Extron electronics SB 33 A Series User manual

User Guide
SB 33 A Series
Speakers
Adjustable Width Sound Bar
68-3103-01 Rev. C
01 22

Safety Instructions
Safety Instructions • English
WARNING: This symbol, , when used on the product, is intended to
alert the user of the presence of uninsulated dangerous voltage within
the product’s enclosure that may present a risk of electric shock.
ATTENTION: This symbol, , when used on the product, is intended
to alert the user of important operating and maintenance (servicing)
instructions in the literature provided with the equipment.
For information on safety guidelines, regulatory compliances, EMI/EMF
compatibility, accessibility, and related topics, see the Extron Safety and
Regulatory Compliance Guide, part number 68-290-01, on the Extron website,
www.extron.com.


Copyright
© 2019-2022 Extron. All rights reserved. www.extron.com
Trademarks
All trademarks mentioned in this guide are the properties of their respective owners.
The following registered trademarks (®), registered service marks (SM), and trademarks (TM) are the property of RGBSystems, Inc. or Extron (see the
current list of trademarks on the Terms of Use page at www.extron.com):
Registered Trademarks (®)
Extron, Cable Cubby, ControlScript, CrossPoint, DTP, eBUS, EDID Manager, EDID Minder, eLink, Flat Field, FlexOS, Glitch Free, GlobalConfigurator,
GlobalScripter, GlobalViewer, Hideaway, HyperLane, IPIntercom, IPLink, KeyMinder, LinkLicense, LockIt, MediaLink, MediaPort, NAV,
NetPA, PlenumVault, PoleVault, PowerCage, PURE3, Quantum, ShareLink, Show Me, SoundField, SpeedMount, SpeedSwitch, StudioStation,
SystemINTEGRATOR, TeamWork, TouchLink, V-Lock, VN-Matrix, VoiceLift, WallVault, WindoWall, XPA, XTP, XTPSystems, and ZipClip
Registered Service Mark(SM) : S3 Service Support Solutions
Trademarks (™)
AAP, AFL (Accu-RATEFrameLock), ADSP(Advanced Digital Sync Processing), AVEdge, CableCover, CDRS(ClassD Ripple Suppression),
CodecConnect, DDSP(Digital Display Sync Processing), DMI (DynamicMotionInterpolation), DriverConfigurator, DSPConfigurator, DSVP(Digital
Sync Validation Processing), EQIP, Everlast, FastBite, Flex55, FOX, FOXBOX, IP Intercom HelpDesk, MAAP, MicroDigital, Opti-Torque,
PendantConnect, ProDSP, QS-FPC(QuickSwitch Front Panel Controller), RoomAgent, Scope-Trigger, SIS, SimpleInstructionSet, Skew-Free,
SpeedNav, Triple-Action Switching, True4K, True8K, Vector™ 4K, WebShare, XTRA, and ZipCaddy

FCC Class B Notice
NOTE: 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.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part15 of the FCC rules. These limits provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. There is no
guarantee that interference will not occur. If this equipment does cause interference to radio
or television reception, which can be determined by turning the equipment off and on, you
are encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
In order to maintain compliance with FCC regulations, shielded cables must be used with
this equipment. Operation with non-approved equipment or unshielded cables is likely to
result in interference to radio and TV reception. The user is cautioned that changes and
modifications made to the equipment without the approval of the manufacturer could void
the user’s authority to operate this equipment.
NOTES: For more information on safety guidelines, regulatory compliances, EMI/EMF
compatibility, accessibility, and related topics see the Extron Safety and Regulatory
Compliance Guide on the Extron website.
Class B Equipment — Information in This Instruction Manual

Conventions Used in this Guide
Notifications
The following notifications are used in this guide:
WARNING: Potential risk of severe injury or death.
AVERTISSEMENT : Risque potentiel de blessure grave ou de mort.
CAUTION: Risk of minor personal injury.
ATTENTION : Risque de blessuremineure.
ATTENTION:
• Risk of property damage.
• Risque de dommages matériels.
NOTE: A note draws attention to important information.
Specifications Availability
Product specifications are available on the Extron website, www.extron.com.
Extron Glossary of Terms
A glossary of terms is available at https://www.extron.com/technology/glossary.aspx.

