AMC MA 120 Manual do utilizador - Página 6
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Functions description
Front panel:
1. XLR INPUTS LEVEL CONTROL
These rotary knobs are for adjusting volume level of the XLR inputs. First four inputs can be used as
balanced line level as well as microphone level inputs. The phantom power can be activated for these
inputs separately in rear panel. The input gain selector is located in the rear panel too.
2. AUX INPUTS LEVEL CONTROL
These rotary knobs are for adjusting volume level of the AUX input.
3. TONE CONTROL
The separate tone controls provide attenuation of bass and treble response. The flat position is obtained
when the knobs are set to middle position. Turn bass control knob (BASS) and treble tone control knob
(TREBLE), respectively, clockwise to raise tone level by approximately +10 dB; turn counterclockwise to
lower tone level by approximately -10 dB.
4. MASTER VOLUME
This potentiometer is designed to adjust audio level in the main output.
5. OUTPUT LEVEL INDICATION
This is level indicator of the master output. If the red LED indicator starts lighting continuously the output
is distorted. In this case, decrease the sound volume by master volume control.
6. POWER INDICATOR
This LED indicates status of the power. The LED lights up if the amplifier is powered.
7. POWER SWITCH
Use this switch to power on or off the amplifier. The LED in the front panel lights up if the amplifier is
powered.
Rear panel:
1. POWER CONNECTOR AND AC FUSE
Power connector is designed for main powers connecting to amplifier. This connector is combined with
fuse holder and 2.5A 250V fuse for MA 120 and 1.6A 250V fuse for MA 60 amplifiers.
2. OUTPUT AND +24V DC TERMINAL
24V DC terminal is designed to power up the amplifier when the main power is unavailable. Use only
DC 24V power supply or batteries and take attention to polarity during the wiring. Output terminal is
designed to connect audio line to amplifier. There are available 4 types of output: low impedance 4 Ω
output, 25 V, 70 V and 100 V outputs for audio line. Please find some connection examples below in this
user manual.
3. REC OUTPUT
This is line level stereo RCA output to connect audio recording equipment.
4. AUX INPUT
Stereo RCA input with selectable sensitivity. There is a possibility to connect the line level audio, input gain
can be adjusted by using AUX input gain selector.