Mackie QUAD EQ, Owner'S Manual

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QUAD EQ
Quad EQ
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Owner’s Manual
Owner’
s Manual
15. NOISE button
1. Press a CHANNEL SELECT Button (A, B, C or
D) and the NOISE button, then several inter-
esting things will happen:
• The audio input to the currently-selected chan-
nel is interrupted.
• Pink noise appears at the output of the Quad
EQ to play in your speaker system.
• Press RTA if you want to see this noise.
• If you have stereo-linked channels, then the
noise will appear in both channels.
• The microphone input is still live, allowing you
to use the microphone to sample the noise play-
ing in your system. (Press Mic to do this.)
• If the audience is present, you may be tarred
and feathered (unless the noise is an improve-
ment over the band).
The default level is off, and it needs to be edited to
adjust the level of the noise (see below). Once it has
been set to a suitable level, and you follow the first step
to turn on the noise, it will turn on at the last level it
was set to.
When the noise is playing, you can use the measure-
ment microphone to set up, analyze, and equalize your
system. You will often have NOISE and MIC selected at
the same time. The response from your microphone will
show the effect of room reflections, standing waves, and
the output characteristics of your speakers, boosting
and cutting the level across the frequency band. You can
then use the Filter buttons to adjust the EQ of problem
areas. For example, if a large level boost is present in a
certain frequency range, this area will be more suscept-
able to feedback. See details of the MIC button for more
information about using the measurement microphone.