Rane | AC 22B | Data Sheet | Rane AC 22B Crossover Data Sheet

Rane AC 22B Crossover Data Sheet
DATA SHEET
AC 22B
ACTIVE CROSSOVER
CH 1
MASTER
4
2
4
8
0
LOW
10
LEVEL
MASTER
LOW / HIGH
MONO SUB
6
6
2
4
8
0
2
10
LEVEL
6
8
MIN
MUTE
MAX
DELAY
LOW
300
400
250
500
180
700
120
1.0k
90
1.5k
80
2.0k
75
3.0k
70
3.6k
FREQUENCY
LOW / MID
HIGH
4
STEREO
2
4
8
0
CH 2
MASTER
6
2
10
LEVEL
INACTIVE
4
8
0
10
4
8
6
2
10
LEVEL
8
MIN
MUTE
MID
INACTIVE
LOW / HIGH
6
2
0
LEVEL
MONO
LOW
INACTIVE: MONO SUB
6
MAX
DELAY
300
400
250
500
180
700
120
1.0k
90
1.5k
80
2.0k
75
3.0k
70
3.6k
FREQUENCY
MID / HIGH
HIGH
4
6
0
10
2
AC 22B
ACTIVE
CROSSOVER
8
LEVEL
POWER
HIGH
General Description
The Rane AC 22B Active Crossover is a stereo 2-way with a
mono subwoofer option, or it can be used as a mono 3-way. They
employ state-variable 4th-order Linkwitz-Riley filter alignments
to minimize phase difficulties in the critical crossover region.
The AC 22B 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. 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
Features
•
•
•
•
Stereo 2-Way or Mono 3-Way
Linkwitz-Riley Alignment with 24 dB per Octave Slopes
Adjustable Delays
Mono Subwoofer Switch and Output
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, 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.
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
UL/CSA/CE and 100/120/230 VAC Remote Power Supplies
Data Sheet-
AC 22B
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
Unit: Agency Listing
..........120 VAC model
..........230 VAC model
Power Supply: Agency Listing
..........120 VAC model
..........230 VAC model
..........100 VAC model
Power Supply Requirement
..........Maximum Current
Unit: Construction
..........Size
..........Weight
Shipping: Size
..........Weight
Note: 0 dBu=0.775 Vrms
Data Sheet-
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
Limit
Units
5%
ms
1%
1
-0/+4
Ω
dBu
dB
1%
1
-0/+4
Ω
dBu
dB
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
Class 2 Equipment
UL & CSA
CE-EMC
CE-Safety
UL
CSA
CE-EMC
CE-Safety
Built to JIS
18 VAC w/center tap
160
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
Conditions/Comments
Proprietary 4th-order state-variable
0.1
Vrms
mA
Linear Phase
+4 dBu, 20 Hz - 20 kHz
60 Hz / 7 kHz, 4:1, +4 dBu
re +4 dBu, 20 kHz noise bandwidth
National Electrical Code
Exempt Class 2 equipment
EMC directive 89/336/EEC
Exempt per Art. 1, LVD 73/23/EEC
Class 2 Equipment
File no. E88261
File no. LR58948
EMC directive 89/336/EEC
LV directive 73/23/EEC
Japan only
RS 1 (see data sheet)
RMS current from remote supply
(4.4 cm x 48.3 cm x 13.3 cm)
(3 kg)
(11 cm x 52 cm x 35 cm)
(5 kg)
AC 22B
ACTIVE CROSSOVER
Block Diagram
DELAY
(0-2 ms)
CH. 1 LEVEL
(Off to +6 dB)
CH. 1
INPUT
2
1
3
0 dB
–
FREQUENCY
(70 Hz-3.6 kHz)
LOW
FILTER
RFI
FILTER
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)
LF LEVEL
(Off to +6 dB)
MONO SUB
+
–
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
LF LEVEL
(Off to +6 dB)
T
–
+
(NOT USED IN
MONO SUB)
20 Hz
MUTE
(18 dB/octave)
LF LEVEL
(Off to +6 dB)
–
3
1
2
HIGH
FILTER
CH. 2
HF OUT
(M3W:HF OUT)
+
40 kHz
(6 dB/octave)
Stereo 2-Way
Left Input
Right Input
Stereo 2-Way labels in this row.
