User Guide
SM 28
Speakers
SpeedMount
®
Surface Mount Speakers
68-2165-01 Rev. A
07 15
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.
Instructions de sécurité • Français
AVERTISSEMENT : Ce pictogramme, , lorsqu’il est utilisé sur le
produit, signale à l’utilisateur la présence à l’intérieur du boîtier du produit
d’une tension électrique dangereuse susceptible de provoquer un choc
électrique.
ATTENTION : Ce pictogramme, , lorsqu’il est utilisé sur le produit, signale
à l’utilisateur des instructions d’utilisation ou de maintenance importantes
qui se trouvent dans la documentation fournie avec le matériel.
Pour en savoir plus sur les règles de sécurité, la conformité à la réglementation,
la compatibilité EMI/EMF, l’accessibilité, et autres sujets connexes, lisez les
informations de sécurité et de conformité Extron, réf. 68-290-01, sur le site
Extron, www.extron.com.
Sicherheitsanweisungen • Deutsch
WARNUNG: Dieses Symbol auf dem Produkt soll den Benutzer darauf
aufmerksam machen, dass im Inneren des Gehäuses dieses Produktes
gefährliche Spannungen herrschen, die nicht isoliert sind und die einen
elektrischen Schlag verursachen können.
VORSICHT: Dieses Symbol auf dem Produkt soll dem Benutzer in der
im Lieferumfang enthaltenen Dokumentation besonders wichtige Hinweise
zur Bedienung und Wartung (Instandhaltung) geben.
Weitere Informationen über die Sicherheitsrichtlinien, Produkthandhabung,
EMI/EMF-Kompatibilität, Zugänglichkeit und verwandte Themen finden Sie in
den Extron-Richtlinien für Sicherheit und Handhabung (Artikelnummer
68-290-01) auf der Extron-Website, www.extron.com.
Instrucciones de seguridad • Español
ADVERTENCIA: Este símbolo, , cuando se utiliza en el producto,
avisa al usuario de la presencia de voltaje peligroso sin aislar dentro del
producto, lo que puede representar un riesgo de descarga eléctrica.
ATENCIÓN: Este símbolo, , cuando se utiliza en el producto, avisa
al usuario de la presencia de importantes instrucciones de uso y
mantenimiento recogidas en la documentación proporcionada con el
equipo.
Para obtener información sobre directrices de seguridad, cumplimiento
de normativas, compatibilidad electromagnética, accesibilidad y temas
relacionados, consulte la Guía de cumplimiento de normativas y seguridad de
Extron, referencia 68-290-01, en el sitio Web de Extron, www.extron.com.
Инструкция по технике безопасности • Русский
ПРЕДУПРЕЖДЕНИЕ: Данный символ, , если указан
на продукте, предупреждает пользователя о наличии
неизолированного опасного напряжения внутри корпуса
продукта, которое может привести к поражению
электрическим током.
ВНИМАНИЕ: Данный символ, , если указан на продукте,
предупреждает пользователя о наличии важных инструкций
по эксплуатации и обслуживанию в руководстве,
прилагаемом к данному оборудованию.
Для получения информации о правилах техники безопасности,
соблюдении нормативных требований, электромагнитной
совместимости (ЭМП/ЭДС), возможности доступа и других
вопросах см. руководство по безопасности и соблюдению
нормативных требований Extron на сайте Extron: www.extron.com,
номер по каталогу - 68-290-01.
