Cambridgeaudio Azur 851C Owners Manual
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Contents Thank you for purchasing the Azur 851C Upsampling Compact Disc Player / DAC / Digital Preamp. 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 851C adheres to our three core principles – stunning performance, ease of use and incredible value. The 851C incorporates numerous advanced technologies and features. Key to its abilities is ATF2™ (Adaptive Time Filtering) our second generation up-sampling process - developed in conjunction with Anagram Technologies of Switzerland. This process intelligently interpolates all incoming audio data (such as 16-bit/44.1kHz from CD) to 24bit/384kHz through the use of a 32-bit Analog Devices Black Fin DSP (Digital Signal Processor). The ATF2 system applies polynomial curve fitting interpolation, and incorporates a time domain model that allows data buffering and re-clocking to almost completely eradicate digital jitter, helping to ensure the best possible sound quality. Our new ATF2 noise shaping algorithm now also provides enhanced linearity with 24-bit sources. Two very high quality Analog Devices AD1955 24-bit DACs (Digital to Analog Converters) are used in dual differential mode. Each channel has its own DAC to process information and completely separate and symmetrical analog filter circuitry is implemented. These allow both left and right channel circuitry to operate identically, ensuring the 851C delivers fantastic sound-staging and stereo imaging properties. All filtering from DACs to output is also fully differential in nature. This fully balanced configuration largely rejects the already very low noise and distortion products present in the DACs and filters and provides an unprecedented level of performance. Balanced (XLR) outputs are fitted as well as summed conventional unbalanced phono/RCA outputs. Automatic DC servo circuits null all DC offsets allowing no capacitors in the signal path. For this new model two 24-bit capable digital inputs are fitted allowing other digital sources to be brought into the 851C. Also a 24-bit isochronous USB audio interface is provided that enables the 851C to play audio from a personal computer / laptop. This can handle up to 24-bit/96kHz content from most Windows, Mac and Linux builds. In certain circumstances up to 24-bit/192kHz material can also be supported. See later section on Mac/PC/Linux setups and in particular our own free Windows driver. Digital volume and output mute functions are incorporated that enable the 851C to operate as a combined CD player, DAC and digital pre- amplifier that can be connected directly to a separate power amplifier if desired. In addition to these audiophile features Control Bus Input/Output, IR Emitter Input and RS232 control are provided to make it easy to integrate this unit into Custom Installation systems if desired. A new 8-series casework combines massive structural rigidity with careful damping and control of acoustic resonance. An Azur Navigator remote handset is also provided, giving full control of your CD player, Azur amplifiers and our iD100 digital iPod/iPad/iPhone dock in an attractive and easy to use handset. Your 851C can only be as good as the system it is connected to. Please do not compromise on your amplifier, speakers or cabling. Naturally we particularly recommend amplification from the Cambridge Audio Azur range, and in particular the 851A Integrated Amplifier which has been designed to the same exacting standards as the 851C. Your dealer can also supply excellent quality Cambridge Audio interconnects to ensure your system realises its full potential. Thanks for taking the time to read this manual; we do recommend you keep it for future reference. Matthew Bramble Cambridge A udio Technical Director and the 85 1C design team Introduction Make sure you register your purchase. Visit: www.cambridge-audio.com/sts By registering, youll be the first to know about: Future product releases Software upgrades Ne ws, 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 Audios policy is one of continuous improvement, therefore design and specifications 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. 2 Introduction ........................................................................\ ......................... 2 Important safety instructions ..................................................................... 3 Limited warranty ........................................................................\ .................. 4 Front panel controls ........................................................................\ ............ 6 Remote control ........................................................................\ .................... 7 Apple device compatibility ........................................................................\ .. 7 Operating instructions ........................................................................\ ........ 8 Filters ........................................................................\ ................................ 12 Custom installation (C.I.) use .................................................................. 14 T roubleshooting ........................................................................\ ................ 14 Technical specifications ........................................................................\ ... 15
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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. K eep these instructions. 3. Heed all w arnings. 4. F ollow all instructions. 5. Do no t use this apparatus near water. 6. Clean only with a dr y cloth. 7 . Do not block any ventilation openings. Install in accordance with the manufacturers instructions. 8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) 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 fit into your outlet, consult an electrician for replacement of the obsolete outlet. 10. Pr otect 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 specified b y the manufacturer. 12. Use with only the cart, stand, tripod, bracket, or table specified 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. U nplug this apparatus during lightning storms or when unused for long periods of time. 14. R efer all servicing to qualified 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 – T o reduce the risk of fire or electric shock, do not expose this unit to rain or moisture. – Batt eries (battery pack or batteries installed) shall not be exposed to excessive heat such as sunshine, fire 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 (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 filled with liquid, such as vases, shall be placed on the unit. Important safety instructions The lightning flash with the arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of un-insulated dangerous voltage within the products 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. 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 qualified service personnel. C-Tick mark This product meets the Australian Communications Authoritys Radio communications and EMC requirements. Gost-R Mark This product meets Russian electronic safety approvals. 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 e xperienced radio/TV technician for help. 3 851C azur ENGLISH