Audio Connections; Interconnect Cables; Mains Power Connection - NAIM Amplifiers Owner's Manual

Introduction
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, the Nait 5i Integrated Amplifier,
all Power Amplifiers and all Power Supplies but begins with general
installation notes and statutory safety warnings for all Naim Audio
products. Product specific information begins in Section 5.
1 Equipment Installation
Normally your Naim Audio equipment will have been installed by the dealer who sold
it to you - even if you live outside their immediate vicinity. In any event however
your dealer is responsible for making sure that the system sounds as it should.
Information given here is not intended to reduce this responsibility in any way.

2 Audio Connections

It is important for both safety and performance that
the standard cables supplied are not modified.

2.1 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 tend to deposit may degrade the
sound.
2.2 Loudspeaker Cables
Loudspeaker cables are vitally important and your dealer should
make them up to suit your installation. The cables 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. Contact your
dealer or Naim Audio for advice.
Many Naim amplifiers are designed only to work with Naim
loudspeaker cable and using alternatives may degrade the
performance or even damage the amplifier. Naim loudspeaker
cable is directional and should be oriented so that the printed
arrow points towards the speakers. The amplifier/loudspeaker
connectors supplied are designed to make a robust electro-
mechanical connection and to comply with European safety
regulations. They should be used in preference to alternatives.

3 Mains Power Connection

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.
3.1 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:
GREEN-AND-YELLOW
The wire which is coloured
connected to the terminal in the plug which is marked by the
letter E or by the safety earth symbol or coloured
GREEN and YELLOW.
The wire which is coloured BLUE
terminal in the plug which is marked with the letter
coloured BLACK.
The wire which is coloured BROWN
terminal in the plug which is marked with the letter
RED.
3.2 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.
3.3 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 lead to mechanical hum
from amplifier and power supply transformers. Naim transformers
are large in size with heavy gauge windings, making them
relatively sensitive to such distortion and it may be necessary to
take account of any 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 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.
must be
GREEN or
must be connected to the
N or
must be connected to the
L or coloured
1