Bedienungsanleitung Naim NAP 250 DR (Seite 31 von 44) (Englisch)

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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.

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