Rane | AC 22S | Data Sheet | Rane AC 22S Crossover Data Sheet

Rane AC 22S Crossover Data Sheet
DATA SHEET
AC 22S
ACTIVE CROSSOVER
General Description
The Rane AC 22S Active Crossover is a stereo 2-way with a
mono subwoofer option, or it can be used as a mono 3-way. It
employs state-variable 4th-order Linkwitz-Riley filter alignments
to minimize phase difficulties in the critical crossover region.
Simply put, a Linkwitz-Riley alignment is two cascaded 2ndorder 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.
Features
•
•
•
•
Stereo 2-Way or Mono 3-Way
Linkwitz-Riley Alignment with 24 dB per Octave Slopes
Adjustable Delays
Mono Subwoofer Switch and Output
To further guarantee the transparent operation, adjustable
Delay circuits appear on the Low (& Mid when used in 3-way
mode) 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 also
possible with an internal modification.
The AC 22S uses XLR connectors with active balanced
inputs and outputs. The AC 22S improves upon its previous
model by adding an internal power supply that can be plugged in
almost anywhere in the world.
See the RaneNote Linkwitz-RileyCrossovers: A Primer, available from our website.
•
•
•
•
•
Infrasonic, Ultrasonic, and RFI Filters
Low Output Muting (2-Way)
Input & Output Level Controls
Fully Active Balanced XLR Inputs & Outputs
Internal Universal Power Supply (100-240 VAC)
Data Sheet-1
AC 22S
ACTIVE CROSSOVER
Features & Specifications
Parameter
Crossover: Alignment
..........Slopes
..........Range
Time Delay Adjust Range
Inputs: Type
..........Connectors
..........Impedance
..........Maximum Level
..........Gain Range
Outputs: Type
..........Connectors
..........Impedance
..........Maximum Level
..........Gain Range
Band Muting Switches
RFI Filters
Infrasonic Filter
Ultrasonic Filter
Frequency Response
THD+Noise
IM Distortion (SMPTE)
Signal-to-Noise Ratio
Maximum Power
Universal Line Voltage
Unit: Conformity
..........Construction
..........Size
..........Weight
Shipping: Size
..........Weight
Note: 0 dBu=0.775 Vrms
Data Sheet-2
Specification
Linkwitz-Riley
24 dB per octave
70-3.6 kHz Low to High
Off to +2
Active Balanced
XLR
20k
21
Off to +6
Active Balanced
XLR
200
+20
Off to +12
Yes
Yes
20 Hz, 18 dB/oct., Butterworth
40 kHz, 6 dB/oct., Bessel
20 Hz - 40 kHz
0.02
0.02
92
7
100-240 VAC, 50/60 Hz
CE, FCC, CULUS
All Steel
1.75"H x 19"W x 5.3"D (1U)
4 lb
4.25" x 20.3" x 13.75"
8 lb
Limit
Units
5%
ms
1%
1
-0/+4
Ω
dBu
dB
1%
1
-0/+4
Ω
dBu
dB
Conditions/Comments
Proprietary 4th-order state-variable
41-detent continuously variable pot
Low & Mid Outputs
pin 2 hot per AES standards
pin 2 hot per AES standards
600 Ω or greater
Low & Mid Outputs
3%
3%
+0/-3
.01
.01
2
Hz
Hz
dB
%
%
dB
W
VAC
Linear Phase
+4 dBu, 20 Hz - 20 kHz
60 Hz / 7 kHz, 4:1, +4 dBu
re +4 dBu, 20 kHz noise bandwidth
7W
(4.4 cm x 48.3 cm x 13.3 cm)
(3 kg)
(11 cm x 52 cm x 35 cm)
(5 kg)
AC 22S
ACTIVE CROSSOVER
Block Diagram
DELAY
(0-2 ms)
CH. 1 LEVEL
(Off to +6 dB)
CH. 1
INPUT
2
1
3
FREQUENCY
(70 Hz-3.6 kHz)
LOW
FILTER
RFI
FILTER
0 dB
–
LF LEVEL
(Off to +6 dB)
T
2
CHANNEL
3
