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POWER Switch
turns all AC
power completely
ON or OFF
VOLUME Control
adjusts the listening
volume level of the
Loudspeakers and
Headphones
MONO Push-button
combines left and right
stereo signals to mono
at the Headphones and
PREAMP OUTPUTS
1&2
MUTE Push-button
mutes the listening
audio
STANDBY/ON
Push-button turns
the MA2275 ON
or OFF (Standby)
HEADPHONES
jack accepts dy-
namic headphones
IR Sensor receives
commands from a
remote control
TREBLE Control provides
12dB boost or cut with a
flat center position
BASS Control pro-
vides 12dB boost or
cut with a flat center
position
The BALANCE
Control adjusts the
relative volume bal-
ance between chan-
nels
METER indicates the
Power Output of the Left
Channel Amplifier
METER Control selects
the display modes of the
Power Output Meter
METER indicates the
Power Output of the Right
Channel Amplifier
Front Panel Controls, Displays, Push-Buttons and Switch
TONE BYPASS Push-button
allows the audio signal to to-
tally bypass the Tone Control
Circuitry
INPUT SELECTOR
Control selects the pro-
gram signals that are
listened to and are
available for recording
REC MONITOR Push-but-
ton with indicator, allows
listening to the tape play-
back while the recording is
in process
TUBE WARMUP
indicates when the
audio output is muted
until the tubes reach
operating temperature