安全说明 • 简体中文
警告： 产品上的这个标志意在警告用户该产品机壳内有暴露的危险 电压，
有触电危险。
注意： 产品上的这个标志意在提示用户设备随附的用户手册中有
重要的操作和维护(维修）说明。
关于我们产品的安全指南、遵循的规范、EMI/EMF 的兼容性、无障碍
使用的特性等相关内容，敬请访问 Extron 网站 www.extron.com，参见
Extron 安全规范指南，产品编号 68-290-01。
安全記事 • 繁體中文
警告: 若產品上使用此符號，是為了提醒使用者，產品機殼內存在著
可能會導致觸電之風險的未絕緣危險電壓。
注意: 若產品上使用此符號，是為了提醒使用者，設備隨附的用戶手冊中有重
要的操作和維護（維修）説明。
有關安全性指導方針、法規遵守、EMI/EMF 相容性、存取範圍和相關主題的詳細資
訊，請瀏覽 Extron 網站：www.extron.com，然後參閱《Extron 安全性與法規
遵守手冊》，準則編號 68-290-01。
安全上のご注意 • 日本語
警告: この記号 が製品上に表示されている場合は、筐体内に絶縁されて
いない高電圧が流れ、感電の危険があることを示しています。
注意: この記号 が製品上に表示されている場合は、本機の取扱説明書
に 記載されている重要な操作と保守(整備)の指示についてユーザーの
注 意を 喚 起 するも ので す。
安全上のご注意、法規厳守、EMI/EMF適合性、その他の関連項目に
つ いて は 、エクストロン の ウェブサ イト www.extron.com よ り 『 Extron Safety
and Regulatory Compliance Guide』 (P/N 68-290-01) をご覧ください。
안전 지침 • 한국어
경고: 이 기호 가 제품에 사용될 경우, 제품의 인클로저 내에 있는
접지되지 않은 위험한 전류로 인해 사용자가 감전될 위험이 있음을
경고합니다.
주의: 이 기호 가 제품에 사용될 경우, 장비와 함께 제공된 책자에 나와
있는 주요 운영 및 유지보수(정비) 지침을 경고합니다.
안전 가이드라인, 규제 준수, EMI/EMF 호환성, 접근성, 그리고 관련 항목에
대한 자세한 내용은 Extron 웹 사이트(www.extron.com)의 Extron 안전 및
규제 준수 안내서, 68-290-01 조항을 참조하십시오.
FCC Class B Notice
This equipment has been tested and found to comply with the limits for a
ClassB digital device, pursuant to part15 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.
NOTE: 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.
Copyright
© 2015 Extron Electronics. All rights reserved.
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
RGBSystems, Inc. or Extron Electronics:
Registered Trademarks
(®)
AVTrac, Cable Cubby, CrossPoint, eBUS, EDID Manager, EDID Minder, Extron, Flat Field, FlexOS, Global Configurator, GlobalViewer, Hideaway,
Inline, IPIntercom, IPLink, KeyMinder, LockIt, MediaLink, PlenumVault, PoleVault, PowerCage, PURE3, Quantum, SoundField, SpeedMount,
SpeedSwitch, SystemINTEGRATOR, TeamWork, TouchLink, V-Lock, VersaTools, VN-Matrix, VoiceLift, WallVault, WindoWall, XTP, and XTP
Systems
Registered Service Mark
(SM)
: S3 Service Support Solutions
Trademarks
(
™
)
AAP, AFL (Accu-RateFrameLock), ADSP(Advanced Digital Sync Processing), Auto-Image, CableCover, DRS(ClassDRippleSuppression),
DDSP (Digital Display Sync Processing), DMI (DynamicMotionInterpolation), DriverConfigurator, DSPConfigurator, DSVP(Digital Sync
Validation Processing), DTP. eLink, EQIP, FastBite, FOX, FOXBOX, IP Intercom HelpDesk, LinkLicense, MAAP, MicroDigital, NetPA, ProDSP,
QS-FPC(QuickSwitch Front Panel Controller), Room Agent, Scope-Trigger, ShareLink, SIS, Simple Instruction Set, Skew-Free, SpeedNav,
Triple-Action Switching, True4K, Vector, Webshare, XTRA, ZipCaddy, ZipClip
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.
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 http://www.extron.com/technology/glossary.aspx.
SM 28 Surface Mount Speaker • Contents v
Contents
Introduction .................................................... 1
About this Guide ................................................. 1
About the SM 28 Surface Mount Speaker .......... 1
Features ............................................................. 2
Application Diagram ........................................... 3
Installation ...................................................... 4
Installing the Speaker Mounting Plate ................. 5
Mounting to a Wall Stud ..................................... 6
Mounting the SM 28 Using the Yoke Mount
Kit ................................................................... 11
Attaching a Secondary Support Cable .............. 11
Attaching the Speaker to the Mounting Plate .... 12
Setting the Tap Selector Switch (SM 28T
Model Only) ..................................................... 13
Using the Security Key to Lock and Unlock
the Speaker ..................................................... 14
Removing the Speaker from the Mounting
Plate ................................................................ 15
Contents
SM 28 Surface Mount Speaker • Contents vi
SM 28 Surface Mount Speaker • Introduction 1
Introduction
This section gives an overview of the Extron SM 28 SpeedMount Surface Mount Speaker.
