AMC MA 240 Посібник користувача - Сторінка 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. VENTILATION HOLES

To ensure proper amplifiers cooling leave these ventilation's holes unblocked. Blocked ventilation's holes

can be reason of amplifiers damage.

2. POWER CONNECTOR AND AC FUSE

Power connector is designed for main powers connecting to amplifier. This connector is combined with

fuse holder and 6.3A 250V fuse inside.

3. +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. 24V DC Current - 20A.

4. OUTPUT TERMINAL

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.

5. PREAMPLIFIER OUTPUT

This is line level output directly from device preamplifier. Preamplifier output and amplifier input are

designed to insert signal processor such as equalizer or limiter.