Input (Source) connections
Inputs 1 and 2 on the 840E feature either unbalanced (phono/RCA) or balanced (XLR) connections. The 840E is designed to work at its highest performance when a balanced interconnect is used.
The diagrams below shows the 840E pre-amplifier connected to an Azur 840C CD player in unbalanced (Figure 1) and balanced (Figure 2) configurations. The 840E can also be connected to non Cambridge Audio sources with balanced outputs.
Balanced connections in an audio system are designed to reject electrical noise, from power wiring etc, and also the effects of noise currents flowing through ground connections. The basic principle of balanced interconnection is to get the signal you want by subtraction,
using a three-wire connection. One signal wire (the hot or in-phase) carries the normal signal, while other (the cold or phase-inverted) carries an inverted version. The balanced input senses the difference between the two lines to give the wanted signal. Any noise voltages that appear identically on both lines (these are called common-mode signals) are cancelled by the subtraction.
Make sure the Balanced/Unbalanced switch for Inputs 1 and 2 are set to the connection type you wish to use.
Figure 1: Unbalanced input | Figure 2: Balanced input |
840E | 840E |
Power
OnOff
CAUTION AVIS ACHTUNG
Power AC 
840C
| | | | | | | | Multi-Room | | Input 2 Balanced Audio | | Input 1 Balanced Audio | | | | |
| | | | | | | | Keypad 1 | IR1 | IR3 | | | | | | | | | |
Designed in London, England | | Trigger | IR Emitter | Control Bus | RS232C | | | | | | | | | | | Power | Off | Designed in London, England |
Power Rating: 230V AC ~ 50Hz | In | Out/Thru | In | In | Out | PSU | | | | | | | | | | On | Power Rating: 230V AC ~ 50Hz |
azur 840E Pre-Amplifier | | | | | | | | | | | | | azur 840E Pre-Amplifier |
| | | | | | | In | | | | | | | | | | | | |
Max Power Consumption: 36W | | | | | | | | | | | | | | | | | | | Max Power Consumption: 36W |
www.cambridge-audio.com | | | | | | | | | | | | | | | | | CAUTION AVIS | ACHTUNG | www.cambridge-audio.com |
| | | | | | | | Keypad 2 | IR2 | IR4 | Right | Left | | Right | Left | Balanced | |
| Out Pre | | Balanced Pre Out | | Flat / 200Hz L.P. | 2 Out Rec | 1 Out Rec | In Rec | 7 Input | 6 Input | 5 Input | 4 Input | 3 Input | 2 Input | 1 Input | | | | |
Balanced
R | R | | | | R | | | | | | | | | | R | |
| | | | | | | | | | | | | | | Unbalanced | Power AC |
Manufactured | Pre Out | Right | Left | Sub Out | Rec Out 2 | Rec Out 1 | Rec In | Input 7 | Input 6 | Input 5 | Input 4 | Input 3 | Input 2 | Input 1 | Input 2 | Manufactured |
| | | | | | | | | | | | (Unbalanced) | (Unbalanced) | |
in an ISO9001 | | | | | | | | | | | | | | | | in an ISO9001 |
approved facility | | | | | | | | | | | | | | | | approved facility |
| | | | | Phono/RCA | | | | | | | | |
| | | 3098092 | | | | | | | | | | | | | |
| | Conforms to ANSI/UL STD 60065 | | | | | | | | | | | | | |
| | 7th Edition 2003 Rev 2006/03/20 | | | | | | | | | | | | | |
| | Certified to CAN/CSA STD C22.2 | | | | | | | | | | | | | |
| | | No. 60065-03 | | | | | | | | | | | | | |
840C
| | | | | | | | Multi-Room | | Input 2 Balanced Audio | |
| | | | | | | | Keypad 1 | IR1 | IR3 | | | |
Trigger | | IR Emitter | Control Bus | RS232C | | | | | | | |
In | Out/Thru | | In | In | Out | PSU | | | | | | |
| | | | | | | In | | | | | | |
| | | | | | | | Keypad 2 | IR2 | IR4 | Right | Left | |
Out Pre | | Balanced Pre Out | | Flat / 200Hz L.P. | 2 Out Rec | 1 Out Rec | In Rec | 7 Input | 6 Input | 5 Input | 4 Input | 3 Input |
L | L | | | | | L | | | | | | | |
R | R | | | | | R | | | | | | | |
Pre Out | | Right | Left | | Sub Out | Rec Out 2 | Rec Out 1 | Rec In | Input 7 | Input 6 | Input 5 | Input 4 | Input 3 |
XLR
3098092
Conforms to ANSI/UL STD 60065 7th Edition 2003 Rev 2006/03/20
Certified to CAN/CSA STD C22.2
No. 60065-03
Input 1 Balanced Audio
Balanced |
Unbalanced |
Input 1 |
Balanced |
| | R |
| | Unbalanced |
Input 2 | Input 1 | Input 2 |
(Unbalanced) | (Unbalanced) | |
Power syncing (On/Standby control)
When going in/out of Standby mode the Azur 840E pre-amplifier can (if desired) automatically control the 840W when connected via the Control Bus sockets (the Control Bus sockets are colour-coded orange on the rear panels of compatible Azur models). For this feature to work the units must be connected together by RCA/phono leads. No futher setup is necessary.