Contents Contents
Introduction ............................................... 1
About this Guide.................................................. 1
Product Description............................................. 1
Features .............................................................. 2
Application Example ............................................ 3
Installation................................................. 4
Installation Overview ............................................ 4
Mounting Instructions .......................................... 4
Installing the Wallplate on a Non-masonry Wall 4
Installing the Wallplate on a Masonry Wall ........ 7
Attaching the SB 33 A to the Wallplate ............ 9
Mounting a Camera....................................... 11
SMK V SB 33 Plus VESA Mounting Kit .............. 19
Installation ..................................................... 19
Operation................................................. 25
SB 33 A Internal Amplifier Front Panel (Inside Right
Speaker Module) .............................................. 25
Internal Adjustments.......................................... 28
Setting Bass and Treble................................. 29
Reference Information............................. 30
Defeating the Auto Power-down Timer .............. 30
Troubleshooting................................................. 32
Amplifier Fails to Exit Standby Mode Promptly32
Amplifier Enters Standby Mode Too Early....... 33
Extron Warranty ....................................... 35
viiSB 33 A Series User Guide • Contents

SB 33 A Series User Guide • Contents viii

SB 33 A Series User Guide • Introduction 1
Introduction
This section gives an overview of the Extron SB 33 A Series Sound Bar Speaker. Topics
include:
• About this Guide
• Product Description
• Features
• Application Example
About this Guide
This guide describes the installation and set up of the SB 33 A Series Speaker.
NOTE: Observe all applicable building codes and local ordinances when installing the
SB 33 A speaker.
In this guide, the terms “speaker” and “sound bar” are used interchangeably to refer to the
SB 33 A Series Sound Bar Speaker.
Product Description
The SB 33 A is an adjustable-width sound bar speaker for use in small-to-medium
conference rooms. It will feature two 3-inch full range speaker drivers, driven by an internal
amplifier module. The SB 33 A speaker accepts balanced and unbalanced stereo input
signals on three individually buffered inputs.
The SB 33 A is configurable for use with an internal webcam using the built-in adjustable
shelf and window with a built-in door. It can also be configured to mount a PTZ camera with
optional shelf, or configured for no camera with the optional blank center grille. The SB 33 A
sound bar enclosure is adjustable to match the width of the display and is mounted under
the display. The SB 33 A will be offered in four different sizes to accommodate screen sizes
from 46 inches to 80 inches (see table 1).
Option Fit Display Size (diagonal) Fit Display Width Speaker Module Width
SB 33 A 46-55 46"— 55"40"— 49" (101.6 cm — 124.5 cm) 16.25" (41.3 cm)
SB 33 A 55-65 55"— 65"48"— 57" (121.9 cm — 144.8 cm) 20.25" (51.4 cm)
SB 33 A 65-70 65"— 70"56"— 65" (142.2 cm — 165.1 cm) 24.25" (61.6 cm)
SB 33 A 75-80 75"— 80"64"— 73" (162.6 cm — 185.4 cm) 28.25" (71.8 cm)
Table 1. SB 33 A Series Table

SB 33 A Series User Guide • Introduction 2
40"- 49"
SB 33 A 46-55
48"- 57"
SB 33 A 55-65
56"- 65"
SB 33 A 65-70
64"- 73"
SB 33 A 75-80
Figure 1. SB 33 A Series Model Options
The SB 33 A supports mounting directly to the wall under the display using the included
wallplate. It can also be attached to an articulating display mount using the optional VESA
mounting kit.
Features
• Provides enhanced audio quality for collaboration spaces
• Adjustable width to match the display — Perfectly matches the width of any display
from 46” to 80”
• Configurable for an internal webcam, a PTZ camera, or no camera — Suitable
for self-contained huddle spaces or video conference rooms
• 3” (76 mm) full-range drivers with a tuned port for bass extension — Optimized
for collaboration applications
• Frequency range: 100 Hz to 20 kHz
• Internal Extron ENERGY STAR qualified Class D amplifier —High performance
stereo amplifier with CDRS, automatic clip limiter, and auto power-down with fast
power-up
• Compatible with VCM series volume and mute controllers —Can be used
without a control system
• Compatible with select MLC controllers that include VCM volume and mute
ports
• Internal level, bass, and treble adjustments —Once set, these controls are hidden
and protected from tampering
• Optional VESA mounting kit
• ADA compliant when used with the included wall bracket —Protrudes less than
four inches from the wall
1

