Naim SNAXO 362 Owner's Manual

W O R L D C L A S S H I F I

O W N E R S M A N U A L I S S U E 1

Active Crossovers: SNAXO 362, SNAXO 242

	Introduction
	Naim Audio products are always conceived with performance as the		CONTENTS
			Page	Section
	top priority and careful installation will help ensure that their full		1	1 Equipment Installation
	potential is achieved. This manual begins with statutory safety		1	2 Cables and Connections
			1	3 Getting Started
	warnings and general installation tips for all Naim Audio products.
				3.1 switching on and off
	Product specific information begins in Section 6.			3.2 running in
			2	3.3 mains supply
				3.4 siting the equipment
				3.5 if you have a problem
	1 Equipment Installation		2	4 Warnings
			3	5 Connection
	Normally your Naim equipment will have been installed by the dealer who sold it to you
				5.1 mains lead
	even if you live outside their immediate vicinity. Your dealer is responsible for making
				5.2 mains plugs
	sure that the system sounds exactly as it should and information given here is not
				5.3 fuse carrier
	intended to reduce this responsibility in any way.			5.4 plug fuses
			4 6 SNAXO Installation and
	2 Cables and Connections			Operation
			4 7 SNAXO Rear Panel
	Please do not modify the standard interconnect cables			Diagrams
	supplied with your Naim equipment. This is important for		5 8 SNAXO Power Supply
	safety as well as performance. One end of each cable is			Connection Diagrams
	marked with a band to establish its correct orientation.		6 9 SNAXO to Amplifier
	The band always marks the end that connects to the			Connection Diagrams
	signal source.		9	Standards Declaration
	Loudspeaker leads are also very important. Naim
	loudspeaker cable is correct for your system and your
	dealer will make up leads to suit your equipment
	installation. The leads should each be at least 3.5 metres
	long and of equal length. The recommended maximum is
	20 metres. Loudspeaker leads are, like interconnect leads,
	directional, and should be connected so that the printed
	arrow points towards the speakers. Using alternative
	loudspeaker cable will degrade performance, and may even
	damage your amplifier. An exception to these loudspeaker	3 Getting Started
	cable constraints is the NAP 6-50 multi-room power
	amplifier. The NAP 6-50 is designed to be tolerant of both	3.1 switching on and off
	a wide variety of cable types, and cable runs well in excess
		Source components and power supplies for cd players,
	of 20m. The loudspeaker connectors supplied with all Naim
		tuners, preamplifiers and crossovers should be switched
	amplifiers and loudspeakers have been specifically
		on before switching on the power amplifier(s). Always
	designed to make a robust mechanical connection. It is
		switch the amplifier(s) off and wait about a minute for
	essential that these are used in order to comply with
		the power supply capacitors to discharge before
	current European safety regulations.
		connecting or disconnecting any leads. Always use the
	All the plugs and sockets supplied with your Naim	power switch on the product rather than a mains outlet
	equipment have been chosen because they make the best	switch.
	possible connection for their purpose. A poor contact will
	degrade the signal substantially and plugs and sockets	3.2 running in
	should look clean and free from corrosion. The easiest way	Your Naim equipment will take a considerable time to run
	to clean them is to switch off the equipment, pull the plugs	in before it performs at its best. The duration varies, but
	out of their sockets, and push them back in again. Special	under some conditions you will find that the sound
	contact cleaners and contact enhancers should not be	continues to improve for as much as five weeks. Better and
	used as they tend to deposit a film which is very difficult to	more consistent performance will be achieved if the system
	remove and may degrade the sound.	is left switched on for long periods. It is worth
		remembering however that all electronic equipment can be
		damaged by lightning. Please read the warnings section.

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Introduction

3.3 mains supply

Where fused plugs are used 13 amp fuses should be fitted. Fuses of a lower rating will fail after a period of use.

A hi-fi system usually shares a mains circuit with other household equipment some of which can cause distortion of the mains waveform. In some Naim equipment such distortion can lead to a mechanical hum from the transformers. The hum is not transmitted through the speakers and has no effect on the performance of the system but is purely local to the transformer itself. A separate fused mains circuit (like that reserved for electric cookers) may reduce transformer hum. Such a circuit (ideally with a 30 or 45 Amp rating) will also have a lower impedance, supply cleaner power, and consequently improve system performance.

Do not wire voltage dependent resistors or noise suppressors into mains plugs. They degrade the mains supply and the sound.

