AC 23 & AC 23B
ACTIVE CROSSOVERS
Data Sheet-1
AC 23 Features
• ¼" TRS Inputs & ¼" TS Outputs
• Active Balanced/Unbalanced Inputs & Unbalanced Outputs
AC 23B Features
• XLR Inputs & Outputs
• Fully Active Balanced Inputs & Outputs
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
• Low & Mid Output Muting (3-Way)
• Input & Output Level Controls
• UL/CSA/CE and 100/120/230 VAC Remote Power Supplies
General Description
The Rane AC 23 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 23 uses
¼" TRS connectors with balanced/unbalanced Inputs and
unbalanced Outputs. The AC 23B 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 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 23, adjustable Delay circuits appear on the Low & 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 now possible with an internal modification.
Time Delay can also be internally transplanted to the Mid and
High Outputs if desired.
See RaneNote 107 for more information regarding
Linkwitz-Riley designs.
DATA SHEET
