Crown SST-MX User manual

132166-3B
4/03
Printed on
recycled paper.
This manual describes the following models:
SST-MX
SST-SX
SST-SBSC
SST-SBSC 3632T
SST-4622
SST-3632
SST-4632
SST-SBSC 4632T
SST-Modules
© 2003 by Crown Audio, Inc., P.O. Box 1000, Elkhart, IN 46515-1000 U.S.A.
Telephone: [phone]. Fax: [phone]. SST modules are produced by
Crown Audio, Inc. Trademark Notice: Crown is a registered trademark of Crown
International. Other trademarks are the property of their respective owners.
Obtaining Other Language Versions:
To obtain information in another language about the use of this
product, please contact your local Crown Distributor. If you need assistance locat-
ing your local distributor, please contact Crown at 574-294-8200.
Note: The information provided in this manual was deemed accurate as of the
publication date. However, updates to this information may have occurred.
To obtain the latest version of this manual, please visit the Crown website at
www.crownaudio.com.

SST Modules
Page 2 Reference Manual
The information furnished in this manual does not include all of the
details of design, production, or variations of the equipment. Nor does
it cover every possible situation which may arise during operation or
maintenance. If you need special assistance beyond the scope of this
manual, please contact Crown Customer Service.
STOP!
Crown SST modules may only be installed by Crown or an authorized
Warranty Service Center. The name of a Service Center near you may
be found online at www.crownaudio.com, or by contacting Crown
Factory Service at:
Crown Factory Service
1718 W. Mishawaka Rd., Elkhart, IN 46515 USA
Phone: [phone] (North America, Puerto Rico and Virgin Islands)
or 574-294-8200 Fax: [phone]
Internet: http://www.crownaudio.com

SST Modules
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Reference Manual
Contents
1 Welcome........................ 4
1.1 Wiring ................................... 4
2 SST-MX.......................... 5
2.1 Controls ................................ 5
2.2 System Setup ....................... 6
2.3 Block Diagram...................... 8
2.4 Specifications ....................... 8
3 SST-SX .......................... 9
3.1 Controls ................................ 9
3.2 System Setup ..................... 10
3.3 Block Diagram.................... 12
3.4 Specifications ..................... 12
4 SST-SBSC ......................13
4.1 Specifications ..................... 13
4.2 Features.............................. 13
4.3 Block Diagram.................... 14
4.4 Input Wiring and Crossover
Frequencies.............................. 15
4.5 System Setup ..................... 16
5 SST-4622.......................17
5.1 System Setup ..................... 17
5.2 Specifications ..................... 18
6 SST-3632.......................19
6.1 System Setup ..................... 19
6.2 Specifications ..................... 20
7 SST-4632.......................21
7.1 System Setup ..................... 21
7.2 Specifications ..................... 22
8 SST-SBSC 3632T..............23
8.1 System Setup ..................... 23
8.2 Specifications ..................... 24
9 SST-SBSC 4632T..............25
9.1 System Setup ..................... 25
9.2 Specifications ..................... 26
10 Service........................27
Appendix .........................29

SST Modules
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1 Welcome
Crown®’s System Solution Topology
(SST) modules bring you superior
control and flexibility with the con-
venience and cost savings of plug-in
processing. SSTs plug quickly and
easily into the back of your amp.
When you use a Crown SST module
to split the power drive to the
loudspeaker components, you gain
a wide range of advantages, includ-
ing:
1. Increased gain because the
insertion loss of passive cross-
over networks is eliminated.
2. Consistent power bandwidth:
power bandwidth is changed
in multi-way passive systems if
transducers change impedance
or vaporize (blow up).
3. Levels can be matched more
accurately to the components.
4. Quicker troubleshooting.
5. Improved dynamic range.
6. Better protection of components
due to steep 24-dB/octave filters.
With hard-wired precision compo-
nents, SST modules deliver consis-
tent bandwidth control, more accu-
rate level matching, and increased
gain (with none of the insertion
loss found with passive crossover
networks). Compact and versatile,
Crown SST modules continue the
Crown tradition for fast setup, great-
sounding output and exceptional
value.
1.1 Wiring
All SST modules feature balanced
inputs. Some models also feature
balanced outputs for routing signals
to other amplifiers in biamped and
triamped systems.
Following are the standard wiring
conventions to follow when wiring
balanced connections to SST mod-
ules:
XLR (AES Standard)
Pin 1:
Pin 2: +
Pin 3: –
Tip Ring Sleeve
Tip: +
Ring: –
Sleeve:
Barrier Block and Terminal Block
connections should be wired as
marked on the SST front panel.

