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MONO 4W OR 5W: INACTIVE 4W: INACTIVE4W: INACTIVE
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MAXMIN
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MAXMIN
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MAXMIN
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MAXMIN
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100
80 900
850
150
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240
750
600
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190
250
7 . 0k
5.8k
550
475
350
700
2.0k
2.8k
4.5k
1.0k
190
250
7 . 0k
5.8k
550
475
350
700
2.0k
2.8k
4.5k
1.0k
1k70
4W: MID / HIGH
2W: INACTIVE 2W: INACTIVE 2W: LOW / HIGH 2W: LOW / HIGH2W: INACTIVE2W: INACTIVE 2W: LOW2W: LOW
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80 900
850
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600
400
1k70
MUTE
LEVEL LEVEL LEVEL LEVEL
MASTER
LEVEL
MASTER
LEVEL LEVEL LEVEL
MUTE
FREQUENCY
DELAY DELAY DELAY DELAY
FREQUENCY FREQUENCY
MUTE MUTE
AC 23S
ACTIVE
CROSSOVER
CH 2CH 1
FREQUENCY
LOW MID LOW MIDHIGH HIGH
MIDMONO MASTER SUBWOOFER SUB / LOW HIGHLOW LOW / MID
MID / HIGHLOW / MID MID / HIGHLOW / MID
5W: HIGH-MID / HIGH5W: HIGH-MID5W: MID / HIGH-MID
POWER
DATA SHEET
General Description
e 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. e AC 23S uses XLR connectors with
active balanced Inputs and Outputs.
Simply put, a Linkwitz-Riley alignment is two cascaded 2ndorder Butterworth filters exhibiting identical phase characteristics on their low-pass and high-pass outputs. is 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
AC 23S
ACTIVE CROSSOVER
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 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.
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 information, available at www.rane.com.
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
• Fully Active Balanced XLR Inputs & Outputs
• Internal Universal Power Supply (100-240 VAC)
Data Sheet-1
Page 2
AC 23S
ACTIVE CROSSOVER
Features and Specifications
Parameter Specication Limit Units Conditions/Comments
Crossover: Alignment Linkwitz-Riley Proprietary 4th-order state-variable
..........Slopes 24 dB per Octave
..........Range (3-way) 70-1 kHz Low to Mid 41-detent continuously variable pot
..........Range (3-way) 190-7 kHz Mid to High as above
..........Range (2-way) 190-7 kHz Low to High as above
Time Delay Adjust Range Off to +2 5% ms Low & Mid Outputs only
Inputs: Impedance 20k 1 Ω
..........Maximum Level +21 1 dBu
..........Gain Range Off to +6 -0/+ 4 dB
Inputs: Type Active Balanced XLR Pin 2 hot per AES standards
Outputs: Type Active Balanced XLR Pin 2 hot per AES standards
..........Impedance 200 1% Ω
..........Maximum Level +20 1 dBu 600 Ω or greater
..........Gain Range Off to +12 -0/+ 4 dB
Band Muting Switches Yes Low & Mid Outputs only
RFI Filters Yes
Infrasonic Filter 20 Hz, 18 dB/Oct, Butterworth 3% Hz
Ultrasonic Filter 40 kHz, 18 dB/Oct, Bessel 3% Hz Linear phase
Frequency Response 20-40 kHz +0/-3 dB
THD+Noise 0.02 .01 % +4 dBu, 20-20 kHz
IM Distortion (SMPTE) 0.02 .01 % 60 Hz / 7 kHz, 4:1, +4 dBu
Signal-to-Noise Ratio 92 2 dB re +4 dBu, 20 kHz noise bandwidth
Maximum Power 7 W
Universal Line Voltage 100-240 VAC, 50/60 Hz VAC 7W
Unit: Agency Listing UL/cUL/CE
Unit: Construction All Steel
..........Size 1.75" H x 19" W x 5.3" D (1U) (4.4 cm x 48.3 cm x 13.3 cm)
..........Weight 5 lb (2.3 kg)
Shipping: Size 4.25" x 20.3" x 13.75" (11.5 cm x 52 cm x 35 cm)
..........Weight 9 lb (4.1 kg)
Note: 0 dBu=0.775 Vrms
Data Sheet-2
Page 3
Block Diagram
AC 23S
ACTIVE CROSSOVER
Data Sheet-3
Page 4
AC 23S
5W: HIGH MID OUT LOW OUTHIGH OUT
4W: OMIT
MONO: OMIT
3W: LOW OUT
2W: OMIT
3W: MID OUT
2W: LOW
HIGH OUT
3W 2W
CHANNEL 2
STEREO
CHANNEL 1
STEREO
MONO 4W / 5W IN
MONO: OMIT
SUB OUT MID OUT
3W: LOW OUT
2W: OMIT
3W: MID OUT
2W: LOW
3W 2W
MONO
4W 5W
STEREO
STEREO 3W / 2W HIGH OUT
PIN 2: POSITIVE
PIN 3: NEGATIVE
PIN 1: CHASSIS GND
CHANNEL 2 IN CHANNEL 1 IN
MONO: SET SWITCHES AS SHOWN
100-240 V
50/60 Hz 7 WATTS
COMMERCIAL AUDIO
EQUIPMENT 24TJ
R
This device complies with Part 1 5 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
ACN 001 345 482
MADE IN U.S.A.