SB 33 A Series User Guide • Introduction 3
Application Example
The following diagram shows a typical SB 33 A Series installation.
Extron
ANT A ANT B
ShareLink 250 W
1 2
USB
HCR 102
CONFIG
1
SIGNAL
HDCP
LPCM-2CH
MULTI-CH
1
R
INPUT AUDIO MENU
ENTER
HOLD FOR 720p/1080p
HCT 103
2
INPUTS
2 3 4
SIGNAL
HDCP
3 4
Extron
ShareLink 250 W
Wireless Collaboration
Gateway
Extron
HC 404
Receiver
Extron
HC 404
Transmitter
Laptop Laptop
CATx Cable
up to 230' (70m)
HDMI
HDMI/CEC
HDMIHDMI
Laptop
VGA
Analog Audio
Analog Audio
55'' Display
Extron
SB 33 A 55-65
Sound Bar
Figure 2. An Example of a SB 33 A System Installation
2

SB 33 A Series User Guide • Installation 4
Installation
Topics covered in this section of the guide include the following:
• Installation Overview
• Mounting Instructions
• SMK V SB 33 Plus VESA Mounting Kit
Installation Overview
The installation of the SB 33 A speaker includes using the included wallplate to mark the
wall where the SB 33 A will be mounted. After the wallplate is attached to the wall the SB 33
A is then attached to the wallplate. The following section describes the mounting procedure
for safely and securely mounting the speaker.
NOTE: Install the wallplate onto wall material using common installation methods with
applicable hardware dictated per local building code.
Mounting Instructions
WARNING: Risk of personal injury or property damage. The final installation
should be able to continuously support the speaker weight. The final installation
should also be able to support any short term overloading. Since applications can
vary considerably, it is assumed that the installer will exercise good judgment when
selecting the mounting location, method, and hardware. Installation and service must
be performed by authorized personnel only.
AVERTISSEMENT : Risque de dommages corporels ou matériels. L’installation
finale doit pouvoir supporter en permanence le poids de l’enceinte. L’installation
finale doit également supporter toute surcharge temporaire. Étant donné la possibilité
d’évolution considérable des applications, il est supposé que l’installateur fera preuve
de discernement lors de la sélection de l’emplacement, du mode, et du matériel de
montage. L’installation et la maintenance du système doivent être exclusivement
effectuées par le personnel autorisé.
NOTE: Observe all applicable building codes and local ordinances when installing the
SB 33 A speaker.
Installing the Wallplate on a Non-masonry Wall
NOTE: When attaching the wallplate to masonry, see Installing the Installing the
Wallplate on a Masonry Wall on page7.
1. Position and level the included wallplate under the display screen (see figure3 and
figure4 on the next page) and mark the locations of the wall studs through the top
vertical slots and bottom horizontal slots where screws (not included) will secure the
SB33 A speaker wallplate to the wall.

SB 33 A Series User Guide • Introduction 5
NOTES:
• If the wallplate cannot be attached to two studs, the wallplate can be offset
such that one side of the wallplate can be attached to one stud and the other
end of the wallplate can be attached to the wall using two (not included) 1/4"
Kap Toggles.
• If the stud must come down the middle of the wallplate, secure the wallplate
to the stud using two screws and to the wall using two (not included) 1/4"
Kap Toggles (one on the leftmost top slot and one on the right-most top slot)
• The center of the wallplate does not need to be precisely aligned with the
center of the display above it because the speaker module on either end of
the wallplate can be adjusted on the wallplate.
2. If necessary, cut a hole in the wall to route cables to the SB 33 A speaker.
Figure 3. Positioning the Wallplate
Display
Left Speaker ModuleCenter
Bracket
Right Speaker Module
Figure 4. Display Screen and SB 33 A Alignment
NOTES:
• Assuming that the display screen is level, allow for some space between the
bottom of the display screen and the top of the speaker because the speaker
assemblies and the center bracket attach to the wallplate by hooking the top
mounting clasps of the speaker assemblies and center bracket over the top
mounting rail of the wall plate.
• To allow sufficient clearance between the top of the SB 33 A and the display
screen above it, allow for at least a minimum clearance of 11/16 inches
(17.5mm) between the highest part of the top rail of the wallplate and the top
of the speaker, as shown below. The display screen should not encroach into
this area above the top rail.
3
4

SB 33 A Series User Guide • Introduction 6
INPUTS
POWER
MAX
12V
0.7A
OUTPUT
REMOTE
V
L
LRLEVEL BASS TREBLE
R
CG
10V 50mA
CLASS 2 WIRING
L SPEAKER
Wallplate
Side View
11/16"
(17.5 mm)
Wall
Minimum clearance between top of wallplate
and bottom of display is 11/16" (17.5 mm).
Figure 5. Positioning the Wallplate
3. Before starting the installation, remove the center section assembly from the packaging
and disassemble as indicated in the following order:
Screws (2)
Grille
Center Section Cover
Lock Washers (2)
Center Bracket
Screws (2)
Web Camera
Mount
Grille Hoo
k
Figure 6. Disassembling the Center Section Assembly
a. The front grille from the center section cover using a grille hook.
b. The center section cover from the center bracket standoffs by removing the 2
screws
c. The web camera mount from the center bracket (if necessary) by removing the two
screws and lock washers that attach it to the center bracket.
4. Drill four pilot holes through the marked locations on the wall.
5. Screw the wallplate to the wall studs using four #14 x 1 3/4”self-tapping wood or metal
screws and four 1/4”SAE washers into the pilot holes.
5
6

