miniDSP 2X4 HD User Manual page 26

Basic/Advanced
By default, the crossover is in basic mode, and shows the controls described below. Advanced
mode enables custom biquad programming for almost infinite flexibility in crossover filter
implementation. This is described in
Cutoff Frequency
Sets the nominal cutoff frequency of the crossover. In actual fact, the crossover has a more or
less gradual transition from "full on" to "full off," as determined by the filter slope.
Filter type
Selects the type and slope of the filter. The steeper the slope, the more quickly frequencies
above or below the cutoff frequency are attenuated. There are three types of filter:
Butterworth (BW)
Linkwitz-Riley (LR)
Bessel
Bypass
Clicking on the Bypass button disables or enables that high
pass or low pass filter. The filter is bypassed when the
button is "lit".
Each channel can be linked to one other channel. When a channel is linked to another, the crossover settings of
that channel are mirrored to the other. Typically, the corresponding drivers on the left and right channels are
linked: left and right tweeter, left and right woofer, and so on. To link a channel, select the other channel from
the drop-down menu at the top left of the Xover screen, and click the Link checkbox.
miniDSP Ltd, Hong Kong / www.minidsp.com
Custom biquad programming
Available in 6, 12, 18, 24, 30, 36, 42, and 48 dB/octave, Butterworth crossover
filters are 3 dB down at the cutoff frequency.
Available in 12, 24, 36, and 48 dB/octave, Linkwitz-Riley crossover filters are 6 dB
down at the cutoff frequency.
Available in 12 dB/octave only, a Bessel filter gives a more gradual roll-off
through the crossover region.
/ Features and specifications subject to change without prior notice
on page 29.
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