Owner`s manual
Operating Manual - nX, nXe, and nXp Power Ampliers
36
4) Crossover Functions
Four-Way, Three-Way, and Two-Way Crossover (outputs only)
The Crossover tool offers a convenient way to congure amplier outputs. Depending on whether the desired crossover
is two, three, or four-way, all High-Pass (HPF) and Low-Pass Filters (LPF) are automatically placed on output channels. Initial
crossover frequencies are assigned with the default lter type of 24dB/oct Butterworth, both of which can be changed. In the
frequency response display screen, all currently loaded lter frequencies are available for editing by Left-Click dragging a HPF/
LPF node, or by using the text boxes below the GUI.
Warning: High Pass Filter determines the lower frequency limit of the signal, while the Low Pass Filter determines
the upper frequency limit. Be careful not to accidentally send low frequency signals to high frequency drivers. Check the loud-
speaker specications to determine a safe operating frequency range.
Available Filter Types:
Bessel - 2nd, 3rd, 4th and 8th order (12, 18, 24, 48 dB/octave)
Butterworth -2nd, 3rd, 4th and 8th order (12, 18, 24, 48 dB/octave)
Linkwitz-Riley -2nd, 4th and 8th order (12, 24, 48 dB/octave)
The following summarizes the three primary lter types offered:
Butterworth
Butterworth lters individually are always -3dB at the displayed crossover frequency and have a "maximally at" pass-
band and sharpest transition to the stop-band. When a Butterworth HPF and LPF of the same corner frequency are summed, the
combined response is always +3dB. Note that when 12dB/octave Butterworth HPF and LPF lters are used to create a crossover,
the polarity of one of the outputs may need to be inverted to compensate for the phase shift of the lter.