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E29
Preamplifier and Integrated Amplifier Operation
Note: The Unity Gain feature must be used with care. It
effectively by-passes the preamplifier volume and balance
controls leaving any signal connected to a Unity Gain
input to be passed to the power amplifier and speakers at
full volume. In order to reduce the potential for inadvertent
mishap, any subsequent modifications to input assignment
will automatically disable previously set up Unity Gain
inputs. Additionally, if an input is selected which has Unity
Gain enabled, the preamplifier volume and balance
handset functions will be disabled and their indicators will
turn off. This will be flagged by the volume or balance
indicators flashing if either handset function is operated.
28.3 Handset Volume and Balance Control
The remote handset volume and balance keys provide
some alternative control characteristics. A quick press and
release of a key will adjust by a preset “nudge”. A quick
press and release of a key followed by press and hold will
cause continual slow adjustment. Simple press and hold will
cause continual fast adjustment.
Note: The NAC 152 XS, Nait XS and Nait 5i do not
incorporate any facility for channel balance control.
28.4 Mute, Mono and Mon
Mute silences the output signal and can be selected by
pressing the front panel mute button. On preamplifiers
equipped with separate source and record sections Mute
can be selected independently for source and record.
Mute can also be selected from the handset.
Note: The Nait 5i does not incorporate any front panel
mute facility.
Some preamplifiers include a mon (mono) function that
sums the left and right channels. Mono can be selected by
pressing the front panel mon (NAC 552 mono) button. On
preamplifiers equipped with separate source and record
sections mono can be selected independently for source
and record. Mono can also be selected from the handset.
Note: The NAC 202, NAC 152 XS, Supernait, Nait XS and
Nait 5i do not incorporate any mono facility.
The NAC 202 incorporates a mon (“tape monitor”)
function. Pressing the mon button routes the tape, av or
aux 1 input signals to the preamplifier output while leaving
the input selection routed to the tape, av and aux 1
outputs. The mon function can also be selected from the
handset.
Note: Only the tape, av and aux 1 inputs (those that
incorporate outputs) can be selected when mon is
engaged. However, if one of these inputs carries the
source signal, that input will be unavailable for monitoring.
Note: As delivered the NAC 202 record mute function is
engaged. It can be disengaged by pressing the mute
button while mon is engaged. See Section 13.2
Note: The NAC 152 XS, Nait XS and Nait 5i do not
incorporate any front panel tape monitor facility.
28.5 Display
The preamplifier front panel button illumination can
be switched off by pressing the remote handset (in
preamplifier mode) disp function. Any subsequent handset
or front panel operation will temporarily restore the display.
A second operation of the disp function will restore the
display.
28.6 Switch-on
After switch-on, via the power amplifier or power supply
power button, the preamplifier will remain muted for 30
seconds while control systems and circuits stabilise. On
preamplifiers equipped with separate source and record
sections, only the source side will un-mute automatically
leaving the record side muted.
28.7 Remote Control
The remote handset supplied with the preamplifier
duplicates all configuration and control functions. See
Sections 29 and 30 for more information.
28.8 Defaults
To restore all programmable settings to the factory defaults
press and hold the remote handset disp key while the
preamplifier is in program mode. The preamplifier will exit
from program mode following this operation.
31


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