Naim-audio NAC-N 172 XS User Manual download pdf (Page 3)

1 Connections

It is important for both safety and performance that

the standard cables supplied are not modified.

1.1 Interconnect Cables

If options are available with your equipment and

installation, DIN interconnect sockets should be used in

preference to RCA Phono sockets. One end of each Naim

interconnect cable is marked with a band to establish

its correct orientation. The band denotes the end that

connects to the signal source.

Interconnect plugs and sockets should be kept clean and

free from corrosion. The easiest way to clean them is to

switch off the equipment, pull the plugs out of their sockets,

and push them back in again. Contact cleaners and

“enhancers” should not be used as the film they deposit

may degrade the sound.

1.2 Loudspeaker Cables

Loudspeaker cables are vitally important. They should

each be at least 3.5 metres long and of equal length. The

recommended maximum is normally 20 metres although

longer cables may be viable with some Naim amplifiers.

Some Naim amplifiers are designed only to work with Naim

loudspeaker cable and using alternatives may degrade the

performance or even damage the amplifier. Other Naim

amplifiers can be used with any high quality loudspeaker

cable although we recommend that Naim loudspeaker

cable is used. Naim loudspeaker cable is directional and

should be oriented so that the printed arrow points towards

the speakers. The Naim loudspeaker connectors supplied

are designed to comply with European safety legislation

and must be used.

Contact your local retailer or distributor for further advice on

loudspeaker cables and connectors.

2 Mains Power

Where fused plugs are used 13 amp fuses should be

fitted. Fuses of a lower rating will fail after a period

of use. Do not wire voltage dependent resistors or

noise suppressors into mains plugs. They degrade the

mains supply and the sound.

Naim Audio products are conceived with performance as the top priority. Careful

installation will help ensure that their full potential is achieved. This manual covers all

preamplifiers, integrated amplifiers and power amplifiers. It begins with some general

installation notes and statutory safety warnings. Product specific information begins in

Section 4.

2.1 Mains Plug Wiring

In some territories a mains plug may need to be fitted to

the supplied mains lead. As the colours of the wires in the

mains lead may not correspond with the coloured markings

identifying the terminals in the plug proceed as follows:

The wire coloured GREEN-AND-YELLOW must be connected

to the terminal in the plug marked by the letter E or by

the safety earth symbol or coloured GREEN or GREEN and

YELLOW.

The wire coloured BLUE must be connected to the terminal

in the plug marked with the letter N or coloured BLACK.

The wire coloured BROWN must be connected to the

terminal in the plug marked with the letter L or coloured

RED.

2.2 Equipment Fuses

Mains powered Naim Audio equipment is fitted with a

mains fuse on the rear panel adjacent to the mains input

socket. Replace it if necessary only with the spare fuse

supplied or with an identical fuse. Repeated failure of the

fuse points to a fault that should be investigated by your

retailer or Naim itself.

2.3 Non-rewirable Mains Plugs

If a non-rewirable plug is cut from a mains lead (for

whatever purpose) the plug MUST be disposed of in a way

to render it totally useless. Considerable shock hazard exists

if the cut-off plug is inserted into a mains outlet.

2.4 Mains Circuits and Cables

A hi-fi system usually shares a mains circuit with other

household equipment some of which can cause distortion

of the mains waveform. This distortion can in turn lead to

mechanical hum from mains transformers. Some Naim

transformers are large in size, making them relatively

sensitive to such distortion, and it may be necessary to take

account of transformer hum when siting your equipment.

Transformer hum is not transmitted through the speakers

and has no effect on the performance of the system;

however, a separate mains circuit may reduce it. Such a

circuit (ideally with a 30 or 45 Amp rating) will also generally

improve system performance. Advice on the installation of

a separate mains circuit should be sought from a qualified

electrician.

Do not substitute alternative mains leads and plugs to

those supplied. They are selected to offer the best possible

performance.

Introduction

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Naim-audio NAC-N 172 XS User Manual Page 3

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