Cambridge Audio Azur 340A: инструкция

azur 340A

Integrated amplifier / HIFI-Verstärker / Amplificateur intégré / Amplificador integrado / Amplificatore

integrato / Geïntegreerde versterker / Integreret forstærker / 

Встроенный усилитель

User’s manual / Bedienungsanleitung / Mode d'emploi / Manual del usuario / Manuale per l'utente /

Gebruikershandleiding / Brugermanual / 

Руководство для пользователя

2  

azur integrated amplifier  

Thank  you  for  purchasing  this  Cambridge  Audio  azur  series  amplifier.  It

is   the   result   of   our   most   extensive   ever   research   and   development

program  in  over  three  decades  of  producing  high  quality  audio  products.

We  hope  that  you  will  appreciate  the  results  and  enjoy  many  years  of

listening  pleasure.

About  this  amplifier

The design of a high quality but cost-effective audio amplifier presents

a major challenge. Providing first-class performance on an unlimited

budget is one matter; achieving the same performance within tight price

limits is quite another, and requires the expertise and experience that

Cambridge Audio brings to its product design process. We believe we

have succeeded in our aim of creating a first-class affordable amplifier.

The wide bandwidth of this amplifier is ideal for the new "better than CD"

high bandwidth sources such as DVD-audio and Super Audio CD.

The power amplifier stages follow the same basic architecture that

Cambridge Audio have used in previous award-winning amplifiers, with

refinements to match it to its exact application in the Azur 340A. The

power amplifier input circuitry uses dual differential pairs, linearly

buffered from the input to establish optimal operating conditions. A

carefully controlled amount of local negative feedback is used in this

stage to define the stability margins so that any reactive load may be

driven effortlessly.

The output stage uses large-area silicon devices, with exceptionally

rapid thermal compensation to maintain correct output stage conditions

and so prevent crossover distortion, even under widely varying drive

conditions.

The power amplifiers incorporate an electronic muting system that

reacts extremely quickly and allows the complete suppression of

switching clicks, such as may occur when changing inputs or turning the

amplifier on and off.

The power supply is a vital part of a power amplifier. The Azur 340A

power amplifiers are fed from a power supply of elegant simplicity that

avoids the complications and uncertainties of regulated supplies. A

toroidal transformer selected for low external magnetic field, is used in

conjunction with generously specified reservoir capacitors and optimally

placed decoupling components.

Close attention has been paid to the performance and quality of the

passive components used, both in the signal paths and for decoupling

purposes.

The Cambridge Audio Azur 340A incorporates tone controls that give

vernier control of the frequency response, allowing the correction of

dubious source material, and compensation for loudspeaker

inadequacies or problems with room acoustics. These tone controls can

be switched completely out of the audio path by use of the DIRECT

switch, to give the shortest possible audio path. Other features include

24-carat gold-plated phono sockets, a tape send/return loop, a

headphone socket, and a second set of switchable loudspeaker

outputs.

The Cambridge Audio Azur 340A has full protection against misuse and

possible faults. The overload and short-circuit protection systems

continuously monitor the voltage, current and temperature of the output

devices, allowing the protection to act positively in case of genuine need,

but never triggering spuriously.

INTRODUCTION

340A Integrated amplifer

azur integrated amplifier  

3

Full temperature protection directly senses the device die temperatures

and shuts down the output if the amplifier overheats due to obstructed

ventilation or any other cause.

DC offset protection immediately isolates the amplifier from the

loudspeakers, by positively opening an output relay in the unlikely event

of an amplifier error.

Voltage clamping is built into the power amplifier output stages to safely

handle flyback transients from highly reactive loads.

A sophisticated microcontroller system handles the basic operation of

the amplifier, such as muting at switch-on and switch-off, protection and

so on.

Now we invite you to sit back, relax and enjoy!

