Cambridge Audio AZUR 540A: инструкция

azur 540A/640A

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

INTRODUCTION

Thank yyou ffor ppurchasing tthis CCambridge AAudio aazur sseries aamplifier. IIt

reduced in size. This has the effect of reducing distortion, increasing

is tthe rresult oof oour mmost eext

ensive eever rresearch aand ddevelopment

dynamics and allowing the bandwidth to be opened up to a massive

program iin oover tthree ddecades oof pproducing hhigh qquality aaudio pproducts.

80kHz, ideal for the new 'better than CD' high bandwidth sources such

We hhope tthat yyou wwill aappreciate tthe rresults aand eenjoy mmany yyears oof

as DVD-Audio and Super Audio CD.

listening ppleasure.

The performance of any amplifier is limited by the dynamic abilities of its

power supply, and for this reason Cambridge Azur amplifiers incorporate

many features, including a low flux toroidal transformer, paralleling of

About tthis aamplifier

the reservoir capacitors and careful use of bypass capacitors, to allow

The design of any purist audio amplifier is mainly centred on two main

the instantaneous clean delivery of charge whenever it is needed. This

areas, the Power Supply and the driver stage's ability to drive the output

ensures an open and natural sound being reproduced and ensures a

stage effectively. We at Cambridge Audio have researched the best

positive response to any dynamics or sudden transients in the signal

possible ways to achieve the highest performance in these areas, at a

being reproduced.

sensible price. The Azur 540A/640A topology uses the same tried and

Particular attention has also been paid to the quality of the passive

tested output devices that Cambridge Audio have used in previous

components which have been carefully chosen for their sonic benefits.

award winning amplifier models, but many hours of research have gone

The Azur 640A in addition uses high grade Polypropylene signal bypass

into the study and development of the preceding stages. This driver

capacitors to improve signal flow and dynamics.

circuitry is essentially a matched differential input pair, loaded by a

current mirror and driven from a transient compensated current source

The Cambridge Audio Azur 540A and 640A amplifiers also incorporate

driving a high beta cascoded voltage gain stage. The thermally

tone controls, which may be switched out of circuit in 'direct' mode for

compensated output stage is setup to inherently give optimum Class AB

the shortest and therefore purest signal path. Other features include

conditions (for greatly reduced cross over distortion caused by dynamic

24k gold plated phono sockets, dual tape loops, pre amp output, a

heating of the output dies). In addition the topology includes a further

headphone socket and a secondary set of high level loudspeaker

improvement to the driver stage consisting of a pure class-A follower to

terminals.

isolate the voltage amplifier transistors from the difficult loading of the

An important feature which has been included as standard on both the

output transistors. This increased current drive to the output stage

540A and 640A is the new innovative Cambridge Audio designed CAP5

combined with a novel transient feed forward circuit doubles the slew

protection system. This consists of a microprocessor which constantly

rate to 40V/uS.

monitors the amplifier providing comprehensive protection against a

Due to critically refined circuit board layouts, careful component

variety of possible faults. This has been achieved without adding any

placement and short signal paths the stability of these amplifiers is

active circuitry into the signal path to degrade the sound or the dynamic

extremely high which allows the compensation components to be

abilities of the amplifier.

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540A/640A Integrated amplifier

CONTENTS

Cambridge Audio has built up an extensive knowledge base due to

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

meticulous listening and tweaking. This attention to detail results in

amplifiers that are totally convincing in the reproduction of both tonal

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

colour and dynamic contrast, deliver a vibrant and fluid performance

with music of all types and are extremely musically involving.

Installation...................................................................................................5

To get the absolute best from this equipment we would encourage you

to use only high quality source components. Of course we particularly

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

recommend tuners and digital equipment from the Cambridge Audio

range, all of which have been designed to the same exacting standards

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

as our amplifiers. Many types of loudspeakers were used in the

development of these amplifiers to ensure maximum compatibility with

Operating instructions..............................................................................10

a wide variety of designs.

Interconnects and speaker cables are also something that shouldn't be

CAP5 - Five way protection system...........................................................12

overlooked. Please do not compromise your system's performance by

using poor quality cables to connect source components to your

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

amplifier or the amplifiers output to your loudspeakers. A system is only

as good as its weakest link. For this reason we do not include cheap

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

"freebie" cables with any of our products. Your dealer can supply good

quality Cambridge Audio interconnects and Mordaunt Short/Gale

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

loudspeaker cables that will make a noticeable improvement to the

sound quality of your system.

Now wwe iinvite yyou tto ssit bback, rrelax aand eenjoy!

Matthew Bramble

Technical Director

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SAFETY PRECAUTIONS

Checking tthe ppower ssupply rrating

Plug ffitting iinstructions ((UK only)

For your own safety please read the following instructions carefully before

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

attempting to connect this unit to the mains.

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

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

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

supply voltage is different, consult your dealer.

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

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

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

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

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

damage the unit.

appliance may not correspond with the coloured markings identifying the

This equipment must be switched to Standby mode when not in use, unplugged if

terminals in your plug. Connect them as follows:-

not used for long periods of time, and must not be used unless correctly earthed.

