FLX-E Operations Manual Rev F
Page 18
Table of Contents
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change within one period (the 360-degree cycle of the lowest fundamental frequency) of the sound's
waveform.
Stewart Audio strongly recommends enabling the output limiter blocks to prevent damage to the
speakers and to avoid overdriving the amplifier.
7.2.4.4
Filter Blocks
The Filter block is used to configure the parametric filters available on each channel. Each channel has 3
filters available on the input side (pre-mixer) and 6 filters on the output side (post-mixer). These
parametric filters alter the frequency response of the audio signal using configurable parameters. These
filters can be used to provide cleaner sounding audio, reduce feedback, and to protect speakers. There are
6 different parametric filter types available, low pass, high pass, low shelf, high shelf, peak, and notch. The
filter type is selected via the pull down menu below the frequency response graphic.
Once a filter type is selected, it is configured by entering the filter parameters in the text boxes below the
filter type box. This interface is convenient when accurate configuration of gain or center frequency is
required for matching speaker specifications. The number and type of parameters will depend on the type
of filter selected. Alternatively, the filter response is configured by selecting the filter control points on the
frequency response graphic, dragging them to the desired position, and dropping them. See “Using the
Graphical Filter Interface” below.
3 channel filter designer interface
Filter Type
is a pulldown menu that selects the filter type or disables the filter (selecting Not Used).
Bypass
is a button that enables or disables the filter bypass. When bypassed, the button will turn red and
the filter response curve on the graphical interface will become dotted and no longer be included in the
cascaded filter.
