Ashly mXa-1502 Operating Manual page 22

mXa-1502 • Operating Manual
Crossover
(output channels only)
Crossover blocks can be placed on both
speaker and Aux output channels. A high-pass
and low-pass filter type and frequency get
applied to each crossover block to band-limit
the signal for that output.
All outputs populated with a crossover block
are shown combined on screen for clear visual
representation of crossover settings. Select
any of the four outputs to edit their filter
parameters.
Filter types can be selected to match the
acoustic response of your loudspeaker system.
Consult the loudspeaker manufacturer for
their recommended crossover filter types and
frequencies.
Ashly AquaControl™ Software
Available Filter Types:
Butterworth: Butterworth filters have a
maximally flat magnitude response and
sharpest transition to the stop-band, and are
available in 1st through 8th order filters (6, 12,
18, 24, 30, 36, 42, 48dB/octave).
Linkwitz: Linkwitz-Riley filters exhibit flat
combined on-axis magnitude response, and
are available in 2nd, 4th, 6th, and 8th order
filters(12, 24, 36, 48dB/octave).
Bessel: Bessel filters have a maximally flat
phase response, and are available in 2nd, 3rd,
4th, 5th, 6th, 7th, and 8th order filters (12, 18,
24, 30, 36, 42, 48dB/octave).
Linkwitz Notch: Linkwitz-Notch filters exhibit fast
rolloff with ripple in the stopband, and have flat
combined on-axis magnitude response. They are
available as 4th and 8th order (24, 48dB/octave).
Combined
Response at
Crossover
Frequency
Filter Type
Order (dB)
Butterworth
1st 0.0
2nd 3.0
3rd 0.0
4th 3.0
5th 0.0
6th 3.0
7th 0.0
8th 3.0
Linkwitz 2nd 0.0
4th 0.0
6th 0.0
8th 0.0
Bessel 2nd 2.7
3rd 2.9
4th 1.7
5th 1.1
6th 2.2
7th 2.9
8th 3.0
Linkwitz Notch 4th 0.0
8th 0.0
*Inverted outputs may require polarity change using gain
block to prevent undesired notch at crossover point.
Polarity
normal
*inverted
normal
normal
normal
*inverted
normal
normal
*inverted
normal
*inverted
normal
*inverted
*inverted
*inverted
normal
normal
normal
normal
normal
normal
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