SB 33 A Series User Guide • Introduction 7
NOTE: Use wood or metal screws depending on whether the studs are wood or
metal.
Wall Stud
Wallplate
1/4" SAE Washer (x4)
#14 x 1 3/4" Self-tapping
Metal/Wood Screws (x4)
Figure 7. Attach the Wallplate to Studs
Installing the Wallplate on a Masonry Wall
Mount the wallplate on a brick, stone, or concrete wall by doing the following:
NOTE: The center of the wallplate does not need to be precisely aligned with the center
of the display above it because the speakers on either end of the wallplate may still be
adjustable on the wallplate.
1. Follow steps 1 to 3 of Installing the Wallplate on a Non-masonry Wall starting on
page4.
NOTE: Because masonry installation does not involve wall studs, position the
wallplate so that the mounting holes will evenly distribute the weight of the
SB 33 A.
2. Using a masonry drill bit, drill four pilot holes in the masonry wall at the locations you
marked in step one.
NOTE: If you drill the pilot hole too shallow, the screw head might break off while it
is being fastened into the hole.
7

SB 33 A Series User Guide • Introduction 8
Mounting Holes
Mounting Holes
Wallplate
Figure 8. Positioning the Wallplate on Masonry
3. For each pilot mounting hole:
a. Insert a 1/4”x 1 3/4”masonry screw through a 1/4”SAE washer.
b. Position the wallplate over the pilot holes
c. Insert each screw and washer through the wallplate and into the pilot hole.
Wallplate
1/4" SAE Washer (x4)
1/4" x 1 3/4"
Masonry Screws (x4)
Figure 9. Attaching the Wallplate to Masonry
d. Securely tighten the four screws to the wallplate.
8
9

SB 33 A Series User Guide • Introduction 9
Attaching the SB 33 A to the Wallplate
ATTENTION: When attaching either speaker assembly or the center section to the
wallplate, avoid damaging or scratching the speaker assembly and center section
cover.
ATTENTION : Lorsque vous fixez les enceintes ou la section centrale à la plaque
murale, prenez garde à ne pas endommager ni à rayer les enceintes et le couvercle
de la section centrale.
1. Hook the top clasp edge of the left speaker assembly over the top rail 1 in figure10 of
the wallplate and slide it to left end of the wallplate 2so that the left end of the speaker
assembly is aligned with the left end of the display.
Tighten the 2 set screws 3 on the bottom of the left speaker assembly to the bottom rail
of the wallplate.
Wallplate Screws (2)
Left Speaker
1
1
1
3
3
3
DISPLAY
Left Speaker Wallplate
Side View Side ViewFront View
Wall Wall
2
2
2
Figure 10. Attaching the Left Speaker to the Wallplate
2. Hook the top clasp edge of the right speaker assembly over the top rail 1in figure11
of the wallplate and slide it to right end of the wallplate 2so that the right end of the
speaker assembly is aligned with the right end of the display.
Tighten the 2 set screws 3on the bottom of the right speaker assembly to the bottom
rail of the wallplate.
INPUTS
POWER
MAX
12V
0.7A
OUTPUT
REMOTE
V
L
LRLEVEL BASS TREBLE
R
CG
10V 50mA
CLASS 2 WIRING
L SPEAKER
INPUTS
POWER
MAX
12V
0.7A
OUTPUT
REMOTE
V
L
L
RLEVEL BASS TREBLE
R
C G
10V 50mA
CLASS 2 WIRING
L SPEAKER
Side View Side ViewFront View
Screws (2
)
3
3
3
Right Speaker
Wallplate
2
2
2
DISPLAY
Wall Wall
Wallplate
Right Speaker
1
1
1
Figure 11. Attaching the Right Speaker to the Wallplate
3. Route the supplied power cable from the power supply in the left speaker enclosure to
the power input connector of the amplifier in the right speaker enclosure.
10
11

