CONNECT
THE LOUDSPEAKERS.
Ensure when connecting speakers that they are “in phase”.
That is, the positive and negative connection orientation
at both the speaker and amplifier ends of the cable is the
same for both channels.
45 NAP 200 Specification
Power Output: 70 Watts per channel, 8Ω
Quiescent Consumption: 11VA
Voltage Gain: +29dB
Input Impedance: 18kΩ
Frequency Response: -3dB @ 2Hz and 65kHz
Power Supply Output: 24V, 0.3A
Dimensions (H x W x D): 87 x 432 x 314mm
Weight 11.6kg
Mains Supply: 100V, 115V or 230V, 50/60Hz
mains input
and fuse
signal input
ch1(L) & ch2(R) and
preamp power
supply
ch2
-ve
ch1
24V
0.3A
Input/Preamp
Power Socket
NAP 200 Power Amplifier
left
speaker
right
speaker
44 NAP 200 Connections
44.1 NAP 200 Rear