The wire which is coloured BLUE must be

To reduce the risk of electric shock, do not remove the unit's cover (or back). There

connected to the terminal which is marked

are no user serviceable parts inside. Refer servicing to qualified service personnel.

with the letter 'N' or coloured BLACK.

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. Should you lose the fuse carrier the correct

The wire which is coloured BROWN must be

part must be reordered from your Cambridge Audio dealer.

connected to the terminal which is marked

with the letter 'L' or coloured RED

The lightning flash with the arrowhead symbol within an equilateral

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

The wire which is coloured GREEN/YELLOW

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

must be connected to the terminal which is

sufficient magnitude to constitute a risk of electric shock to

marked with the letter 'E' or coloured

persons.

GREEN.

The exclamation point within an equilateral triangle is intended to

If your model does not have an earth wire,

alert the user to the presence of important operating and

then disregard this instruction.

maintenance instructions in the service literature relevant to this

appliance.

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

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

adaptor, or on the distribution board.

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.

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540A/640A Integrated amplifier

INSTALLATION

Please take a moment to read these notes before installing your

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

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

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

the life of the product.

spray an aerosol at or near the amplifier.

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

These units are not user serviceable, never attempt to repair,

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

disassemble or reconstruct the unit if there seems to be a problem. A

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

serious electric shock could result if this precautionary measure is

as a bookcase or in a cabinet.

ignored. In the event of a problem or failure, please contact your dealer.

This unit must not be exposed to dripping or splashing water or other

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

liquids. No objects filled with liquid, such as vases, shall be placed on

magnetic fields turntables should not be located nearby due to

the unit. In the event, switch off immediately, disconnect from the mains

interference.

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.

Electronic audio components have a running in period of around a week

(if used several hours per day). This will allow the new components to

settle down, the sonic properties will improve over this time.

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

are used.

This amplifier has been designed to be left in Standby mode when not

in use, this will increase the life of the amplifier (this is true with all

electronic equipment). If you do not intend to use this unit for a long

period of time, unplug it from the mains socket.

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AC power ssocket

Note: TThis aamplifier hhas bbeen ddesigned ffor uuse wwith lloudspeakers tthat

have aa nnominal iimpedance oof bbe

tween 44 aand 88 oohms.

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

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

Please eensure tthat tthe sspeaker tterminals hhave bbeen ttightened

ready for use.

adequately tto pprovide a

a ggood eelectrical cconnection. IIt iis ppossible ffor tthe

sound qquality tto bbe aaffected iif tthe sscrew tterminals aare lloose.

Loudspeaker cconnections

Pre aamp oouts

The 540A and 640A have two sets of Loudspeaker terminals on the rear

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

Connect these sockets to the inputs on an external Power Amplifier(s).

speakers B are the secondary switchable speaker terminals. Connect

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

Tape mmon

and likewise the wires from the right channel loudspeaker to the RIGHT

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

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

the black terminal is the negative input. Care should be taken to ensure

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

no stray strands of wire are shorting speaker outputs together. Please

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

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R

B

A

Aux / Phono

azur 640A Integrated Amplifier

REAR PANEL CONNECTIONS

540A/640A Integrated amplifier

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

Ground cconnection

Note: WWhen cconnecting aa ssource ccomponent tthat hhas bboth aan iinput aand

If you are connecting a turntable to your amplifier then its ground wire

output ii.e. aa ttape rrecorder, tthe o

output oof wwhich sshould aalways bbe

should be attached to this point

connected tto tthe TTape MMon iinput. TThis wwill eeliminate hhowlround iif tthe

wrong iinput cchannel iis sselected.

Tape oout

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

Tape Out sockets of this amplifier to the recorder's Line In. Please note

that this unit has two tape loops which have identical outputs.

CD/Tuner/DVD/AV/MD iinput ssockets

These inputs are suitable for any 'line level' source equipment such as

CD players, DAB or FM/AM tuners etc.

Aux/Phono iinput ssockets

Connect any 'line level' source equipment to these sockets i.e. CD player

or DAB tuner. Alternatively this particular input can be converted to a

dedicated turntable if desired although to do this a Cambridge Audio

PM01 Phono Module must be fitted. Please contact your Cambridge

Audio dealer who can supply and install a phono stage to your amplifier.

These iinputs aare ffor aanalog aaudio ssignals oonly. TThey sshould nnot bbe

connected tto tthe ddigital ooutput oo

f aa CCD pplayer oor aany oother ddigital ddevice.

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CONNECTING

When designing our amplifiers we have tried to include features that

Tape cconnection

allow you to connect your system in various ways. The inclusion of

features such as PRE-OUT and SPEAKER B connections mean that you

The following diagram shows how to connect the amplifier to a tape

can configure your system depending on your requirements. The

recorder or other source with a record and monitor connection.

following diagrams are designed to make connection easy.

Please note that either of the tape loop outputs can be used (as they are

both the same).

Basic cconnection

The following diagram shows the basic connection of your amplifier to a

CD player and a pair of loudspeakers.

