Bedienungsanleitung Cambridge Audio AZUR 851W (Seite 2 von 14) (Englisch)

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Contents

Thank you for purchasing this Azur 851W Class XD™ power amplier.

We are condent that you will enjoy many years of listening pleasure

from it. Like all Cambridge Audio products the Azur 851W adhere to

our three core principles – stunning performance, ease of use and

incredible value.

The 851W 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 joins the characteristics

of the output transistors together in a way that reduces distortion in

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

A white paper on this patented technology is available on our website:

www.cambridgeaudio.com

Please note that because of the Class XD technology the 851W 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.

Other features include a low resonance acoustically damped chassis

for freedom from distortion inducing vibrations. Four pairs of very

high current output transistors per output are used for excellent load

driving ability, plus the unique fth output transistor pair per channel

that provides the business end of the Class XD circuitry. High quality

polypropylene signal capacitors are used throughout, whilst multiple

copper bus-bars provide very low impedance conduits for the power

circuits and all resistors are 1% tolerance metal-lm types.

Balanced audio input connections are tted for the highest delity and

all inputs have loop outputs. The loop outputs can be used with the

851W’s Bi-Amp Mono and Bridged-Mono modes to allow two or more

851Ws to be used in very high quality systems.

The 851W features separate transformer secondaries for left and right

channels, twin rectiers and separate PSUs for dual mono operation of

the left and right power ampliers.

Your power amplier can only be as good as the system it is connected

to. Please do not compromise on your pre-amplier, source equipment,

speakers or cabling. Naturally we recommend models from the

Cambridge Audio Azur range, particularly the matching 851E pre-

amplier. 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 851W design team

Introduction

Make sure you register your purchase.

Visit: support.cambridgeaudio.com

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.

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

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

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

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

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

Connections .................................................................................................7

Unbalanced stereo connections .............................................................7

Balanced stereo connections ..................................................................7

Power syncing (On/Standby control) .......................................................8

Advanced connections .............................................................................8

Bi-wired stereo connections ....................................................................8

Bi-amped dual mono connections ..........................................................9

Bridged dual mono connections .............................................................9

Custom installation (C.I.) use .................................................................. 10

CAP5: Five-way protection system ........................................................... 11

Powering On/Off the 851W ..................................................................... 12

Conguration menu ................................................................................. 12

Technical specications ........................................................................... 13

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

Cambridge Audio AZUR 851W Seite 2

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