Topics include:
• About this Guide
• About the SM 28 Surface Mount Speaker
• Features
• Application Diagram
About this Guide
This guide describes the Extron SM 28 surface mount speaker and discusses how to install,
configure, and operate it.
In this guide, the terms “SM 28” and “speaker” refer to the SM 28 surface mount speaker.
About the SM 28 Surface Mount Speaker
The Extron SM 28 SpeedMount Surface Mount Speaker is a two-way speaker with a
patent-pending, concealed wall mounting system. It features an 8-inch (20.3 cm) woofer
with dual tuned ports and a 1.1-inch (2.8 cm) tweeter. Speaker mounting incorporates a
separate mounting plate that can be attached directly to a wall. The speaker wiring attaches
to the mounting plate so that the speaker can easily slide into the mounting plate, making
electrical contact between the plate and the contacts on the speaker. A built-in locking
mechanism between the speaker and the mounting plate also prevents the speaker from
being removed by unauthorized personnel. A release on the speaker baffle allows for
quick removal from the mount. The release is lockable and hidden, and together with the
concealed speaker wiring contacts, helps to deter theft.
SM 28 Surface Mount Speaker • Introduction 2
Features
• SM 28 and SM 28T — The SM 28 is available as an 8 ohm model, and an SM 28T
version which can operate in 8 ohm direct as well as 70 volt and 100 volt modes.
• Six-position power tap selector — The SM 28T features a six-position power tap
selector for up to 64 watts, which can conveniently be accessed through the grille from
outside the speaker.
• Patent pending, concealed mounting system — One installation step connects the
speaker to the wiring contacts, and secures it into place.
• Include 0° mounting plate and 10° mounting adapter — Four position 10°
mounting adapter attaches to 0° mounting plate, and provides flexibility for vertical or
horizontal speaker installation with 10° of tilt downward, upward, left, or right.
• Designed to accommodate division-of-labor installations and save costs
• 1.1-inch (2.8 cm) silk dome tweeter
• 8" (20.3 cm) long-throw woofer with dual tuned bass reflex ports
• Two versions available for low impedance or 70/100 volt systems:
• 8 ohm direct operation only
• 8 ohm direct and 70/100 volt operation
• Convenient six-position, through-the-grille power tap selector on the SM 28T:
• 8 ohm direct
• 70 volt: 64, 32, 16, and 8 watt selectable
• 100 volt: 64, 32, and 16 watt selectable
• Off
• Optional yoke mount allows 180° of speaker pivot in 10° detented steps
• Frequency range: 59 Hz to 22 kHz
• 90 watts continuous pink noise, 180 watts continuous program
• Internal driver overload protection
• Hidden locking speaker release mechanism
• Mounting plate provides cable raceway access for surface-mounted wiring
applications
• Black or white high-impact enclosure
• Dimensions with 0° mounting plate: 16.5" H x 11.5" W x 7.8" D (41.91 cm H x
29.21 cm W x 19.81 cm D)
• 5 year parts and labor warranty
SM 28 Surface Mount Speaker • Introduction 3
100-240V ~ 50/60 Hz
-- A MAX
1
2
CONFIGURABLE
HDMI
IN1606
HDMI
5
6
HDMI
A
B
3
4
INPUTS OUTPUTS AUDIO INPUTS OUTPUTS REMOTE
L 1
R
L 2
R
L 3
R
L 4
R
L 5
R
+48V
+48V
1 2
L R
VARIABLE
Tx Rx
RS-232
G
LAN
RESET
1
2
MIC/LINE
L 6
R
100-240V 0.5A, 50-60Hz
XPA 1002 Plus
1
2
LIMITER/PROTECT
SIGNAL
0
2
4
6
8
10
12
18
14
26
∞
0
2
4
6
8
10
12
14
∞
21
ATTENUATION
8Ω / 4Ω OUTPUTS
REMOTE
INPUTS
CLASS 2 WIRING
1
2
G
GCV
1
2
10V 50mA
STANDBY
POWER
12V
x.xA MAX
G
Tx Rx RTS CTS
COM 1
G
Tx Rx
G
