32
44.1 Connection Notes
The mains earth grounds only the case and the electrostatic
screen within the transformer and is not connected to the
signal negative. The mains earth must always be connected to
“ground” regardless of any other equipment used. In order to
avoid hum-loops the signal negative of the whole system should
be connected to the mains earth in one place. This should be
the primary signal source.
44.2 Protection Notes
Once installed the NAP V175 is intended to remain permanently
powered up via its rear panel switch. If the internal heatsink
reaches 70°C due to prolonged running at very high dissipation
the mains supply will be interrupted and the indicator light will
go off until the amplifier has cooled down. This may take up to
thirty minutes.
NAPV 175
44 Installation and Operation
The NAPV 175 is a three channel power amplifier intended for use in home-theatre
systems. The three channels provide power to drive a centre channel speaker and a pair
of either main front or surround channel speakers. Audio line level input is via two 4-pin
DIN sockets - one for the centre channel and one for the main or surround pair.
The NAPV 175 should be installed 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 NAPV 175. The power button is located on the rear panel.
The NAPV 175 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 the 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.
44.3 Loudspeaker Cable and Connectors
Only Naim Audio speaker cable should be used to connect a
loudspeaker to the output of the NAP V175. Custom Naim Audio
loudspeaker connectors are supplied to make the connection.
IN ORDER TO COMPLY WITH CURRENT EUROPEAN SAFETY
REGULATIONS IT IS ESSENTIAL THAT THESE ARE USED.
DAMAGE TO THE AMPLIFIER MAY RESULT IF “HIGH
DEFINITION” CABLE OR ANY OTHER SPECIAL CABLE IS USED
TO CONNECT THE LOUDSPEAKERS.
45 NAPV 175 Rear
46 NAPV 175 Specification
Power Output:
50 Watts per channel, 8
Ω
Channels:
Three
Quiescent Consumption:
10VA
Voltage Gain:
+29dB
Input Impedance:
18k
Ω
Frequency Response:
-3dB @ 3Hz and 50kHz
Dimensions (H x W x D):
70 x 432 x 301mm
Weight
7.9kg
Mains Supply:
100-120V or 220-240V, 50/60Hz
mains
input and
fuse
right
speaker
left
speaker
signal input
ch1 & ch2
nc
signal
signal
nc
nc
Input - Centre
-ve
power
switch
centre
speaker
signal input
centre
ch2
ch1
nc
Input - Ch1 & Ch2
-ve
Содержание Amplifiers
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