NAIM CD555, Owner'S Manual

E1

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

.

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 the 
CD555, CDX2, CD5 XS and CD5

s

i CD players and their associated or upgrade power 

supplies. It begins with some general installation notes and statutory safety warnings. 
Product specific information begins in Section 4.

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.

Introduction