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Allen & Heath 12 XONE:DB4 User Guide
FILTERS
2
3
1
The XONE:DB4 is equipped with a dual, swept filter system, that emulates the analogue filters that
have been a key feature on most XONE products. The filters can be used as a mix tool, or to create
dynamic effects. Each music channel has a 3-position toggle switch allowing the channel to be routed
to either one of the two filter systems, or directly to the mix.
On power up the filters always default to Low-Pass, but any combination of the three filters types can
be achieved by simultaneously pressing the filter type buttons. The frequency sweep control sets the
cut-off point of the filter, and the resonance alters the Q. A flat frequency response is achieved when
the Frequency Sweep control is fully clockwise (LPF) or fully anticlockwise (HPF), with the Resonance
control set to its midpoint.
4
5
6
Resonance Control
This produces the classic analogue VCF sound by feeding some of
the filter output back to its input. The control ranges from ‘mild’
producing a very subtle effect, to ‘wild’ producing a dramatic phase
effect.
1
HPF Button
Turns on the high pass (bass cut) filter slope. The button will
illuminate when selected.
2
BPF Button
Turns on the band pass (bell shaped) filter slope. The button will
illuminate when selected.
3
LPF Button
Turns on the low pass (treble cut) filter slope. The button will
illuminate when selected.
4
Frequency Sweep Control
This control sets the cut-off frequency of the filter. It ranges from
very low frequency (20Hz) to very high (20kHz).
5
Filter On Switch
Switches the filter on and off. The button will illuminate when selected.
6
ADVANCED BUTTON MODES
Any frequency band select button ([2], [3] and [4]) can be momentarily selected along with the currently
active band. To do this, hold down the button of the band that is currently active and then press the but-
ton of the band to be momentarily selected. Multiple filter bands may be selected by pressing the band
buttons simultaneously. Releasing the band buttons simultaneously will store the selection.
To turn on the filter, press the relevant FILTER ON switch
[6].
This switch has two modes of
operation, latching and momentary. To latch the switch ON, tap once. To briefly switch ON a
filter, press and hold the button; the filter will turn off on release. This function also works the
other way, so if a filter is ON, pressing and holding the button will turn the filter off until the but-
ton is released.
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