Axxent AMV-7240 Instrukcja obsługi - Strona 3

Przeglądaj online lub pobierz pdf Instrukcja obsługi dla Wzmacniacz Axxent AMV-7240. Axxent AMV-7240 5 stron. Automatic-mixer/amplifier

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1. Basic settings of the amplifier (level/microphone input sensitivity)

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Set the rotary knob VOLUME

J14, AUTO ON on the basic printed circuit board (PCB) – this disables the automatic mixing function.

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Set the level of MIC/LINE 1 on the front panel

Adjust the microphone input sensitivity with the trimmer GAIN on the PCB, so that you obtain maximum

sensitivity (gain) before acoustical feedback occurs.

Set the microphone equalizer HIGH, MID, LOW (trimmer on PCB) to the required sound under consideration

of the microphone sound characteristic and room acoustics. If necessary adjust the level to insure a safety

margin before the onset of feedback.

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Repeat the settings mentioned before for all inputs with connected microphones. To activate phantom

powering for condenser microphones set the jumper PHAN on the PCB accordingly.

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The trimmer COMPR (on the mic input PCB) allows for adjusting the threshold for onset of signal compression.

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The NOISEGATE trimmer may be adjusted for the desired threshold of the gate (gain reduction of 10 dB).

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A subsonic filter (high pass) may be activated with the jumper SUBBASS ON (for example to improve

intelligibility of speech in a noisy surrounding).

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The microphone inputs may also be used as link inputs. Deactivating of automatic mixing and compression

is done by depressing MIX OFF for the corresponding input on the front panel.

2. Setting/adjusting automatic mixing

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Set the trimmer J14, AUTO ON, MIX GATE fully counterclockwise and all microphone inputs to max. Rotate the

trimmer carefully and slowly clockwise to the point that no word of the speech is lost and the corresponding

microphone opens immediately when the speaker starts talking. When speaking to one of the microphones

(green LED ACTIVE) all other microphones should not be activated by the acoustic surrounding. Activated

microphones are recognized by the corresponding green LED. For most applications the centre setting of

the trimmer is a good point to start.

3. Setting/adjusting volume

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In normal operation the MIC/LINE potentiometers are set to maximum. Unused inputs are set to minimum.

For these inputs the MIX OFF switch should be activated in order not to influence automatic mixing. The overall

volume is set with the rotary potentiometer VOLUME. Carefully observe onset of acoustical feedback.

In venues with high sound reflections (poorly damped) start with a setting of the knob to position 4. In instal-

lations with improved (higher damped) acoustical conditions the total useable volume may be increased –

but again: watch the danger of acoustical feedback.

Non authorized persons should not have access to the internal settings.

in the master section on the front panel to 4. Open the bridge jumper

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to max and the other inputs (2 - 5) to min.

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AMV-7240

Automatic-Mixer/Amplifier

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