Tx Rx
COM 2
COM 3
1
S G
S G
2
IR/SERIAL
RELAYS
1 2 C
3 4 C
1 2 3 4 G
DIGITAL I/O
PWR OUT = 6W
eBUS
+V+ S
-S
G
LAN
1 2 3
IPCP PRO 350
Extron
Extron
Extron
Extron
Help
System
Off
Display
Room
Control
Off
Mute
Screen
Lighting
December 15, 2013 - 7:58 AM
Audio
Control
Volume
Mute
Tuner
1 2 3
VCR
Laptop
PC
DVD
Doc
Cam
Tuner
On
Channel
Last
Presets
More
Presets
3
2
1
6
5
4
9
8
7
Enter
0
ETV
Ethernet
RS-232
Ethernet/PoE
Extron
IN1606
Scaling Presentation
Switcher
TCP/IP
Network
Display with Speakers
Display with Speakers
Microphones
1 and 2
Blu-ray
Laptop
Laptop
VGA
Audio
Audio
Audio
Audio
Audio
Extron
XPA 1002 Plus
Power Amplier
Extron
SM 28
Surface Mount
Speakers
S-video
HDMI
HDMI with
Embedded Audio
HDMI with
Embedded
Audio
HDMI with
Embedded
Audio
Audio
Document
Camera
PC
DisplayPort
to HDMI
Adapter
Extron
TLP Pro 720T
7" Tabletop
TouchLink Pro
Touchpanel
Extron
IPCP Pro 350
IP Link Pro
Control Processor
Application Diagram
The following diagram shows an example of how the SM 28 surface mount speakers can be
connected.
Figure 1. Application Diagram for the SM 28 Surface Mount Speakers
SM 28 Surface Mount Speaker • Installation 44
Installation
NOTE: Unless otherwise stated, mounting hardware is not included.
This section describes the installation and setup of the SM 28 surface mount speaker.
Topics include:
• Installating the Speaker Mounting Plate
• Mounting to a Wall Stud
• Yoke Mounting the SM 28
• Attaching a Secondary Support Cable
• Attaching the Speaker to the Mounting Plate
• Setting the Tap Selector Switch (SM 28T Model Only)
• Using the Security Key to Lock and Unlock the Speaker
• Removing the Speaker from the Mounting Plate
WARNING: All structural steps and electrical installation must be performed by qualified
personnel in accordance with local and national building codes and electrical
codes. Since applications can vary considerably, it is the responsibility of the
installer to exercise good judgment when selecting the mounting location, method,
and hardware. Extron is not responsible for damages resulting from the negligent
installation of any mount or speaker.
AVERTISSEMENT : Toute étape structurelle et installation électrique, doit être
effectuée par un personnel qualifié, conformément aux codes du bâtiment, aux codes
incendie et sécurité, et aux codes électriques, locaux et nationaux. Étant donné
l’éventuelle variation importante des applications, il incombe à l’installateur d’agir avec
discernement lors de la sélection de l’emplacement, de la méthode et du matériel de
montage. Extron ne sera pas tenu responsable des éventuels dommages résultant de
la mauvaise installation des attaches de montage ou des enceintes.
SM 28 Surface Mount Speaker • Installation 5
Installing the Speaker Mounting Plate
The SM 28 speaker comes with a flat mounting plate and an adapter for positioning the
speaker 10° up, down, left, or right.
• 0° mounting plate — The flat (0°) mounting plate allows the speaker to be mounted flat
on a suitable surface.
• 10° mounting adapter — The 10° mounting adapter allows the speaker to be installed
at a 10 degree angle so that the speaker can be pointed up, down, left, or right from an
elevated position by rotating the adapter.
0° Mounting Plate
10° Mounting Adapter
Figure 2. Mounting Adapter and Mounting Plate
The mounting plate can be installed vertically or horizontally, as shown below.
Catch Tab
Vertical Mounting
Figure 3. Positioning the Mounting Plate
NOTE: Observe all applicable building codes and local ordinances when installing the
speaker.