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Reference Manual
2 SST-MX
The SST-MX module is a fourth-order
Linkwitz-Riley type crossover with
2.1 Controls
HP Filter Bypass Switch
This switch enables/disables the
high-pass filter on the local amplified
output signal. Select IN to enable
Figure 2.1 SST-MX Front Panel Controls and Connectors
Figure 2.2 Typical Input Wiring
high-pass filter; select BYPASS to
disable filter for these outputs.
a fixed crossover point set at 100
Hz.

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2.2 System Setup
Typical input wiring is shown in Figure
2.2 on the previous page.
Stereo Mode
Standard stereo-mode output con-
figuration (shown in Figure 2.3)
routes the signal in the following
manner: low-frequency signal from
the amplifier’s Channel 1 input is sent
Figure 2.3 Typical stereo configuration using Crown SST-compatible
amplifier and the SST-MX crossover module.
to the Channel 1 barrier block output;
low-frequency signal from Channel 2
input is sent to the Channel 2 barrier
block output; high-frequency signal
from Channel 1 input is sent to the
local (amplified) Channel 1 output;
high-frequency signal from Channel
2 input is sent to the local (amplified)
Channel 2 output.

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Reference Manual
Bridge-Mono Mode
Standard bridge-mono-mode output
configuration (shown in Figure 2.4)
routes the signal in the following
manner: low-frequency signal from
the amplifier’s Channel 1 input is
sent to the Channel 1 barrier block
output; high-frequency signal from
Channel 1 input is sent to the local
(amplified) Channel 1 output.
Note: Only the Channel 1 audio
signal is required to drive the ampli-
fier during mono operation. If you
are using the SST-MX module with
the amplifier in mono mode, be sure
to turn your Channel 2 level controls
all the way down.
Figure 2.4 Typical Bridge-Mono configuration using Crown SST-compatible
amplifier and the SST-MX crossover module.

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High-Pass Filter Bypass
When activated, the High-Pass Filter
Bypass (Section 2.1) allows the full-
range signal to be sent to the local
(amplified) Channel 1 and Channel 2
outputs, while still providing filtered
low-frequency output to the Channel
1 and Channel 2 barrier block
outputs. This configuration works
well if you have full-range speakers
driven by the main amplifier, plus
dual subs on an auxiliary amp for
sub-bass output.
CH1
CH1SUBOUT
TB
CH2SUBOUT
100HzLP
CH2
–
–
+
+
IN
BYP ASS
100HzHP
HOST
AMPLIFIER
CH1INPUT
HOST
AMPLIFIER
CH2INPUT
100HzLP
24dB/oct.slope
100HzHP
24dB/oct.slope
IN
BYP ASS
100HzLP
24dB/oct.slope
100HzHP
24dB/oct.slope
–
+
–
+
–
+
3
2
1
–
+
3
2
1
2.3 Block Diagram
2.4 Specifications
Note: Specifications describe typical results
using the module installed in a Crown SST-
compatible amplifier. All measurements are
in Stereo mode with 8-ohm loads and an
input sensitivity of 26-dB gain at 1-kHz
rated power unless otherwise specified.
Specifications for units supplied outside
the U.S.A. may vary slightly at different AC
voltages and frequencies.
Frequency Response: ±0.1 dB
from 20 Hz to 20 kHz.
Signal to Noise (A-Weighted):
Better than 85 dB below rated
power.
Input Impedance: 20 k ohms bal-
anced, 10 k ohms unbalanced.
Output Impedance: 600 ohms
balanced.
Total Harmonic Distortion (THD):
1 kHz rated power, less than 0.1%
true THD.
Crosstalk: > 50 dB from 20 Hz to
20 kHz.
Maximum Output: +18 dB into 600
ohms.
Figure 2.5 SST-MX Block Diagram

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3 SST-SX
The SST-SX module is a fourth-
order Linkwitz-Riley type crossover
switchable between 80 Hz and 120
3.1 Controls
80/120 Hz Crossover Selector
A two-position switch, located on the
front panel of the module, is used to
select a crossover frequency of 80
or 120 Hz for both channels 1 and 2
of the local (amplified) signals. This
switch also determines the LP Filter
frequency routed to the Mono Sub
Out connector.
Figure 3.1 SST-SX Controls and Connectors
HP Filter Bypass Switch
This two-position switch enables/
disables the high-pass filter on the
Channel 1 and 2 local (amplified)
signals.The HP Filter Bypass Switch
does not affect signals routed to the
Mono Sub Out connector.
Hz. It also includes summed low-
frequency output.
Figure 3.2 Typical Input Wiring

