Axxent AMV-7240 Instruções de utilização - Página 4

Procurar online ou descarregar pdf Instruções de utilização para Amplificador Axxent AMV-7240. Axxent AMV-7240 5 páginas. Automatic-mixer/amplifier

4. AUX settings

Choose the input signal AUX 1 or AUX 2 by depressing the equivalent push button on the front panel (section AUX

CONTROL). The trimmers GAIN AUX lets you set the sensitivity so, that no limiting of the signal occurs (VOLUME 4),

verified by the LIMIT LED in the master section. Set the desired volume with the rotary knob VOLUME (on the front

panel in the section AUX CONTROL). The sound (tonal characteristics) can be set and optimised by the potentio-

meters LOW and High accordingly.

5. Ducking (automatic signal attenuation)

Connect the signal to the AUX input and set the trimmer DUCK AMPL to centre position. Now test this function by

speaking into the microphone at the MIC/LINE input. The DUCK GATE threshold may be adjusted at the same named

Trimmer, so that the AUX signal is attenuated to your preference.

6. Parametric equalizer

The parametric equalizer is helpful for solving problems in venues with difficult acoustic environment and to simulta-

niously optimise speech for maximum intelligibility. Feedback prone frequencies lowering the threshold for onset of

feedback are filtered out of the audio spectrum (reflected signals are time delayed). The EQ is simply activated by

EQ ON.

The built in equalizer covers the total audio spectrum. For ease of use the EQ is split into 4 overlapping sections: F1

= 20...9 000 Hz, F2 = 65...3 000 Hz, F3 = 170...7 000 Hz and F4 = 450...20 000 Hz. The (critical) frequency is selected

by the trimmer FREQ, the bandwidth Q = 1...12 with the trimmer BAND and the amplitude range with the trimmer

GAIN. The sections are overlapping in order to filter out a relative small and steep frequency range (notch-filter).

7. Amplifier output level

When setting up the system in venues with high acoustical damping factor, where high output power can be utilized,

set the rotary pot VOLUME in the MASTER area on the front panel so, that no permanent limiting of the output signal

occur (watch the LIMIT LED, which also can indicate amplifier overload).

Other amplifier functions

•

Microphone signals may be recorded at the RECORD outputs, without being influenced by the volume setting.

•

Parallel operation of 2 amplifiers is also possible in the AUTOMATIC Mixing mode. In this case the PARALLEL

connectors of both amps are used for both amplifiers. The input of amplifier 1 with the output of amplifier 2

and vice versa.

•

An external effect device (FX), such as Echo, may be looped into the signal path of the amplifier via the parallel

connectors between INPUT and OUTPUT .

•

An additional power amplifier may be connected to the output of the AMV-7240. The kind of signal proces-

sing in our mixer/amplifier is determined by the jumper OUTPUT. In position EQ the signal is routed through

the equalizer and the setting for the total gain. In the position VOL the signal is routed through the sum level

control but not through the EQ. In the SUM position the signal will neither be routed through any of the be

fore mentioned sections.

9. Output power

Output power is available at the transformer taps 100 V, 75 V and 50 V.

The choice of the amplifier configuration is done by switching taps on the output transformer.

Details of the controls on the PCBs

see next page.