Madrigal Imaging N380S ユーザーズマニュアル

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The majority of time you spend with your Nº380S will be spent in the 

mode. In this mode, the display indicates the name of the input you have se-
lected and the listening volume (in decibels). The output control acts as a vol-
ume knob, increasing or decreasing the volume in 0.1 dB increments above 39.0
(with gradually increasing increments below this low level). The 

buttons select the source to be listened to at any point in time. In short, in the

mode, the Nº380S acts precisely as you would expect a preamplifier to

act.

There are several refinements which may not be immediately apparent to the ca-
sual user, however. When turned quickly by hand, the effect of the 

will accelerate (i.e., yield a greater change per revolution of the knob) so as to
reach your preferred volume more quickly. Conversely, when the knob is turned
slowly, the volume changes at maximum resolution to facilitate fine adjustments
and precise level control (0.1 dB through most of the range).

However, if the volume knob is spun quickly (as though it were a flywheel), the
rate of change will decrease again. This design helps avoid accidental bumps of
the preamplifier’s Output Level knob sending potentially dangerous signal levels
to your loudspeakers.

Lastly, the corresponding buttons on the 

behave in a similar fash-

ion when in the 

mode. If the 

buttons are held for more than

approximately 1.5 seconds, the Nº380S infers that you would like to change vol-
ume more quickly and accelerates the volume change.

While in the 

mode, the 

buttons choose the source which

will be heard over the loudspeakers.

When you wish to send a signal out to be recorded, push the 

button once

to enter the 

mode. In this mode, the display indicates “

” on

the left side and the name of the input currently being supplied to the Record
Outputs on the right. An example is given below:

To select a different input for recording, simply press the appropriate Input Selec-
tion button while in this mode. Note that the Nº380S will not allow a recording
device to serve as its own source while monitoring itself, as this would allow po-
tentially dangerous feedback to be reproduced by the loudspeakers. (See “pro-
gramming input names” for more details.)