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3.2 System Setup
Typical input wiring is shown in Figure
3.2 on the previous page.
Stereo Mode
For standard stereo-mode output
wiring, connect your system com-
ponents as shown in Figure 3.3. This
configuration routes the signal in
the following manner: low-frequency
signals from the local amplifier are
sent to the male XLR output; high-
frequency signals from the local
amplifier’s Channel 1 input are sent
to the local (amplified) Channel 1
output; high-frequency signal from
the host amplifier’s Channel 2 input
are sent to the local (amplified)
Channel 2 output.
Figure 3.3 Typical Stereo with Mono Sub Configuration Using the
SST-SX Crossover Module

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Reference Manual
Bridge-Mono Mode
For standard bridge-mono-mode
output wiring, connect your system
components as shown in Figure
3.4. This configuration routes the
signals in the following manner:
low-frequency signals from the host
amplifier are sent to the male XLR
output; high-frequency signal from
the host amplifier’s Channel 1 input
are sent to the local (amplified)
Channel 1 output.
Note: Only the Channel 1 audio
signals are required to drive the
amplifier during mono operation. If
you are using the SST-SX module with
a Crown SST-compatible amplifier
in mono mode, be sure to turn your
Channel 2 level control all the way
down.
Figure 3.4 Typical Bridge-Mono Configuration Using the SST-SX
Crossover Module

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High-Pass Filter Bypass
When activated, the High-Pass Filter
Bypass (Section 3.1) allows the full-
range signal to be sent to the local
(amplified) Channel 1 and Channel 2
outputs, while still providing filtered
low-frequency output to the Mono
Summed Male XLR Output. This
configuration works well if you have
full-range speakers driven by the
main amplifier, plus a sub on an
auxiliary amp for sub-bass output.
3.3 Block Diagram
3.4 Specifications
Note: Specifications describe typical results
using the module installed in a Crown SST-
compatible amplifier. All measurements are
in Stereo mode with 8-ohm loads and an
input sensitivity of 26-dB gain at 1-kHz
rated power unless otherwise specified.
Specifications for units supplied outside
the U.S.A. may vary slightly at different AC
voltages and frequencies.
Performance
Frequency Response: ±0.1 dB
from 20 Hz to 20 kHz at 1 watt.
Signal to Noise Ratio,
A-Weighted: Better than 105 dB
below rated 1-kHz power;
20 Hz to 20 kHz: Better than 100
dB below rated 1-kHz power.
Total Harmonic Distortion (THD):
1-kHz rated power, 1.0% or less
true THD from 20 Hz to 20 kHz.
Crosstalk: Better than 50 dB below
rated power, 20 Hz to 20 kHz.
Input/Output
Input Impedance: Nominally 20 k
ohms, balanced. Nominally 10 k
ohms, unbalanced.
Output Impedance: 600 ohms,
balanced.
Maximum Output: +15 dBm into
600 ohms.
Figure 3.5 SST-SX Block Diagram
80 / 120 Hz HP
24 dB/oct. slope
80 Hz
120 Hz
80 / 120 Hz LP
24 dB/oct. slope
80 / 120 Hz HP
24 dB/oct. slope
80 Hz
120 Hz
80 / 120 Hz LP
24 dB/oct. slope
OUT
IN
BYPASS
OUT
IN
BYPASS HOST
AMPLIFIE
R
CH1 INPU
T
HOST
AMPLIFIE
R
CH2 INPU
T
SUB OUT
(SUMMED)
CH1
CH2
3
2
1
3
2
1

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4 SST-SBSC
The Crown SST-SBSC modules
are stereo crossover networks
with equalization and summed
bass output. Truly professional
crossovers, SST-SBSC modules use
hard-wired precision components
that stay at the factory-set frequen-
cies for consistent bandwidth
control.
SST (System Solution Topologies)
modules install into the back of
Crown SST-compatible amplifiers,
saving rack space and simplifying
system wiring.
Several SST-SBSC modules with
different crossover frequencies are
available (see Table 1 on page
15).
4.1 Specifications
Signal to Noise (A-Weighted):
Better than 85 dB below rated
power.
Input Impedance: 20 k ohms bal-
anced, 10 k ohms unbalanced.
Output Impedance: 600 ohms
balanced.
Total Harmonic Distortion (THD):
1 kHz rated power, less than 0.1%
true THD.
Crosstalk:> 50 dB from 20 Hz
to 20 kHz.
Maximum Output: +18 dB into
600 ohms.
Figure 4.1 SST-SBSC Front Panel
Connectors
4.2 Features
• Stereo biamp and sub output.
Two in, five out.
• Mono summing of sub output
for driving subwoofers.
• Certain modules have 2.8-kHz
CD horn equalization.
• Certain modules are designed
specifically for JBL ScreenAr-
ray™ loudspeakers.
• Neutrik® Combo input jacks.
• Removable barrier block jacks
for balanced output to other
components.
• 18-dB/octave high-pass filter on
sub and 18-dB/octave high-
pass filter on low-frequency out-
puts.
• 24-dB/octave low-pass filter on
high-frequency outputs.