RANE CORP.
AC 23S
SET TO
5W
ACTIVE CROSSOVER
Rear Panel
Choosing the Right Configuration:
Mono, Dual Mono, or Stereo?
Very few systems indeed will utilize a two channel crossover
for the purpose of true stereo imaging. Discrete stereo channels
which are run from the mixing board are usually used for
panning effects and/or for separate equalization of left and
right speaker stacks. Different sides of the room often require
significantly different equalization due to varying room
acoustics, dimensions, positioning of speaker stacks near walls,
curtains and the like.
Even though you may not plan to use stereo equalization
or panning effects, it is recommended that your system utilize
discrete crossover channels for each stack of speakers to ensure
flexibility and control for consistent, optimum sound quality.
For example, if you plan to run a multi-stack system mono
three-way, use the AC 23S rather than the AC 22S for separate
control over each set of speakers—especially since phase
alignment may differ with each stack requiring separate time
delay adjustments. Even with only a single system equalizer, the
AC 23S can deliver the extra independent control which can
make a difference in sound throughout the listening area. If all
drivers are built into a single cabinet, or you are running biamped monitors, then the AC 22B is the one for you.
Architectural Specifications
e active crossover shall contain 4th-order Linkwitz-Riley
filters. Provisions shall exist to correct for driver misalignment by
adding time delay to the low and mid frequency outputs.
e crossover frequency shall be controlled by a continuously
variable control with 41 detents to allow mechanical reference of
crossover setting.
Signal inputs and outputs shall be of active balanced design
terminated with XLR connectors. RFI, infrasonic, and ultrasonic
filters shall be built-in.
e active crossover shall afford an input level range of Off
to +6 dB. e output level controls shall afford a level range of
from Off to +12 dB with muting capability on the low and mid
frequency outputs. e crossover shall supply two independent
channels.
e unit shall be capable of operation by means of its own
built-in universal power supply operating at 100-240 VAC and
meet CE requirements. e unit shall be UL and cUL listed. e
unit shall be entirely constructed from cold-rolled steel.
e unit shall be a Rane Corporation AC 23S Active Crossover.
Available Accessories
• SC 1.7 Security Cover
References
1. S.H. Linkwitz, “Active Crossover Networks for Noncoincident Drivers,” J. Audio Eng. Soc., vol. 24, pp. 2-8 (Jan/Feb 1976).
2. D. Bohn, “A Fourth-Order State-Variable Filter for Linkwitz-Riley Active Crossover Designs,” presented at the 74th
Convention of the Audio Engineering Society, New York, Oct. 9-12, 1983, preprint no. 2011.
3. D. Bohn, “Linkwitz-Riley Crossovers: A Primer,” RaneNote, (1983, 1989, 2005).
4. D. Bohn, “Why Not Wye?” RaneNote, (1984).
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 USA TEL 425-355-6000 FAX 425-347-7757 WEB www.rane.com
Data Sheet-4
All features & specifications subject to change without notice.
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