8

L

t

M

Manufactured in an

2

ISO9002

Risque de choc electrique

Tape // MMD Player

540A/640A Integrated amplifier

Bi-aamping

The azur amplifiers are equipped with PRE-OUT sockets. If your

loudspeakers have two sets of terminals then it is possible to bi-amp

your system using a further power amplifier. Bi-amping uses two

amplifiers to drive the bass and treble units in the loudspeakers

independently, resulting in even greater clarity coupled with improved

control and dynamics. An example of a bi-amp setup is illustrated in the

diagram adjacent.

Please note that if using a second azur amplifier as the slave amplifier,

any line input can be used to connect from the master’s Pre-Out.

Using SSpeaker BB connections

The Speaker B connections on the back of the amplifier allow a second

set of speakers to be used, which could be for another room.

9

D

Designed and Engineered in London, England

Treble Treble

Bass Bass

Slave aamplifier

- if using an integrated amplifier, volume must be set to full

Master aamplifier

CD player

EINLEITUNG

Vielen DDank, ddass SSie ssich ffür ddie AAnschaffung eeines CCambridge AAudio-

Ringkern-Transformatoren, parallel geschaltete Speicherkondensatoren

Verstärkers aaus dder AAzur-SSerie e

entschieden hhaben. DDieses GGerät iist ddas

sowie Bypass-Kondensatoren garantieren jederzeit eine saubere,

Resultat uunserer bbis hheute aaufwendigsten FForschung uund EEntwicklung.

dynamische Stromversorgung. Dies wiederum ermöglicht ein

Wir wwünschen IIhnen mmit ddiesem EErgebnis llangjährige FFreude.

kraftvolles, dynamisches Klangbild voller natürlicher Details und Fülle.

Besondere Aufmerksamkeit wurde der Auswahl passiver Bauteile

gewidmet, welche insbesondere nach klanglichen Kriterien ausgewählt

Einige DDetails

wurden. Im Azur 640A kommen zudem spezielle Polypropylen-

Planung und Entwicklung jedes puristischen Hifi-Verstärker-Konzepts

Kondensatoren zum Einsatz, insbesondere an klanglich sensiblen

konzentriert sich im Wesentlichen auf zwei Baugruppen, die

Punkten im Signalweg.

Stromversorgung und eine möglichst effiziente Treiberstufe

Hifi-Puristen können das Klangregelnetzwerk des Azur 540A / 640A bei

(Vorverstärker) zur Ansteuerung der Leistungstransistoren, also der

Bedarf komplett überbrücken. Es wird somit vollständig aus dem

eigentlichen Endstufe. Dem Cambridge Audio Entwickler-Team ist es

Signalweg entfernt. Der Anschluß eines Kopfhörers ist ebenfalls

gelungen, in diesen beiden wichtigen Bereichen die bestmögliche

möglich. Er wird direkt aus der kraftvollen Endstufe gespeist.

Lösung zu finden, um technisch Machbares in einem bisher nicht

dagewesenen Preis-/Leistungsverhältnis zu realisieren. Die bewährten

Eine neu entwickelte innovative Schutzschaltung, das Cambridge Audio

Leistungstransistoren der Verstärker Azur 540A / 640A kamen schon in

CAP5 System , schützt die Verstärker Azur 540A / 640A vor einer

den äußerst erfolgreichen Vorgänger-Modellen zum Einsatz. Die

Vielzahl möglicherweise auftretenden Defekte oder Fehlbedienungen.

vorgeschalteten Verstärker-Stufen wurden jedoch komplett neu

Dies geschieht durch prozessorgesteuerte Überwachung, ohne

entwickelt.

zusätzliche aktive Bauteile im Signalweg.

Auf Grund des überaus durchdachten Layouts, sorgfältig plazierter

All unser Wissen und langjährige Erfahrung haben wir in die neue Azur

Bauteile und kurzer Signalwege ergibt sich eine extrem hohe Stabilität

Generation einfließen lassen. Mit viel Liebe zum Detail entstanden Hifi-

der Verstärkerschaltung. Kompensationsschaltungen können somit auf

Verstärker, die klanglich wegen ihrer hohen Auflösung und Dynamik

ein Minimum reduziert werden. Verzerrungen können drastisch

überzeugen. Sie begeistern durch eine lebhafte, fließende Darbietung

reduziert werden. Dynamik und auch die Bandbreite von 80 kHz (!) -

jeder Art von Musik. Diese Verstärker beziehen den Hörer ins

wünschenswert für die hochauflösenden Formate wie DVD-Audio und

Klanggeschehen voll ein!

SACD - werden den Anforderungen neuer Medien gerecht.

Um das musikalische Potential dieses Gerätes voll ausschöpfen zu

Der Klang und die Performance eines Hifi-Verstärkers werden sehr oft

können, empfehlen wir sehr, bei der Auswahl der übrigen Komponenten

durch eine begrenzte Dynamik der Stromversorgung limitiert. Kräftige

Ihrer Stereoanlage auf ebenso hohe Qualität zu achten. Natürlich raten

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