840A Class XD integrated amplifier
To set a fixed volume for a source, select FIXED INP in the System Configure menu:
Mode
Volume
Select the connected Azur models by pressing the appropriate input select button. For example, CA XXXC for an Azur CD player (540C V2, 640C V2), CA XXXD for an Azur DVD player, CA DAB T for an Azur DAB tuner etc.
Press ON & OFF to scroll through the options of ON (turns all Azur units on only), OFF (turns all Azur units into Standby only) or ON & OFF (turns all Azur units on and into Standby mode). Press OK to confirm and exit.
Select the input required and set the fixed gain using the volume control (the OFF setting does not disable the input but leaves the input gain subject to the volume control which is the default setting). When a source has a fixed input, the balance is always set to neutral. Press the Mode button to exit.
On/Off control menu
When going in/out of Standby mode the 840A can automatically turn on
Manufactured in an
ISO9002 approved facility
On Power Off | Control Bus | IR Emitter | |||
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| Output Line |
Left | Left |
Right | Right |
Line Output
640T V2.0
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| Designed in London, England |
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| azur 640T DAB/FM Tuner V2.0 |
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| Digital Outputs |
| Ohms 50 |
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| Power Rating: 230V AC ~ 50Hz | Input |
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| Max Power Consumption: 15W | Aerial |
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| Toslink | S/P DIF | Input |
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| 50 Ohms |
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and off other connected Cambridge Audio Azur models that have control bus sockets. For this feature to work the units must be connected together (see diagram) by RCA/phono leads. The sockets are colour- coded orange on the rear panels of compatible Azur models. Loop out from the 840A Control Bus Out to the Control Bus In on another Azur model (e.g. 840C). Continue the chain to other Azur models if required.
Power
On | Off |
Mains Voltage Selector Switch
115V/230V AC~50/60Hz
Power AC 
N2409
azur 840C Upsampling Compact Disc Player
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Max Power Consumption: 40W | Designed in London, England |
Caution Risk of electric shock. Do not open.
Avis Risque de choc electrique. Ne pas ouvrir.
Achtung Vorm öffnen des gërates. Netzstecker ziehen.
| IR Emitter | Control Bus | Digital Outputs | Digital Input 1 | Digital Input 2 | ||||
RS232C | In | In | Out | S/P DIF | Toslink | S/P DIF | Toslink | S/P DIF | Toslink |
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| Optical | Optical | Optical | |||
840C
Unbalanced Audio Out | Balanced Audio Out | GND | ||
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Left | Left |
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Class 1 Laser Product |
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Luokan 1 Laserplaite |
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Klass 1 Laserapparat |
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Right | Right |
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LeftRight
Manufactured in an
ISO9002 approved facility
Now while the 840A is on press and hold the Standby/On button until ON/OFF CTR appears on the display:
Standby / On
Volume
Power
Designed in London, England
On | Off | azur 840A Class XD™ Integrated Amplifier |
www.cambridge-audio.com Power Rating: 230V AC ~ 50Hz
Max Power Consumption: 800W
Manufactured in an ISO9002 approved facility
Power AC 
Caution Risk of electric shock. Do not open.
Avis Risque de choc electrique. Ne pas ouvrir.
Achtung Vorm öffnen des gërates. Netzstecker ziehen.
N2409
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Right
Right
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Right
Right
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A
A
Loudspeaker Terminals
Impedance 4 - 8 ohms
B
B
840A
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| Input 1 Balanced Audio | GND | |||
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| Keypad 1 | IR1 | IR3 |
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Left | IR Emitter | Control Bus |
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_ | In | In | Out | RS232C | PSU |
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| Keypad 2 | IR2 | IR4 |
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| Out Preamp | Out Tape | In Tape | 7 Input | 6 Input | 5 Input | 4 Input | 3 Input | 2 Input | 1 Input |
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Left |
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Left |
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| Preamp Out | Tape Out | Tape In | Input 7 | Input 6 | Input 5 | Input 4 | Input 3 | Input 2 | Input 1 |
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Azur Class XD integrated amplifier 17
