Amplifier setup continued
Volume display
Mode
Volume
To change the volume display from decibels
Input gain trim
The relative levels of the inputs can be adjusted by gain trim. This allows each to be adjusted so that each sounds the same in terms of average loudness when you switch between them. Pick the loudest sounding source and trim its level until it matches the average perceived level of the others. Repeat this process if other sources also stand out as louder than the average.
Mode
Volume
To set the input gain trim for each source, select INP TRIM in the System Configure menu. Select the input required and use the volume control to set the gain between 0 and
Fixed level inputs
Any input of the 740A is able to be set for fixed gain. Whenever this input is selected the gain will automatically go to this value and will not be adjustable by the volume control. This feature allows the 740A to be effectively used as a stereo power amplifier (for that selected input only). For example, as well as operating as a pure stereo amplifier, the 740A can provide the amplification for the front left and right channels of a surround sound setup with an AV receiver providing amplification for the other channels and controlling the overall system volume.
When listening in stereo use the 740A and connected stereo sources as normal for best possible sound quality. For surround sound, select the fixed level input you have chosen on the 740A and now use the AV receiver to control the volume, select connected surround sound sources etc. You may wish to
On/Off control menu
When going in/out of Standby mode the 740A can automatically turn on 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 740A Control Bus Out to the Control Bus In on another Azur model (e.g. 740C). Continue the chain to other Azur models if required.
640T V2.0
Manufactured in an
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Caution | On Power Off | Control Bus | IR Emitter |
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| Digital Outputs | azur 640T DAB/FM Tuner V2.0 | Ohms 50 | |
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| In | Out | In | Left | Left |
| Power Rating: 230V AC ~ 50Hz | Aerial |
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| Max Power Consumption: 15W |
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| Line Output | Toslink | S/P DIF |
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740C |
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part 15 of FCC rules | On | Off |
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Caution | Compact Disc Player |
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| IR Emitter | Control Bus | Digital Outputs | Digital Inputs 1 | Digital Inputs 2 | Left | Class 1 Laser Product | ||||
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| In | In | Out | S/P DIF | Toslink | S/P DIF | Toslink | S/P DIF | Toslink | Line Output |
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| Out Pre | In Tape/Rec | 2 Out Tape/Rec | 1 Out Tape/Rec | 5 Input | 4 Input | 3 Input | 2 Input | 1 Input |
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| Impedance 4 - 8 ohms one pair, 6 - 8 ohms per pair if two pairs |
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| Pre Out | Tape/Rec In | Tape/Rec Out 2 | Tape/Rec Out 1 | Input 5 | Input 4 | Input 3 | Input 2 | Input 1 | |
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| Please ensure that loudspeaker terminals are fully tightened |
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740A
Now while the 740A is on press and hold the Standby/On button until ON/OFF CTR appears on the display:
Standby/On
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.
L
SW
SL
C
740A
L R
AV receiver
SB
R
Stereo
sources
Surround
sound sources
SR
To set a fixed volume for a source, select FIXED INP in the System Configure menu:
Mode
Volume
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.
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