Rane Music Mixer AC 23S Data Sheet

ACTIVE CROSSOVER

Data Sheet-1

•   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

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 Link-

witz-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 characteris-

tics 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 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 infor-

mation, available at www.rane.com.

•   Low & Mid Output Muting (3-Way)
•   Input & Output Level Controls
•   Fully Active Balanced XLR Inputs & Outputs
•   Internal Universal Power Supply (100-240 VAC)