Connect the Control Bus Out from the 840E to the Control Bus In on the 840W. Continue the chain to other Azur models if it is required to sync more units (refer to the 840E’s own manual for more information as this requires some setup).
Note: The 840E features a Trigger Out which can alternatively be used to control the 840W’s Standby/On status if desired. Again, the procedure is simply to connect the two units together (using a 3.5mm to 3.5mm mono mini-jack lead in this case).
Control Bus is the recommended method when using an 840E and other Cambridge Audio equipment with Control Bus In/Out.
Trigger In/Out can be useful if the 840W (and indeed 840E) is desired to be controlled by other equipment that features trigger outputs (Custom install and/or Multi-Room Systems etc).
| | | Loudspeaker Terminals - Right | | |
| | | | Impedance 4 - 8 ohms | | |
| | | | | | Bridged |
| | | | | | only! |
| | | | Class 2 Wiring | | |
| | | Balanced Audio - Right | Unbalanced |
| | | Input | Loop Output | Audio - Right |
| | | | | | Input |
| | In | Loop | | | |
| | 1 = Ground | | | |
| | 2 = | | | | |
| | 3 = | | | | |
| | | | | Loop Output |
| Power | | Designed in London, England | | Trigger |
| | | azur 840E Pre-Amplifier | In | Out/Thru |
On | | Off | Power Rating: 230V AC ~ 50Hz | | |
| | | | |
| | | Max Power Consumption: 36W | | |
CAUTION | AVIS | ACHTUNG | www.cambridge-audio.com | | |
IMPORTANT!
Only change modes
when unit is off.
Refer to Manual for more information.
Stereo
Mono
Mono Mode
Bi-Amp
BridgedBridged
Use Left Input for Bridged / Bi-Amp operation.
Right
Input Type
Balanced
Unbalanced
IR Emitter
In
Designed in London, England
azur 840W Class XD Power Amplifier
www.cambridge-audio.com
Power Rating: 230V AC ~ 50Hz
Max Power Consumption: 1600W
CAUTION AVIS ACHTUNG
Control Bus | RS232C | |
In | Out | PSU |
| | | In |
In
Control Bus
Out
In
Trigger
Out/Thru
IR Emitter
In
Left
Input Type
Balanced
N1863
Unbalanced
AЯ46
Multi-Room
| Loudspeaker Terminals - Left |
| Impedance 4 - 8 ohms |
Bridged | | |
only! | | |
| Class 2 Wiring | |
Unbalanced | Balanced Audio - Left |
Audio - Left | Input | Loop Output |
Input | | |
In Loop
1 = Ground
2 =
3 =
Loop Output
Manufactured in an ISO9001 approved facility
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
1)This device may not cause harmful interference
2)This device must accept any interference, including interference that may cause undesired operation
Input 2 Balanced Audio | Input 1 Balanced Audio |
IR3 | GND |
840W
840E
Balanced Pre Out
Flat / 200Hz L.P. | 2 Out Rec | 1 Out Rec |
Keypad 2 | IR2 | IR4 | | Right | Left | Right | Left | Balanced |
In Rec | 7 Input | 6 Input | 5 Input | 4 Input | 3 Input | 2 Input | 1 Input | |
L | L | | | | L | | | | | | | | | L | Unbalanced |
| | | | | | | | | | | | | | | Input 1 |
| | | | | | | | | | | | | | | Balanced |
R | R | | | | R | | | | | | | | | R | |
Power AC | GND | | | | | | | | | | | | | | Unbalanced |
Manufactured | Pre Out | Right | Left | Sub Out | Rec Out 2 | Rec Out 1 | Rec In | Input 7 | Input 6 | Input 5 | Input 4 | Input 3 | Input 2 | Input 1 | Input 2 |
| | | | | | | | | | | | (Unbalanced) | (Unbalanced) | |
in an ISO9001 | | | | | | | | | | | | | | | |
approved facility | | This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: 1) This device may not cause harmful interference; 2) This device must accept any interference, including interference that may cause undesired operation. | | | | |