Ecler ECLERNET MANAGER - Manual (Page 169)

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9.3.4. PARAMETRIC EQ
This section groups the eight parametric filters available per channel, very useful for a precise correction
of the frequency response.
Available parameters are described below (the parameters are always displayed for one of the 8 filters,
the one with white background for its number indicator, as filter #2 in the image):
 ON/OFF: turns on/off the parametric EQ, affecting all filters from this section. When it is OFF (top
left button greyed out), there is no filter processing (all filters are bypassed). In the opposite case
(green button), operation is determined by the other parameters.
 FILTER TYPE: type of filter used. You can select one of the following filter types (adjustable
controls for each filter type are shown between brackets):

Bypass: filter not used.
 Parametric EQ (FREQUENCY, GAIN, Q): classic parametric equalizer filter with
adjustable central frequency (between 20Hz and 20kHz), central frequency gain or
attenuation (between +12dB and 60dB) and bandwidth (1/Q, Q between 0.3 and 200).
 Low-Shelf and High-Shelf with a 6 or 12 dB/oct slope (FREQUENCY, GAIN): shelving
type filters with adjustable cut-off frequency (between 20Hz and 20kHz) and gain or
attenuation (between +12dB and –60dB).
 Low-Pass and High-Pass with a 6 or 12 dB/oct slope (FREQUENCY): these are low-pass
and high-pass filters with adjustable cut-off frequency (between 20Hz and 20kHz).
 All-Pass order 1 and 2 (FREQUENCY, Q in order 2): all-pass filters that do not affect the
signal amplitude, but the phase at certain frequencies (in contrast with delay, which
changes phase at all frequencies). This type of filter is mainly used to compensate for
phase errors in speakers or other causes, such as phase shifts introduced by the
crossover.
It is recommended to use the graphical representation of the channel EQ to help you during the
adjustment (Show/Hide Graph icon in the lower right corner of the EclerNet Manager application
window):