Filter
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The f parameter (frequency) sets the x-over Lo-Pass filter’s cutoff frequency. The corresponding Hi-Pass
filter should be set to the same cutoff frequency.
Pol defines the polarity of the corresponding channel. Depending on the characteristic of the frequency
crossover filter, inverting the polarity of a channel’s signal may become necessary; i. e.: set a negative
polarity. Some filter types generate phase responses that lead to significant level reduction in the overall
audio signal at the crossover frequency. This negative effect can be eliminated by inverting the polarity
of the output that carries the low-frequency signal.
The following table provides you with a list of all filter types for which a channel’s signal has to be inverted
for the corresponding filter pair.
In the Standard Edit Mode, depending on the selected type of filter, channel inversion is automatically
set.
X-OVER: f = 1kHz Type = Butterworth 12dB, Butterworth 24
X-OVER: f = 1kHz Type = Bessel 12dB, Bessel 24d
X-OVER: f = 1kHz Type = Linkwitz-Riley 12dB, Linkwitz-Riley 24dB
Bessel 12 dB
Butterworth 12 dB
Bessel 18 dB
Bessel 24 dB
PARAMETERS
8-10