SB 33 A Series User Guide • Introduction 10
INPUTS
POWER
MAX
12V
0.7A
OUTPUT
REMOTE
V
L
LRLEVEL BASSTREBLE
R
CG
10V 50mA
CLASS2 WIRING
LSPEAKER
POWER
12V
0.7A MAX
Left Speaker Module
Power Supply
Right Speaker Module
Amplifier
DC Power
Input
DC Power Cord
Captive Screw
Connectors
Tie
Wraps
DC Power
Outputs
Figure 12. Power Supply to Amplifier Cable Routing
ATTENTION:
• Always use a power supply supplied by or specified by Extron. Use of an
unauthorized power supply voids all regulatory compliance certification and
may cause damage to the supply and the end product.
• The installation shall be in accordance with the applicable provisions of
National Electrical Code ANSI/NFPA 70, article 725 and the Canadian
Electrical Code part1, section 16.
• The length of the exposed wires in the stripping process is critical. The ideal
length is 3/16 inches (5 mm). Any longer and the exposed wires may touch,
causing a short circuit between them. Any shorter and the wires can be
easily pulled out even if tightly fastened by the captive screws.
ATTENTION :
• L’utilisation d’une source d’alimentation non autorisée annule toute
certification de conformité réglementaire, et peut endommager la source
d’alimentation et l’unité.
• Cette installation doit toujours être conforme aux dispositions applicables
du Code américain de l’électricité (National Electrical Code) ANSI/NFPA 70,
article 725, et du Code canadien de l’électricité, partie 1, section 16.
• La longueur des câbles exposés est primordiale lorsque l’on entreprend de
les dénuder. La longueur idéale est de
5 mm (3/16 inches). S’ils sont trop longs, les câbles exposés pourraient se
toucher et provoquer un court-circuit. S’ils sont trop courts, ils peuvent être
tirés facilement, même s’ils sont correctement serrés par les borniers à vis.
NOTE: Do not tin the wires. Tinned wire does not hold its shape and can become
loose over time.
4. Route the supplied speaker cable from the left speaker module to the left speaker
output of the amplifier (2), as shown in figure13 on page11.
12

SB 33 A Series User Guide • Introduction 11
e
INPUTS
OUTPUT
V
LEVEL BASS TREBLE
C
10V 5
CLASS 2 WIRING
L SPEAKER
e
INPUTS
WER
MAX
L
LRLEVEL
R
Right Speaker Amplifier
Side View
Front View
Amplifier
Audio Input
Connectors
Speaker Cable Left Speaker Cable
Output
Speaker Cable
Power Cable
2
2
2
1
1
1
Figure 13. Left Speaker Cable Routing
5. Hook the top clasp edge of the center bracket over the top rail (1) of the wallplate and
slide it to center of the display.
POWER
12V
0.7AMAX
INP
Screws (2)
2
2
2
1
1
1
Wallplate
Center Bracket
Side View
Side View
Wall
Wall
Figure 14. Center Bracket to Wallplate Installation
Tighten the two set screws (2) on the bottom of the center bracket to the bottom rail of
the wallplate.
NOTE: If a camera is to be mounted to the center bracket, see Mounting a
Camera before proceeding to the next step.
Mounting a Camera
The SB 33 A speaker can accommodate a camera mounted to the center bracket. A
small webcam can be mounted behind the center cover, and a larger PTZ camera can be
mounted in front of the center cover using an optional PTZ camera shelf.
NOTE: If mounting a PTZ Camera, please go to Mounting a PTZ camera with
optional PTZ camera shelf on page13. Both the webcam camera shelf and the
PTZ camera shelf use the same two attaching screws and lock washers.
13
14

SB 33 A Series User Guide • Introduction 12
Camera mounting behind the front cover
A webcam can be installed using the included webcam shelf.
1. Install the webcam shelf by attaching it to the center bracket using 2 screws going
through the 2 vertical slots on the shelf and into two mounting holes in the bracket.
There are 2 pairs of available holes in the bracket. The shelf height can be adjusted by
positioning the screws in the shelf slots 1.
NOTE: For cameras that require more overhead clearance, the webcam shelf can
be inverted (see Option 2 below right in figure15).
POWER
12V
0.7AMAX
INP
Screws (2)
Lock Washers (2)
Web Camera
Mount
Center
Bracket
1
1
1
Option 2
Figure 15. Inverting the Webcam Shelf
2. A screw is inserted in the bottom slot of the shelf 2to secure the webcam.
POWER
12V
0.7AMAX
INP
Screw
Webcam
2
2
2
Figure 16. Securing the Webcam to Shelf
3. To continue the installation, go to Attaching Power and Audio Sources to the
SB33A on page15.
15
16