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10
3 MODE INDICATORS
Three LEDs give visual confirmation of the operational mode the Nº380S is
in at any moment. When the balance control of the Nº380S is “off-center,”
the balance LED remains lit as a reminder, in addition to other mode indi-
cators
that might be on to indicate either monitor or record select.
4 MODE BUTTON
Cycles among the three primary operational modes of the Nº380S: monitor
(the source being listened to); record select (the source being provided to
the Record Outputs); and balance (the relative volumes of the Left and
Right channels). Confirmation of these operating modes is given by the
mode indicators below the alphanumeric display. (See 3, above.)
5 INVERTED POLARITY INDICATOR
The polarity (sometimes inaccurately called “absolute phase”) of the output
of the Nº380S may be inverted via the Nº380S remote control, in which
case this LED will light as confirmation. A second press of the polarity but-
ton on the remote control will restore the polarity of the output to its origi-
nal, non-inverted state.
6 VOLUME KNOB
This control is normally used to adjust the listening volume, and does not
effect the level of the signal being sent to the Record Outputs. When in
balance mode, this knob is used to vary the relative output of the Left and
Right channels. It is also used during setup for various adjustments; see
“Setup and Installation.”
7 MONO BUTTON
This button toggles between stereo and mono operation. When in mono, it
activates circuitry which combines left and right input signals, and sends the
resulting monophonic signal to both left and right outputs. This circuit is
particularly useful when listening to older, monophonic source material,
since significant noise reduction is often realized by listening to mono re-
cordings in mono.
8 SOURCE SELECTOR BUTTONS
Inputs 1–6 are selected by pressing their respective buttons. When in the
monitor mode, pressing one of these buttons will select the source to be
heard (i.e., sent to the main outputs); when in record select mode, pressing
one of these buttons will select the source to be recorded (i.e., sent to the
record outputs).
9 MUTE BUTTON
Pressing the mute button will reduce the main output level of the preampli-
fier by a user-modifiable amount, ranging from 1 to 60 decibels. Pressing
the Mute button a second time without adjusting the volume will return it
to its previous setting.