AC 22B
POWER
HIGH OUT
LOW OUT
CHANNEL 2 IN
SYSTEM MODE
STEREO
MONO
2-WAY
3-WAY
ACN 001 345 482
160mA
HIGH OUT
CLASS 2 EQUIPMENT
STEREO 2-WAY
HIGH OUT
LOW OUT
CHANNEL 1 IN
SUBWOOFER SWITCH MUST
BE SET TO 2-CHANNEL
FOR MONO 3-WAY
RANE CORP.
OMIT FOR MONO SUB
MID OUT
OMIT MONO
PIN 2=POSITIVE
PIN 3=NEGATIVE
PIN 1=CHASSIS GND
SUBWOOFER
MONO SUB
2CHANNEL
MONO 3-WAY
OMIT MONO
MONO SUB OUT
LOW OUT
MONO 3-WAY
High Amp
High Amp
Low Amp
Low Amp
Mono 3-Way
Input
Mono 3-Way labels in this row.
AC 22B
POWER
HIGH OUT
LOW OUT
CHANNEL 2 IN
SYSTEM MODE
STEREO
MONO
2-WAY
3-WAY
ACN 001 345 482
160mA
CLASS 2 EQUIPMENT
STEREO 2-WAY
HIGH OUT
LOW OUT
CHANNEL 1 IN
SUBWOOFER SWITCH MUST
BE SET TO 2-CHANNEL
FOR MONO 3-WAY
RANE CORP.
HIGH OUT
OMIT FOR MONO SUB
MID OUT
OMIT MONO
PIN 2=POSITIVE
PIN 3=NEGATIVE
PIN 1=CHASSIS GND
SUBWOOFER
2MONO SUB
CHANNEL
MONO 3-WAY
OMIT MONO
MONO SUB OUT
LOW OUT
MONO 3-WAY
High Amp
Mid Amp
Low Amp
Data Sheet-
AC 22B
ACTIVE CROSSOVER
Rear Panel
AC 22B
POWER
HIGH OUT
LOW OUT
CHANNEL 2 IN
STEREO 2-WAY
SYSTEM MODE
STEREO
MONO
2-WAY
3-WAY
ACN 001 345 482
160mA
CLASS 2 EQUIPMENT
HIGH OUT
LOW OUT
CHANNEL 1 IN
SUBWOOFER SWITCH MUST
BE SET TO 2-CHANNEL
FOR MONO 3-WAY
RANE CORP.
HIGH OUT
OMIT FOR MONO SUB
MID OUT
OMIT MONO
PIN 2=POSITIVE
PIN 3=NEGATIVE
PIN 1=CHASSIS GND
SUBWOOFER
2MONO SUB
CHANNEL
MONO 3-WAY
OMIT MONO
MONO SUB OUT
LOW OUT
MONO 3-WAY
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 exempt from agency safety requirements
and powered from a UL listed, CSA certified remote power supply (120 VAC) or CE approved (230 VAC) via a rear panel input
modular plug. The unit shall be constructed entirely from coldrolled steel, and mount into a standard 1U EIA rack.
The unit shall be a Rane Corporation AC 22B 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. For
example, if you plan to run a multi-stack system mono 3‑way,
use the AC 23B rather than the AC 22B 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 23B 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 bi-amped monitors, then the
AC 22B is the one for you.
When all drivers in stacks are equal and acoustic differences
are not critical, delays are not required, and simplicity of use is
important, we recommend the Rane SAC 22 or SAC 23 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 TEL 425-355-6000 FAX 425-347-7757 WEB www.rane.com
Data Sheet-
All features & specifications subject to change without notice. DOC 106274
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