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USING YO UR SPIRIT LIVE 4 CONSOLE
The final sound from your P.A. system can only ever be as
good as the quality of the source signal. Just as you need to
become familiar with the control functions of your mixer, so
you must recognise the importance of correct choice of inputs,
microphone placement and input channel settings. However,
no amount of careful setting up can take account of the
spontaneity and unpredictability of live performance and the
mixer must be set up to provide ‘spare’ control range to
compensate for changing microphone position and the
absorption effect of a large audience (different acoustic
characteristics from sound check to show).
The front panel drawing inside the rear cover shows
typical initial control positions which may be found a
useful guide to setting up the mixer for the first time.
Initia l Set Up
The diagram on page 5 demonstrated how the matching of
input gain to the signal source was crucial to avoid distortion
at one extreme and excessive noise at the other. Set up
individual input channel as follows:
• Connect the input required (microphone, keyboard etc.)
Note: Phantom powered mics should be connected before
the +48V is switched on.
• Set Master faders at 0, input faders at 0, and set power
amplifier levels to about 70%.
• Provide a typical performance level signal and press the
PFL button on the particular channel, monitoring the level
on the right-hand meter.
• Adjust the input gain until the meter is just reaching the
amber section (0dB) at a typical maximum source level.
This allows sufficient headroom to accommodate peaks
and establishes the maximum level for normal operation
(but see note below).
• Repeat this procedure on other channels as required. As
more channels are added to the mix, the meters may move
into the red section. Adjust the overall level using the
Master Faders if necessary.
Pa g e 20