Bedienungsanleitung Naim NAC 252 (Seite 3 von 24) (Englisch)

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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

non-streaming preamplifiers. It begins with some general installation notes. Product

specific information begins in Section 4.

Introduction

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. Naim

Hi-Line interconnect cables will provide the best results.

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.

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.

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.

Use only the mains leads and plugs supplied or the Naim

PowerLine mains cable.

Note: Please read

the Statutory Safety

Warnings found at the

end of this manual.

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