Horizontal Mounting
SM 28 Surface Mount Speaker • Installation 6
Mounting to a Wall Stud
NOTE: Mounting hardware not provided.
1. Locate the wall stud where the mounting plate will be installed.
2. If using the 10° mounting adapter, position the adapter to the wall stud according to how
the speaker will be angled and mark the positions of the pilot holes. See the figure below
for mounting hole locations.
Mounting
Holes
Figure 4. Mounting the Adapter
If not using the adapter, position the mounting plate against the wall. The #28 arrow
molded into the mounting plate indicates the vertical midpoint of the SM 28 speaker
when it is mounted on a wall stud. While positioning the mounting plate on the wall,
mark the location of two pilot holes using the holes indicated below.
33-0000-01 Rev. Ax1
IN
–
LOOP
–
IN
+
LOOP
+
SM28 Speaker
Stud
Mounting
Holes
Figure 5. Positioning the Mounting Plate
NOTE: A speaker wire access hole (see figure 6 on the next page, and figure 8
on page 8) must also be cut in the wall, so mark that hole location now with the
mounting plate positioned on the wall while ensuring that the wall stud does not
interfere with the wire routing and that the mounting plate hides the access hole.
3. Drill the mounting plate pilot holes and cut the speaker wire access hole, as previously
marked.
4. Install the speaker cables into the wall before installing the speaker mounting plate.
Leave enough slack in the cable.
5. The SM 28 can be mounted with or without the 10° mounting adapter. In either case,
the wiring of the quick connect contacts remains the same, but the wire routing will vary.
SM 28 Surface Mount Speaker • Installation 7
Routing the wires without the 10° mounting adapter
Route the speaker cable through the rear of the 0° mounting plate and attach the wire
ends to the quick connect contacts using a small screwdriver, as shown below. Be sure
to observe the correct polarity.
Quick Connect Contacts
Figure 6. Routing the Wires Without the Mounting Adapter
Red Wire (+) from Amplifier
Black Wire (-) from Amplifier
Red Wire (+) from
Amplifier/Previous Speaker
Red Wire (+) to Next Speaker
Black Wire (-) from
Amplifier/Previous Speaker
Black Wire (-) to Next Speaker
LOOPIN INLOOP
LOOPIN INLOOP
Number of Wires
per Connection Point
Maximum
Wire Gauge
1 12 AWG
2 16 AWG
4 18 AWG
Wire Gauge Table
Loop-through Connection
Single speaker Connection
Figure 7. Wiring the Connectors
Number of Wires
per Connection Point
Maximum
Wire Gauge
1 12 AWG
2 16 AWG
4 18 AWG
Wire Gauge Table
SM 28 Surface Mount Speaker • Installation 8
Routing the wires with the 10° mounting adapter
Route the speaker cable through the 10° mounting adapter and the 0° mounting plate,
and attach the adapter to the 0° mounting plate using the four included screws and
washers, as shown below. Then, attach the wire ends to the quick connect contacts
using a small screwdriver, as shown below.
10° Mounting
Adapter
0° MountingPlate
(4) 4-40 x 3/16"
Screws
Quick Connect Contacts
Figure 8. Routing Wires Through the Adapter and Plate
NOTE: If surface mounting, route wires through alternate access points.
0° Mounting Plate
Alternate Access Point
Alternate Access Points
10° Mounting Adapter
33-0000-01 Rev. Ax1
IN
–
LOOP
–
IN
+
LOOP
+
Figure 9. Routing Wires Through Alternate Access Points
SM 28 Surface Mount Speaker • Installation 9
6. Attach the mounting plate to the wall, as shown below.
ATTENTION:
• Use the appropriate mounting screws. The screw heads must not protrude
more than 0.27 inch (7 mm) above the screw holes in the mounting plate (see
the figure below). If the screw head protrudes too far above the mounting plate
surface, damage to the speaker may occur when the speaker is attached.
• Utilisez les vis de montage appropriées. Les têtes de vis ne doivent pas
dépasser plus de 7 mm (0,27 pouces), au-dessus des trous de vis situés
dans la plaque de montage (voir figure de droite). Si la vis dépasse largement
la surface de la plaque de montage, l’enceinte est susceptible de subir des
dommages lors de son rattachement à la plaque.
