Setting Hold Time; Balancing Microphone Sensitivities; Setting Line Levels; Activating Ducking Mode - AKG AS 4+3 Mode D'emploi

4 Operating Instructions
4.1.3 Balancing Microphone
Sensitivities
Refer to Fig. 11.

4.2 Setting Line Levels

Refer to Fig. 3.

4.3 Activating Ducking Mode

Refer to Fig. 8.
4.3.1. Setting Ducking
Attenuation
Refer to Fig. 8.

4.4 Output Level and Equalizer

Refer to Fig. 4.

4.5 NOM Attenuation

5 Cleaning
Important!
14
Auto mode allows you to compensate for the differences in sensitivity between two or more microphones:
1. Set up the input channel for each microphone referring to section 4.1.1 above.
2. Switch each microphone channel to Auto mode by setting the appropriate PERMANENT ON switch
to its upper position.
3. Place all microphones at exactly the same distance from a talker.
4. Ask the talker to produce a sustained sound, for instance, a whistle, and make it grow louder
gradually.
5. Set the appropriate GAIN controls such that all microphone channels involved will open simulta-
neously (at the same sound pressure level).
1. Set the LEVEL control of the LINE input channel for each audio source to the desired volume level.
1. Set the DUCKING MASTER switch in the CONTROL MODE section on the rear panel to its lower
position.
As soon as MIC 1 INPUT comes on, the volume level of all other microphone and line inputs will be
attenuated automatically.
1. Set the DUCKING ATTENUATION trimmer pot to the desired attenuation value. The control ranges
from 20 dB (full CCW - high attenuation) to 9 dB (full CW - low atenuation).
1. Use the OUTPUT LEVEL control (in a daisy-chain configuration, on the last mixer) to set the main out-
put level of the mixer (the combined output signal level of all mixers).
2. Set BASS and TREBLE to 12 o'clock. In this position, the equalizer will not change the output signal.
To cut the high or low frequencies, turn TREBLE or BASS CCW.
To boost the high or low frequencies, turn TREBLE or BASS CW.
The AS 4+3 will automatically attenuate the output level by an amount depending on the Number of Open
Microphones (hence "NOM attenuation"). Every time the number of open microphone doubles, system
gain is reduced by approx. 2 dB. (In a daisy-chain configuration, it makes no difference on which mixer
a channel comes on.) As a result, the risk of feedback (howling) will hardly grow even if the number of
open microphones changes.
1. Disconnect the AC adapter from the power outlet.
2. Use a cloth moistened (not wet!) with water to clean the surfaces of the mixer.
Never use caustic or scouring cleaners or cleaning agents containing alcohol o solvents since
these may damage the enamel or plastic parts.