Matthew Bramble

Technical Director

Introduction .................................................................................................2

Safety precautions ......................................................................................4

Important safety instructions..................................................................... 5

Rear panel connections .............................................................................6

Connecting.................................................................................................. 8

Operating instructions & controls........................................................... 10

Troubleshooting.........................................................................................14

Specifications............................................................................................14

Limited warranty....................................................................................... 15

CONTENTS

4  

azur integrated amplifier  

Plug  fitting  instructions  (UK only)

The cord supplied with this appliance is factory fitted with a 13A mains plug fitted

with a 3A fuse inside. If it is necessary to change the fuse, it is important that a 3A

one is used. If the plug needs to be changed because it is not suitable for your

socket, or becomes damaged, it should be cut off and an appropriate plug fitted

following the wiring instructions below. The plug must then be disposed of safely,

as insertion into a 13A socket is likely to cause an electrical hazard. Should it be

necessary to fit a 3-pin BS mains plug to the power cord the wires should be fitted

as shown in this diagram. The colours of the wires in the mains lead of this

appliance may not correspond with the coloured markings identifying the

terminals in your plug. Connect them as follows:-

The wire which is coloured BLUE must be

connected to the terminal which is marked

with the letter 'N' or coloured BLACK.

The wire which is coloured BROWN must be

connected to the terminal which is marked

with the letter 'L' or coloured RED

The wire which is coloured GREEN/YELLOW

must be connected to the terminal which is

marked with the letter 'E' or coloured

GREEN.

If your model does not have an earth wire,

then disregard this instruction.

If a 13 Amp (BS 1363) plug is used, a 3 Amp fuse must be fitted, or if any other

type of plug is used a 3 Amp or 5 Amp fuse must be fitted, either in the plug or

adaptor, or on the distribution board.   

Checking  the  power  supply  rating

For your own safety please read the following instructions carefully before

attempting to connect this unit to the mains.

Check that the rear of your unit indicates the correct supply voltage. If your mains

supply voltage is different, consult your dealer.

This unit is designed to operate only on the supply voltage and type that is

indicated on the rear panel of the unit. Connecting to other power sources may

damage the unit.

This equipment must be switched off when not in use and must not be used unless

correctly earthed. To reduce the risk of electric shock, do not remove the unit's

cover (or back). There are no user serviceable parts inside. Refer servicing to

qualified service personnel. If the power cord is fitted with a moulded mains plug

the unit must not be used if the plastic fuse carrier is not in place.

The lightning flash with the arrowhead symbol within an equilateral

triangle is intended to alert the user to the presence of uninsulated

'dangerous voltage' within the product's enclosure that may be of

sufficient magnitude to constitute a risk of electric shock to

persons.

The exclamation point within an equilateral triangle is intended to

alert the user to the presence of important operating and

maintenance instructions in the service literature relevant to this

appliance.

This product complies with European Low Voltage (73/23/EEC)

and Electromagnetic Compatibility (89/336/EEC) Directives

when used and installed according to this instruction manual. For

continued compliance only Cambridge Audio accessories should

be used with this product and servicing must be referred to

qualified service personnel.

SAFETY PRECAUTIONS

340A Integrated amplifer

azur integrated amplifier  

5

Please take a moment to read these notes before installing your Azur

amplifier, they will enable you to get the best performance and prolong

the life of the product. We advise you follow all instructions, heed all

warnings and keep the instructions for future reference.

The unit is of Class 1 construction and must be connected to a Mains

socket outlet with a protective earthing connection.

The unit requires ventilation above and below. Do not situate it on a rug

or other soft surface and do not obstruct any air inlet or outlet grilles on

the underside and top cover. Do not place in an enclosed area such as

a bookcase or in the cabinet.

Do not install near any heat sources such as radiators, heat register,

stove, or other apparatus (including amplifiers) that produce heat.

Do not defeat the safety purpose of the polarized or grounding type plug.

A polarized plug has two blades with one wider than the other. A

grounding type plug has two blades and a third grounding prong. The

wide blade or third prong are provided for your safety. If the provided

plug does not fit your outlet, consult an electrician for replacement of

the obsolete outlet.