IMPORTANT

In order to comply with current European safety regulations it is essential that the Naim loudspeaker connectors supplied with amplifiers and loudspeakers are used.

Do not under any circumstances allow anyone to modify your Naim equipment without first checking with the factory, your dealer, or your distributor. Unauthorised modifications will invalidate your guarantee.

For your own safety do not under any circumstances open Naim equipment without first disconnecting the mains.

The following label is attached to all mains powered equipment:

W A R N I N G

THIS APPARATUS

MUST BE EARTHED

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3.4 siting the equipment

Power supplies and amplifiers should be located a reasonable distance away from other equipment. This separation will stop transformer radiation causing hum audible from the loudspeakers. The maximum separation distance for connected equipment is that allowed by the standard interconnect lead.

Some Naim equipment is extremely heavy. Ensure that your equipment rack or table can easily support the weight and is stable.

3.5 if you have a problem

Legal consumer protection varies from country to country. In most territories a dealer must be prepared to take back any Naim equipment he has sold you if he cannot make it work to your satisfaction in your own home. A problem may be due to a fault in any part of the system or its installation so it is essential to make full use of your local dealer’s diagnostic skills on site. Please contact your local distributor, or Naim at the address in the back of this manual, if any difficulties cannot be resolved. Some Naim equipment is made in special versions for different territories and this makes it impracticable to arrange international guarantees. Please establish the guarantee arrangements with your own dealer at the time of sale. We are always available to offer help and advice.

It is essential that repairs and updates are only carried out by an authorised Naim dealer, or at the factory by Naim itself. Many components are made, tested or matched specially for Naim and appropriate replacements are often unobtainable from non-specialist sources.

4 Warnings

Naim equipment is designed to offer the finest sound quality that can be achieved avoiding compromise wherever possible. This can lead to circumstances that may be unfamiliar. The material that follows contains advice specifically related to Naim equipment as well as more general warnings about the use of domestic audio products. Please read it carefully.

The transformers in Naim power amplifiers and power supplies may sometimes make a mechanical noise caused by distortion of the mains waveform. Naim transformers are large in size and have heavy gauge secondary windings making them relatively sensitive to such distortion. A separate mains circuit for your hi-fi system may reduce the effect while also giving an overall improvement in sound quality. It may be necessary however to take account of mechanical transformer noise when siting your equipment.

Introduction

In some circumstances, depending on where you live and the earthing arrangements in your home, you may experience radio frequency interference. Controls on broadcasting in some territories allow very high levels of radio frequency radiation and both the choice and exact siting of equipment may be critical. If there is a known problem in your locality it is advisable to arrange for a home demonstration before purchase to find out if Naim equipment is likely to be affected. Susceptibility to radio frequency interference is related to the wide internal bandwidth necessary for high sound quality. Systems incorporating moving coil phono preamplifiers and active crossovers are more likely to suffer. A radio frequency filter kit is available for some Naim equipment but sound quality will be progressively compromised as more elements of the kit are fitted. In situations of extreme radio interference Naim equipment may be unsuitable.

Your Naim hi-fi system can be damaged by lightning. Power amplifiers are particularly at risk and should be turned off when there is risk of lightning strike. For complete protection all mains plugs and any aerial cables should be disconnected when not in use.

Equipment must not be exposed to dripping or splashing and no objects filled with liquid, such as vases, should be placed on the equipment.

Use of non-standard speaker cables or interconnects may invalidate your guarantee.

5 Connection

5.1 mains lead

As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug proceed as follows:

The wire which is coloured GREEN-AND-YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or coloured green or green-and-yellow.

The wire which is coloured BLUE must be connected to the terminal in the plug which is marked with the letter N or coloured black.

The wire which is coloured BROWN must be connected to the terminal in the plug which is marked with the letter L or coloured red.

5.2 non-rewireable mains plugs

If a non-rewireable 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.

5.3 fuse carrier

Should the plug fuse carrier be damaged or lost, the correct replacement must be obtained from your dealer, or from Naim Audio direct. Do not use the plug until the fuse carrier is replaced.

5.4 plug fuses

Replace only with ASTA or BS 1362 approved fuses.

NOTE

This equipment has been tested and found to comply with the relevant EMC and Safety Standards, and, where applicable, also complies with the limits for a class B digital device, pursuant to Part 15 of the FCC Rules.

These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and the receiver.

•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

•Consult your Naim dealer or an experienced radio/TV technician for help.

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