1
2
CH. 1
LF OUT
(M3W:LF OUT)
(MONO SUB OUT)
3
1
2
CH. 1
HF OUT
(M3W:NOT USED)
3
1
2
CH. 2
LF OUT
(M3W:MF OUT)
+
20 Hz
MUTE
MONO
SUB
(18 dB/octave)
MONO SUB
+
–
LF LEVEL
(Off to +6 dB)
HIGH
FILTER
40 kHz
+
(6 dB/Octave)
FREQUENCY
(70 Hz-3.6 kHz)
CH. 2 LEVEL
(Off to +6 dB)
CH. 2
INPUT
2
1
3
LOW
FILTER
RFI
FILTER
0 dB
MONO
3 WAY
STEREO
2 WAY
MONO
SUB
DELAY
(0-2 ms)
2
CHANNEL
T
–
LF LEVEL
(Off to +6 dB)
+
(NOT USED IN
MONO SUB)
20 Hz
MUTE
(18 dB/octave)
–
LF LEVEL
(Off to +6 dB)
CH. 2
HF OUT
(M3W:HF OUT)
3
1
2
HIGH
FILTER
+
40 kHz
(6 dB/octave)
Stereo 2-Way
Right Input
Left Input
Stereo 2-way labels are in the top row
100-240 V
50/60 Hz 7 WATTS
COMMERCIAL AUDIO
EQUIPMENT 24TJ
AC 22S
HIGH OUT
LOW OUT
CH 2 IN
STEREO 2-WAY
HIGH OUT
RANE CORP.
LOW OUT
CH 1 IN
This device complies with Part
15 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.
PIN 2: POSITIVE
PIN 3: NEGATIVE
PIN 1: CHASSIS GND
R
MODE
ACN 001 345 482
SUBWOOFER
MONO SUB
2-CHANNEL
MONO SUB OUT
MONO SUB: OMIT
High Amp
High Amp
Low Amp
Low Amp
Mono 3-Way
Input
Mono 3-way labels are in the bottom row
100-240 V
50/60 Hz 7 WATTS
COMMERCIAL AUDIO
EQUIPMENT 24TJ
AC 22S
RANE CORP.
SUBWOOFER SWITCH MUST
BE SET TO 2- CHANNEL
FOR MONO 3-WAY
R
MODE
ACN 001 345 482
HIGH OUT
MONO SUB: OMIT
MID OUT
OMIT MONO
MONO 3-WAY
PIN 2: POSITIVE
PIN 3: NEGATIVE
PIN 1: CHASSIS GND
SUBWOOFER
MONO SUB
2-CHANNEL
OMIT MONO
MONO SUB OUT
LOW OUT
MONO
3-WAY IN
This device complies with Part
15 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.
High Amp
Mid Amp
Low Amp
Data Sheet-3
AC 22S
ACTIVE CROSSOVER
Rear Panel
Choosing the Right Configuration:
Architectural Specifications
Mono, Two-Channel Mono or Stereo?
The active crossover shall contain 4th-order Linkwitz-Riley
filters. Provisions shall exist to correct for driver misalignment by
means of adding time delay to the low frequency outputs.
The 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 active balanced terminated
with XLR connectors. RFI filters shall be provided. Infrasonic
filters shall be built-in.
The active crossover shall afford an input level range of off
to +6 dB. The output level controls shall afford a level range of
from off to +12 dB with muting capability on the low frequency
outputs. The crossover shall supply two independent channels.
The 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. The unit shall be UL and cUL listed. The
unit shall be entirely constructed from cold-rolled steel.
The unit shall be a Rane Corporation AC 22S Active Crossover.
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.
The HAL3s Multiprocessor is by far the best crossover for stereo
3-way systems, plus it handles EQ, compression, and all the
processing you need. If all drivers are built into a single cabinet,
or you are running bi-amped monitors, then the AC 22S is the
one for you.
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 98275-5000 TEL 425-355-6000 FAX 425-347-7757 WEB rane.com
Data Sheet-4
Specifications subject to change without notice 6-2015
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