AC 23S
ACTIVE CROSSOVER
Data Sheet-1
Features
• Stereo 2- or 3-Way, Mono 4- or 5-Way
• Linkwitz-Riley Alignment with 24 dB per Octave Slopes
• Adjustable Delays
• Infrasonic, Ultrasonic and RFI Filters
General Description
The Rane AC 23S Active Crossover can be configured as a
stereo 2- or 3-way, or a mono 4- or 5-way. It employs 4th-order
Linkwitz-Riley filter alignments to minimize phase difficulties in
the critical crossover region. The AC 23S uses XLR connectors
with active balanced Inputs and Outputs.
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 guar-
antees 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 fatigue.
To further guarantee the transparent operation of the
AC 23S, adjustable Delay circuits appear on the Low & Mid
Outputs of each Channel to compensate for any physical mis-
alignment 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.
In 2- or 3-way stereo mode, the low outputs may be mono'ed
by moving an internal jumper. Constant directivity (CD) horn
equalization is possible with an internal modification. See the
manual for details.
See the RaneNote
Linkwitz-Riley Crossovers
for more informa-
tion, available at www.rane.com.
DATA SHEET
• Low & Mid Output Muting (3-Way)
• Input & Output Level Controls
• Fully Active Balanced XLR Inputs & Outputs
• Internal Universal Power Supply (100-240 VAC)
