The Rane AC 23B Active Crossover can be configured as Stereo 2- or 3-Way, or Mono 4- or 5-Way.
The AC 23B employs 4th-order Linkwitz-Riley filter alignments to minimize
phase difficulties in the critical crossover region. Simply put, a
Linkwitz-Riley alignment is two cascaded 2nd-order Butterworth filters
exhibiting identical phase characteristics on their Low-pass and
High-pass outputs. This characteristic guarantees in-phase outputs at
all frequencies. In-phase outputs are mandatory for proper acoustic
summing of common signals from adjacent drivers in the crossover
region. An added benefit of this topology is steep 24 dB per octave
rolloff slopes. A slope of this magnitude guarantees drivers designed
to produce a specific range of frequencies, and no more, will not be
driven past their limits, thereby minimizing distortion and driver
To further guarantee the transparent operation,
adjustable time Delay circuits appear on the Low and Mid Outputs of
each channel to compensate for any physical misalignment of the
drivers. Time correction ensures the mechanical phase alignment of
adjacent drivers will be acoustically correct, thus maintaining the
integrity of the electrical phase alignment of the crossover's filters.
CD horn equalization is possible with an internal modification. The AC
23B uses XLR connectors with active balanced Inputs and Outputs.
Data Sheet (200k) |
Manual (300k) |
Schematic (200k) |
AC Series Crossover Modifications (50k)