WARNING - To reduce the risk of fire or electric shock, do not expose this

unit to rain or moisture. This unit must not be exposed to dripping or

splashing water or other liquids. No objects filled with liquid, such as

vases, shall be placed on the unit. In the event, switch off immediately,

disconnect from the mains supply and contact your dealer for advice.

Ensure that small objects do not fall through any ventilation grille. If this

happens, switch off immediately, disconnect from the mains supply and

contact your dealer for advice.

Do not route the power cable so that it can be walked upon or damaged

by other items near it.

It is recommended that when bi-amping, the same type power amplifiers

are used.

This unit must be disconnectted from the mains socket to be turned off

completely. If you do not intend to use this unit for a long period of time,

unplug it from the mains socket. Unplug this unit during lightning

storms.

To clean the unit, wipe its case with a moist, lint-free cloth. Do not use

any cleaning fluids containing alcohol, ammonia or abrasives. Do not

spray an aerosol at or near the amplifier.

This unit is not user servicable, never attempt to repair, dissassemble or

reconstruct the unit if there seems to be a problem. Servicing is required

when the unit has been damaged in any way, such as power-supply cord

or plug is damaged, liquid has been spilled or objects have frallen into

it, the unit has been exposed to rain or moisture, does not operate

normally or has been dropped. A serious electric shock could result if

this precautionary measure is ignored.

This unit should be installed on a sturdy, level surface. Due to stray

magnetic fields turntables should not be located nearby due to

interference.

IMPORTANT SAFETY INSTRUCTIONS

6  

azur integrated amplifier

AC power  socket

Once you have completed all connections to the amplifier, plug the AC

Power Cable into an appropriate mains socket. The amplifier is now

ready for use.

Loudspeaker  connections

The 340A has two sets of Loudspeaker terminals on the rear panel,

speakers A and B. Speakers A are the main speaker terminals, speakers

B are the secondary switchable speaker terminals. Connect the wires

from your left channel loudspeaker to the LEFT + & - terminals, and

likewise the wires from the right channel loudspeaker to the RIGHT + &

- terminals. In each case the red terminal is the positive output, and the

black terminal is the negative input. Care should be taken to ensure no

stray strands of wire are shorting speaker outputs together.

Note:  This  amplifier  has  been  designed  for  use  with  loudspeakers  that

have  a  nominal  impedance  of  between  4  and  8  ohms.

Please   ensure   that   the   speaker   terminals   have   been   tightened

adequately  to  provide  a  good  electrical  connection.  It  is  possible  for  the

sound  quality  to  be  affected  if  the  screw  terminals  are  loose.

Tape  mon

These sockets can be connected to a tape deck or to the analog sockets

on a MiniDisc or CD recorder. Connect an interconnect cable from the

recorder's Line Out sockets to the amplifier's Tape Monitor sockets. This

monitor doubles up as the standard tape/recording medium input.

Note:  When  connecting  a  source  component  that  has  both  an  input  and

output  i.e.  a  tape  recorder,  the  output  of  should  always  be  connected  to

the   Tape   Mon   input.   This   will   eliminate   howlround   if   the   wrong   input

channel  is  selected.

Power Rating:

  230V AC     50Hz

Designed and Engineered in London, England

www.cambridge-audio.co.uk

Manufactured in an

ISO9002

 approved facility

Power AC

Right

Left

Right

Left

Lef

t

B

A

Right

Lef

t

Right

B

A

Rec-Out

Tape In

AV / MD

DVD

Tuner / DAB

CD

Aux

Rec-Out

Tape I

n

AV / MD

DVD

Tuner / D

AB

CD

Aux

Right

Left

Right

Left

Impedance 4 - 8 ohms

Loudspeaker Terminals

Caution

Serial Number Label Removed

Risk of electric shock

Do not open

Caution

Risque de choc electrique

Ne pas ouvrir

Avis

Vorm offnen des gerates

Netzstecker ziehen

Achtung

azur 340A Integrated Amplifier

Max Power Consumption

:

  345W

REAR PANEL CONNECTIONS