10. Setup Procedure : Mic Input Modules
Begin with Input 1. Make sure all Channel Volume controls are off. Set the Master Volume at approximately one
o'clock. Maximum signal to noise is achieved with input volumes set between one o'clock and four o'clock. Set
Master Volume so that as many input volumes as possible can be set at optimum, keeping in mind desired overall
acoustic level.
Raise the volume on the channel a moderate amount, and change the Master Volume as necessary until you can
hear the signal. If necessary, change the module's Gain.
Because each individual channel senses input level in order to operate automatically, use the Low Cut filters on
M-Series modules. Low Cut filtering eliminates stray low frequency energy. Quality microphones pick up this
energy, which has noting to do with intelligibility. The AX-1000A has circuitry which reduces triggering via low
frequencies, yet Low-Cut filters on modules can further reduce false gating.
Turn the Channel Volume on Input 1 off. Continue setting the input modules for all channels.
11. Setup Procedure : Mic Channels
Now you will set the channel volume controls to the maximum gain before feedback on all microphone inputs.
Begin with all channel volume controls off. First:
Make sure that the NOM Attenuation control is set to the detent (10logNOM).
Make sure that no muting functions are engaged.
Make sure that the Off-Attenuation control is set to maximum attenuation on each channel.
Make sure that the Threshold Control is at maximum sensitivity, (full counter-clockwise)
Have someone talk into the first microphone in the same manner in which it will be utilized. Slowly increase the
gain with the Channel Volume control until feedback is heard. Decrease the gain slightly until the ringing
disappears. Log or mark this setting and turn the channel volume off.
Repeat this procedure with every other microphone. You may log or mark the maximum positions; each channel's
gain should not be increased beyond this maximum point, and the Master Volume should not be increased either.
Always mix by decreasing these level to balance the volume of individual inputs.
After volume has been adjusted, raise each channel's threshold so it will gate on reliably, yet not be false-triggered
by typical ambient noise.
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