Cambridge Azur 851A Bruksanvisning

Cambridge Mottaker Azur 851A

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Your music + our passion

851A

azur

Integrated Amplier

User’s manual

ENGLISH

Contents

Thank you for purchasing the Azur 851A Class XD Integrated Amplier.

The 8 series range is fundamental to our commitment to the continual

development of the Azur range. We hope that you will appreciate

the results and enjoy many years of listening pleasure from it. Like

all Cambridge Audio products, the 851A adheres to our three core

principles – stunning performance, ease of use and incredible value.

The 851A features our unique proprietary amplier topology; Class XD™,

designed to eliminate crossover distortion at low signal levels.

By actively displacing the crossover point this technology creates a region

of pure Class-A operation where the crossover zone would otherwise

be before moving into an enhanced form of Class B at higher levels. It

should not be confused with Class AB, which gives a small area of Class

A, but at the cost of higher distortion as soon as the signal level moves

outside the AB area. Class XD circuitry not only removes crossover

distortion from the zero-crossing point but also reduces distortion in the

other parts of the amplier’s output range.

This 851A features our latest development of Class XD with many tweaks

and enhancements from our on-going research resulting in our best

sounding implementation to date.

A white paper on this patent pending technology is available on our

website: www.cambridge-audio.com

Please note that because of the Class XD technology the 851A runs

slightly warmer than a conventional Class B/AB amplier and the

ventilation slots on the top of the unit must not be obstructed.

A new balanced volume topology has been implemented for this model,

controllable in 1 dB steps over most of the range, giving very ne control,

an accurate logarithmic law and superbly accurate channel balance.

Input switching is by high quality gold contact relays.

The 851A features separate transformer secondaries for left and right

channels, twin rectiers and separate PSU’s for dual mono operation of

the left and right power ampliers. A separate transformer supplies the

preamp making the 851A effectively a Pre and Power amp combination

in one box.

Balanced as well as unbalanced inputs are featured for Sources 1 and 2

giving optimal performance with equipment such as the matching 851C

Upsampling CD player which features balanced outputs.

The casework combines massive structural rigidity with careful damping

and control of acoustic resonance. An Azur Navigator remote control is

also provided, giving full remote control of your amplier in an attractive

and easy to use handset.

Control Bus Input/Output, IR Emitter Input and RS232 control are

featured making it easy to integrate the 851A into a Custom Installation

system if desired.

Your amplier can only be as good as the system it is connected to.

Please do not compromise on your source equipment, speakers or

cabling.

Naturally we particularly recommend models from the Cambridge Audio

Azur range. These have been designed to the same exacting standards

as this amplier. Your dealer can also supply excellent quality Cambridge

Audio interconnects to ensure your system realises its full potential.

Thank you for taking the time to read this manual; we do recommend you

keep it for future reference.

Matthew Bramble,

Cambridge Audio Technical Director

and the 8-Series design team

Introduction

Make sure you register your purchase.

Visit: www.cambridge-audio.com/sts

By registering, you’ll be the rst to

know about:

 Future product releases

 Software upgrades

 News, events and exclusive offers

plus competitions!

This guide is designed to make installing and using this

product as easy as possible. Information in this document has

been carefully checked for accuracy at the time of printing;

however, Cambridge Audio’s policy is one of continuous

improvement, therefore design and specications are

subject to change without prior notice.

This document contains proprietary information protected

by copyright. All rights are reserved. No part of this manual

may be reproduced by any mechanical, electronic or other

means, in any form, without prior written permission of the

manufacturer. All trademarks and registered trademarks are

the property of their respective owners.

Cambridge Audio and the Cambridge Audio logo are

trademarks of Cambridge Audio.

Other brands mentioned are trademarks of their respective

owners and are used for reference purposes only.

Cambridge Audio’s policy of continuous improvement means

design and specication may change without notice.

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

Important safety instructions .....................................................................3

Limited warranty ..........................................................................................4

Rear panel connections ..............................................................................5

Front panel controls ....................................................................................6

Remote control ............................................................................................7

Connections .................................................................................................8

Operating instructions ................................................................................9

Amplier setup ......................................................................................... 10

CAP5 - Fiveway protection system ........................................................... 12

Custom installation (C.I.) use .................................................................. 13

Technical specications ........................................................................... 13

Troubleshooting ........................................................................................ 13

For your own safety please read the following important safety

instructions carefully before attempting to connect this unit to the mains

power supply. They will also enable you to get the best performance from

and prolong the life of the unit:

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any ventilation openings. Install in accordance with the

manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat registers,

stoves, or other apparatus (including other ampliers) that produce

heat.