0.47”
(12 mm)
0.27”
(7 mm)
Good
Bad
Figure 10. Screw Head Clearance
SM 28 Surface Mount Speaker • Installation 10
Figure 11. Attaching the Mounting Plate to the Wall
Mounting Scr
ews
SM 28 Surface Mount Speaker • Installation 11
Mounting the SM 28 Using the Yoke Mount Kit
The SM 28 can be mounted using the optional yoke mount kit. Refer to the Yoke Mount Kit
Setup Guide for installation details.
Attaching a Secondary Support Cable
If a secondary support cable is being attached, attach the cable to the eye bolt, as shown
below. The cable end should be properly swaged.
Secondary
Attachment
Cable
Anchor this end to a
suitable secure point.
A
ttach cable here
and secure.
Figure 12. Attaching the Support Cable
NOTE: Attach the secondary support cable before attaching the 0° mounting plate.
SM 28 Surface Mount Speaker • Installation 12
Attaching the Speaker to the Mounting Plate
ATTENTION:
• By default, the SM 28 speaker is shipped unlocked. When mounting the speaker
to the mounting plate, be sure that the speaker is unlocked. Failure to place
the speaker in the unlocked position will result in damage to the speaker lock
mechanism should an attempt be made to mount a locked speaker (see “Using
the Security Key to Lock and Unlock the Speaker” on page 14).
• Par défaut, l’enceinte SM 28 est livrée en mode déverrouillé. Lors du montage de
l’enceinte sur la plaque de montage, assurez-vous que l’enceinte soit déverrouillée.
Si elle n’est pas déverrouillée avant son montage sur la plaque, elle pourrait subir
des dommages au niveau de son mécanisme de verrouillage (voir « Utiliser la clé de
sécurité pour le verrouillage et le déverrouillage de l’enceinte »).
NOTE: If the secondary attachment point is being used, see the “Attaching a
Secondary Support Cable” on the previous page for installation details before
proceeding further.
Position the rear mounting slot of the speaker above the catch tab of the mounting plate,
then slide the speaker down into the mounting plate until a click is heard indicating that
the speaker is secured in place (see figure below). When properly seated, the speaker
connections are automatically made.
Catch Tab
Vertical Mounting
Figure 13. Attaching the Speaker to the Mounting Plate
SM 28 Surface Mount Speaker • Installation 13
Setting the Tap Selector Switch (SM 28T Model Only)
For the SM 28T model, insert a small screwdriver through the upper left portion of the front
grille, as shown below, to adjust the tap selector switch to the desired setting.
8Ω
70
100
8Ω
Tap Indicator
for 70 volt
Tap Indicator
for 100 volt
Figure 14. Setting the Tap Selector Switch
70V 64 W 32 W 16 W 8 W OFF 8Ω
100V • 64 W 32 W 16 W OFF 8Ω
SM 28 Surface Mount Speaker • Installation 14
Using the Security Key to Lock and Unlock the Speaker
Insert the key into the center of the speaker grille and turn the key, as needed, so that
the speaker is in the unlocked position (see the figure below). There are three small raised
“dimples” (see the figure on the next page) on the grille surface that surrounds the keyhole.
Repeat this procedure, but set the key to the locked position to lock the speaker.
ATTENTION:
• The key must be rotated to the unlocked position before the speaker is attached to
the mounting plate. Failure to place the speaker in the unlocked position will result
in damage to the speaker lock mechanism should an attempt be made to mount
the speaker. By default, the SM 28 speaker is shipped unlocked.
• La clé doit être basculée en mode déverrouillé avant le rattachement de l’enceinte
à la plaque de montage. Si l’enceinte n’est pas placée en mode déverrouillé, elle
pourrait subir des dommages au niveau de son mécanisme de verrouillage lors
de son montage sur plaque. Par défaut, l’enceinte SM 28 est livrée en mode
déverrouillé.
Unlocked
Unlocked
Figure 15. Unlocking the Speaker
Twist to
Lock/Unlock
Unlocked
Locked
Figure 16. Using the Security Key to Lock and Unlock the Speaker
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- français: Extron SM 28 Manuel utilisateur
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