Rane AC 23B Datasheet
AC 23B
ACTIVE CROSSOVER
Data Sheet-
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 23B 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 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 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 23B, 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.
MONO 4W OR 5W: INACTIVE
4W: MID / HIGH
4W: INACTIVE
4W: INACTIVE
10
0
2
4
8
6
10
0
2
4
8
6
10
0
2
4
8
6
10
0
2
4
8
6
10
0
2
4
8
6
10
0
2
4
8
6
10
0
2
4
8
6
10
0
2
4
8
6
MAX
MIN
2
4
8
6
MAX
MIN
2
4
8
6
MAX
MIN
2
4
8
6
MAX
MIN
2
4
8
6
100
80
1k
900
850
150
200
240
750
600
400
190
250
7.0k
5.8k
550
475
350
700
2.0k
2.8k
4.5k
1.0k
190
250
7k
5.8k
550
475
350
700
2.0k
2.8k
4.5k
1.0k
100
80
1k
900
850
150
200
240
750
600
400
2W: INACTIVE
ACTIVE
CROSSOVER
70
70
2W: INACTIVE
2W: LOW / HIGH
2W: LOW / HIGH
2W: INACTIVE
2W: INACTIVE
2W: LOW
2W: LOW
LEVEL
LEVEL
MUTE
LEVEL
LEVEL
MUTE
FREQUENCY
DELAY
DELAY
LEVEL
FREQUENCY
FREQUENCY
LEVEL
DELAY
MUTE
FREQUENCY
LEVEL
DELAY
MUTE
LEVEL
AC 23B
CH 2
MASTER
CH 1
MASTER
POWER
FREQUENCY
LOW
MID
LOW
MID
HIGH
HIGH
MID
MONO MASTER
SUBWOOFER
SUB / LOW
HIGH
LOW
LOW / MID
3W: MID / HIGH
3W: LOW / MID
3W: MID / HIGH
3W: LOW / MID
5W: HIGH-MID / HIGH
5W: HIGH-MID
5W: MID / HIGH-MID
DATA SHEET
• Low & Mid Output Muting (3-Way)
• Input & Output Level Controls
• Fully Active Balanced XLR Inputs & Outputs
• UL/CSA/CE and 00/20/230 VAC Remote Power Supplies