Cambridge audio AZUR 551P, AZUR 651P User Manual
azur
Phone pre-amplier
User’s manual
2
ENGLISH
551P/651P
Your music + our passion
Contents
Introduction ................................................................................................... 3
Important safety instructions ....................................................................... 4
Limited warranty ............................................................................................ 7
Rear panel controls ....................................................................................... 8
Front panel controls ...................................................................................... 8
Rear panel connections ................................................................................ 9
Technical specications ..............................................................................10
Troubleshooting ........................................................................................... 10
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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 specications 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.
© Copyright Cambridge Audio Ltd 2012.
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.
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Introduction
Thank you for purchasing this Cambridge Audio azur series phono pre-
amplier. Like all Cambridge Audio products these phono pre-ampliers
adhere to three core principles – stunning performance, ease of use and
incredible value.
The design of a high quality but cost-effective phono pre-amplifer presents
a major challenge. Providing rst-class performance on an unlimited
budget is one matter; achieving the same performance within tight price
limits is quite another, and requires all the expertise and experience that
Cambridge Audio brings to its product design process. We believe we have
succeeded in our aim of creating a rst-class affordable product.
The 551P features a moving magnet stage whilst the 651P offers both
moving magnet and moving coil stages. Both use low noise discrete
transistors for the all-important input stages instead of the more common
integrated circuits.
Both are designed to produce high gain and linearity, without requiring
massive amounts of negative feedback to achieve low distortion. Both
models also employ a single-ended ‘Class A’ gain stage with audiophile
passive RIAA equalisation.
High quality components are used throughout such as 1% metal lm
resistors and close tolerance polypropylene capacitors.
The 651P uses more exotic amplication circuitry to provide even lower
distortion and noise plus a second higher gain stage for MC cartridges. In
addition, the 651P employs multi-parallel capacitors to achieve exceptional
RIAA accuracy of only 0.3dB up to 50kHz and features a defeatable
subsonic lter.
551P/651Pazur
Both units can be switched off from the front panel and feature a very high
efciency external transformer that consumes less than 0.5W when the
main unit is switched off.
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 551P/651P design team
ENGLISH
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Important safety instructions
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 ampliers) 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 specied by the manufacturer.
12. Use with only the cart, stand, tripod, bracket, or table
specied 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 qualied service personnel. Servicing is required
when the apparatus has been damaged in any way, such as the powersupply 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.
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 (at least 10cm clearance all
round). 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.
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