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Figure 4.2 SST-SBSC Block Diagram
4.3 Block Diagram

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Reference Manual
Figure 4.3 Typical Input Wiring
Table 1: SBSC MODULES CROSSOVER FREQUENCIES
MODEL
NUMBER
CHANNEL 1 & 2 SUMMED SUB CD
BOOST
LOW FREQUENCY HIGH FREQUENCY OUTPUT
HIGH PASS LOW PASS HIGH PASS LOW PASS HIGH PASS LOW PASS
SBSCX1 80 800 800 16K 32 80 Y
SBSCX2 80 500 500 16K 32 80 Y
SBSCX12 32 120 120 20K 32 120 N
SBSCX17 32 350 350 20K 32 80 N
SBSCX19 32 1.25K 1.25K 20K 32 100 Y
SBSCX3632T 500 1.2K 1.5K 22.5K 35 450 Y
SBSCX4632T 250 1.2K 1.5K 22.5K 35 250 Y
SBSCJBL4675 32 1.2K 1K 22.5K 32 100 N
SBSCJBL5672 250 2.4K 2.5K 22.5K 32 300 N
4.4 Input Wiring and Crossover Frequencies

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4.5 System Setup
Typical input wiring is shown in Figure
4.3 on the previous page.
Stereo
Standard stereo-mode output con-
figuration (Figure 4.4) routes the
signal in the following manner:
Lows from SST-SBSC CH1 go
through the local amp to its CH1
speaker output.
Lows from SST-SBSC CH2 go
through the local amp to its CH2
speaker output.
Highs from SST-SBSC CH1 go to its
Output A, and from there through
aux amp CH1 to its CH1 speaker
output.
Highs from SST-SBSC CH2 go to its
Output C, and from there through
aux amp CH2 to its CH2 speaker
output.
Sub-bass signal (from SST-SBSC
CH1 and CH2 summed) goes to
SST-SBSC Output B, and from there
through sub amp CH1 to its CH1
speaker output.
Figure 4.4 Typical stereo configuration using Crown SST-compatible amplifier
and an SST-SBSC crossover module

SST Modules
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Reference Manual
5 SST-4622
The SST-4622 provides custom
crossover and equalization optimized
for the JBL ScreenArray model 4622
cinema speaker system.
5.1 System Setup
Connect your system components
as shown in Figure 5.2.
Note: The amplifier should be placed
in Stereo (Dual) mode.
Figure 5.1 SST-4622 Front Panel
Connector
The remaining SST modules described in this manual are designed specifically
for use with JBL®ScreenArray ®cinema speaker systems. Each SST model is
optimized for use with one specific JBL ScreenArray speaker model.
Figure 5.2 Stereo configuration using a Crown SST-compatible amplifier
and the SST-4622 module.

SST Modules
Page 18 Reference Manual
5.2 Specifications
Frequency Response: See Figure
5.3.
Signal to Noise Ratio: 90 dB, A
weighted.
Input Impedance: 20 k ohms bal-
anced, 10 k ohms unbalanced.
Connectors
Input: Electronically Balanced,
3-position removable terminal
block.
Figure 5.3 SST-4622 Frequency Response

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Reference Manual
Figure 6.1 SST-3632 Front Panel
Connector
6 SST-3632
The SST-3632 provides custom
crossover and equalization opti-
mized for the JBL ScreenArray model
3632 cinema speaker system.
6.1 System Setup
Connect your system components
as shown in Figure 6.2.
Note: The amplifier should be placed
in Stereo (Dual) mode.
Figure 6.2 Stereo configuration using a Crown SST-compatible amplifier
and the SST-3632 module.

SST Modules
Page 20 Reference Manual
6.2 Specifications
Frequency Response: See Figure
6.3.
Signal to Noise Ratio: 90 dB, A
weighted.
Input Impedance: 20 k ohms bal-
anced, 10 k ohms unbalanced.
Connectors
Input: Electronically Balanced,
3-position removable terminal
block.
Figure 6.3 SST-3632 Frequency Response