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851W

azur

ENGLISH

7

Connections

The 851W features both balanced (XLR) and unbalanced (RCA/Phono) output connections. For the best quality we recommend you use a balanced output 

with pre-amplifiers that feature this connection (such as our own 851E Pre-Amplifier).
Before making any connections to loudspeakers, make sure all power is turned off and only use suitable interconnects (e.g. banana plugs). Ensure that 

the positive (+) and negative (-) connections are matched. Your loudspeaker may have more than one pair of connecting terminals; LF (Low Frequency) 

and HF (High Frequency). For single-wiring it is recommended to connect to the LF terminals. The metal strip connecting the low-frequency terminals to 

the high-frequency terminals 

must not be removed

 (only to be removed for a bi-wiring system).

Unbalanced stereo connections

The diagram below shows the 851W connected to an 851E using the 

Unbalanced Audio inputs via phono/RCA connectors, single wired to a 

pair of loudspeakers.  

Balanced stereo connections

The diagram below shows the 851W connected to an 851E using the 

Balanced Audio inputs via three-pin XLR connectors, single wired to a 

pair of loudspeakers.  

When using unbalanced (phono/RCA) connections, the Left and Right 

Input Type switches on the 851W must be in the ‘Unbalanced’ position. 
Note:

 In this configuration the 851W must be set to Stereo mode.

When using balanced (XLR) connections, the Left and Right Input Type 

switches on the 851W must be in the ‘Balanced’ position. 

 

Note:

 In this configuration the 851W must be set to Stereo mode.

851W

851W

851E

851E

Summary of Contents for 851W

Page 1: ...Your music our passion 851W azur Power Amplifier User s manual 2 ENGLISH ...

Page 2: ...ies for left and right channels twin rectifiers and separate PSUs for dual mono operation of the left and right power amplifiers Your power amplifier can only be as good as the system it is connected to Please do not compromise on your pre amplifier source equipment speakers or cabling Naturally we recommend models from the Cambridge Audio Azur range particularly the matching 851E pre amplifier Th...

Page 3: ...uct 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 tria...

Page 4: ...e units are not user serviceable Never attempt to repair disassemble or reconstruct the unit if there seems to be a problem A serious electric shock could result if this precautionary measure is ignored In the event of a problem or failure please contact your dealer Cambridge Audio warrants this product to be free from defects in materials and workmanship subject to the terms set forth below Cambr...

Page 5: ...y all modern pre amplifiers fulfil this requirement 4 Input Type switch Use to select a balanced or unbalanced connection type for the input 5 Stereo Mono mode switch Switches the 851W between normal Stereo operation where one 851W is used for a pair of speakers and Mono operation where two 851W s are used one for each speaker Refer to later sections of this manual for more information 6 Mono mode...

Page 6: ...ive The LED light emitting diode is on for an active output off for inactive i e muted 3 Protection If this LED is constantly on the 851W has detected a fault on either the Left or Right channel and is protecting itself 4 Clipping This LED indicates that the 851W has detected that either the Left or Right channel is being overdriven or clipped Clipping distortion is caused at high volume levels wh...

Page 7: ...ency terminals to the high frequency terminals must not be removed only to be removed for a bi wiring system Unbalanced stereo connections The diagram below shows the 851W connected to an 851E using the Unbalanced Audio inputs via phono RCA connectors single wired to a pair of loudspeakers Balanced stereo connections The diagram below shows the 851W connected to an 851E using the Balanced Audio in...

Page 8: ...e recommended method when using an 851E and other Cambridge Audio equipment with Control Bus In Out Trigger In Out can be useful if the 851W and indeed 851E is desired to be controlled by other equipment that features trigger outputs Custom install and or Multi Room Systems etc Advanced connections As well as normal single wired stereo operation whether balanced or unbalanced several other modes o...

Page 9: ...Mono settings that allow two or more 851Ws to be used as mono blocs for high end systems Below is an example using two 851Ws in Bi Amped Mono with an 851E In Bi Amped Mono mode each 851W drives one speaker Note Unbalanced connections can also be used Important 851W settings Only use the Left Inputs on the 851W for Bi Amped operation In this configuration the Stereo Mono switch on the 851W must be ...

Page 10: ...ut demodulated on the Control Bus Output The unit responds to direct IR Control codes as well as toggle codes for some features to simplify programming custom installation systems Special direct On Off and Mute commands can be accessed from the 851E pre amplifier remote control for teaching into C I systems as follows 1 Press and hold the Standby On button The remote first generates a standby togg...

Page 11: ...ring the output transistors to keep them working inside their Safe Operating Area SOA The SOA is a set of limits given by the output transistor manufacturer to ensure reliability V I also protects the amplifier against short circuits on the speaker terminals during use Remedy The amplifier is being used outside its performance envelope Reduce the volume Also check to see if there is a short or par...

Page 12: ...Bi Amp or Bridged There is a loud buzz or hum Ensure that no interconnects are loose or defective Ensure that your tape deck turntable is not too close to the unit There is weak bass or diffused stereo imaging Ensure that the loudspeakers are not wired out of phase For more frequently asked questions FAQs technical advice and information on getting the most out of your 851W please visit the Suppor...

Page 13: ...e Audio is a brand of Audio Partnership Plc Registered Office Gallery Court Hankey Place London SE1 4BB United Kingdom Registered in England No 2953313 www cambridge audio com 2013 Cambridge Audio Ltd AP32386 2 ...

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