9. 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 the third prong are provided for your safety. If the

provided plug does not t into your outlet, consult an electrician for

replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched, particularly

at plugs, convenience receptacles and the point where they exit from

the apparatus.

11. Only use attachments/accessories specied by the manufacturer.

12. Use with only the cart, stand, tripod, bracket, or

table specied by the manufacturer, or sold with the

apparatus. When a cart is used, use caution when

moving the cart/ apparatus combination to avoid injury

from tip-over.

13. Unplug this apparatus during lightning storms or when unused for

long periods of time.

14. Refer all servicing to qualied service personnel. Servicing is

required when the apparatus has been damaged in any way, such

as the power-supply cord or plug having been damaged, liquid has

been spilled or objects have fallen into the apparatus, the apparatus

has been exposed to rain or moisture, does not operate normally, or

has been dropped.

WARNING

– To reduce the risk of re or electric shock, do not expose this unit to

rain or moisture.

– Batteries (battery pack or batteries installed) shall not be exposed to

excessive heat such as sunshine, re or the like.

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

socket outlet with a protective earthing connection.

The unit must be installed in a manner that makes disconnection of

the mains plug from the mains socket outlet (or appliance connector

from the rear of the unit) possible. Where the mains plug is used as the

disconnect device, the disconnect device shall remain readily operable.

Only use the mains cord supplied with this unit.

Please ensure there is ample ventilation. We recommend that you do

not place the unit in an enclosed space; if you wish to place the unit on

a shelf, use the top shelf to allow maximum ventilation. Do not put any

objects on top of this unit. Do not situate it on a rug or other soft surface

and do not obstruct any air inlets or outlet grilles. Do not cover the

ventilation grilles with items such as newspapers, tablecloths, curtains,

etc.

This unit must not be used near water or exposed to dripping or splashing

water or other liquids. No objects lled with liquid, such as vases, shall

be placed on the unit.

Important safety instructions

The lightning ash with the arrowhead symbol within an equilateral

triangle is intended to alert the user to the presence of un-insulated

‘dangerous voltage’ within the product’s enclosure that may be of

sufcient 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.

WEEE symbol

The crossed-out wheeled bin is the European Union symbol

for indicating separate collection for electrical and electronic

equipment. This product contains electrical and electronic

equipment which should be reused, recycled or recovered

and should not be disposed of with unsorted regular waste.

Please return the unit or contact the authorised dealer from whom you

purchased this product for more information.

CE mark

This product complies with European Low Voltage (2006/95/

EC), Electromagnetic Compatibility (2004/108/EC) and

Environmentally-friendly design of Energy-related Products (2009/125/

EC) 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

qualied service personnel.

C-Tick mark

This product meets the Australian Communications

Authority’s Radio communications and EMC requirements.

Gost-R Mark

This product meets Russian electronic safety approvals.

Caution

Hot surface when in normal use.

FCC regulations

NOTE: THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY RADIO

OR TV INTERFERENCE CAUSED BY UNAUTHORIZED MODIFICATIONS

TO THIS EQUIPMENT. SUCH MODIFICATIONS COULD VOID THE USER

AUTHORITY TO OPERATE THE EQUIPMENT.

This equipment has been tested and found to comply 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 energy

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 the equipment off and

on, the user is encouraged to try to correct the interference by one or

more of the following measures:

- Re-orient or relocate the receiving antenna.

- Increase the separation between the equipment and receiver.

- Connect the equipment into an outlet on a circuit different from that to

which the receiver is connected.

- Consult the dealer or an experienced radio/TV technician for help.

851Aazur

ENGLISH

Produkspesifikasjoner

Merke:	Cambridge
Kategori:	Mottaker
Modell:	Azur 851A
Vekt:	15000 g
Bredde:	430 mm
Dybde:	385 mm
Høyde:	115 mm
Bruksanvisning:	Ja
Tilkoblingsteknologi:	Koblet med ledninger (ikke trådløs)
Diskantjustering:	Ja
Strømforbruk (standby):	0.5 W
Produktfarge:	Sølv
Strømforbruk (vanlig bruk):	70 W
Hurtigstartsguide:	Ja
inngangsimpedans:	20000 Ω
Signal-til-støy-forhold (SNR):	93 dB
Av/på-bryter:	Ja
Total Harmonic Distortion (THD):	0.001
Lyd-utgang kanaler:	- kanaler
Formål:	Hjem
Frekvensrekkevidde:	10 - 50000 Hz
Bassjustering:	Ja
Tilkoblingstype høyttalere:	RCA
Forsterker, klasse:	XD
RMS utgangseffekt pr. kanal (4 Ohm):	200 W
Peak effekt per kanal:	- W
Dempningsfaktor:	110
RMS utgangseffekt pr. kanal (8 Ohm):	120 W