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Fixed level inputs
Any input of the 851A 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 851A 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 851A
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 851A and connected stereo sources
as normal for best possible sound quality. For surround sound, select
the fixed level input you have chosen on the 851A and now use the
AV receiver to control the volume, select connected surround sound
sources etc. You may wish to re-name the fixed level input as "A/V mode"
or similar on the 851A. Make connections as below, the left and right
preamp outputs of the AV receiver connect to the fixed gain input chosen
on the 851A. As the gain can be fixed to any value it is easy to match the
level of the 851A to that of the other AV channels.
L
C
851A
SW
AV receiver
SL
SB
To set a fixed volume for a source, select FIXED INP in the System
Configure menu:
Mode
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.
R
Stereo
sources
Surround
sound
sources
SR
Volume
On/Off control menu
When going in/out of Standby mode the 851A 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
colourcoded orange on the rear panels of compatible Azur models. Loop
out from the 851A Control Bus Out to the Control Bus In on another Azur
model (e.g. 851C). Continue the chain to other Azur models if required.
Now while the 851A is on press and hold the Standby/On button until
ON/OFF CTR appears on the display:
Standby / On
Select the connected Azur models by pressing the appropriate input
select button. For example, CA XXXC for an Azur CD player (851C), CA
XXXBD for an Azur Blu-ray 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.
azur
851A
650T
851C
851A
Volume
11
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