User Guide
SF 26CT LP
Speakers
SoundField
®
XD Low-Profile 6.5" Two-Way Ceiling Speaker
with 4.2" Composite Back Can
68-3443-01 Rev. A
06 20
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.
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.
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.
Istruzioni di sicurezza • Italiano
AVVERTENZA: Il simbolo, , se usato sul prodotto, serve ad
avvertire l’utente della presenza di tensione non isolata pericolosa
all’interno del contenitore del prodotto che può costituire un rischio di
scosse elettriche.
ATTENTZIONE: Il simbolo, , se usato sul prodotto, serve ad avvertire
l’utente della presenza di importanti istruzioni di funzionamento e
manutenzione nella documentazione fornita con l’apparecchio.
Per informazioni su parametri di sicurezza, conformità alle normative,
compatibilità EMI/EMF, accessibilità e argomenti simili, fare riferimento
alla Guida alla conformità normativa e di sicurezza di Extron, cod. articolo
68-290-01, sul sito web di Extron, www.extron.com.
I
Copyright
© 2020 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
ExtronElectronics (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, Flat Field, FlexOS, Glitch Free, Global
Configurator, GlobalScripter, GlobalViewer, Hideaway, HyperLane, IPIntercom, IPLink, KeyMinder, LinkLicense, LockIt, MediaLink,
MediaPort, NetPA, PlenumVault, PoleVault, PowerCage, PURE3, Quantum, Show Me, SoundField, SpeedMount, SpeedSwitch,
StudioStation, SystemINTEGRATOR, TeamWork, TouchLink, V-Lock, VideoLounge, VN-Matrix, VoiceLift, WallVault, WindoWall, XTP,
XTPSystems, and ZipClip
Registered Service Mark
(SM)
: S3 Service Support Solutions
Trademarks
(
™
)
AAP, AFL (Accu-RateFrameLock), ADSP(Advanced Digital Sync Processing), Auto-Image, AVEdge, CableCover, CDRS(ClassD
Ripple Suppression), Codec Connect, DDSP(Digital Display Sync Processing), DMI (DynamicMotionInterpolation), DriverConfigurator,
DSPConfigurator, DSVP(Digital Sync Validation Processing), eLink, EQIP, Everlast, FastBite, FOX, FOXBOX,
IP Intercom HelpDesk, MAAP, MicroDigital, Opti-Torque, PendantConnect, ProDSP, QS-FPC(QuickSwitch Front Panel Controller), Room
Agent, Scope-Trigger, ShareLink, SIS, SimpleInstructionSet, Skew-Free, SpeedNav, Triple-Action Switching, True4K, Vector™ 4K ,
WebShare, XTRA, and ZipCaddy
FCC Class A Notice
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part15 of the FCC rules. The ClassA limits provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause interference; the user must correct the interference at
his own expense.
NOTE: For more information on safety guidelines, regulatory compliances, EMI/EMF compatibility,
accessibility, and related topics, go to http://www.extron.com/68-290-01 on the Extron
website.
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.
Contents
Introduction ..............................................................1
Overview ............................................................ 1
Features ............................................................. 1
Application Example ........................................... 2
Installation in a Suspended Ceiling (Single
Installer) ....................................................................3
Installation Considerations .................................. 3
Preparing the Installation Location ...................... 3
Configuring the Speaker ..................................... 5
Mounting the Speaker ........................................ 9
Installation in a Suspended Ceiling
(Division of Labor) ............................................... 13
Getting Started ................................................. 13
Preparing the Installation Location .................... 14
Configuring the Speaker ................................... 14
Mounting the Speaker Enclosure ...................... 15
Installation in a Hard Ceiling ............................ 20
Preparing the Installation Location .................... 20
Configuring the Speaker ................................... 20
Mounting the Speaker ...................................... 21
Reference Information ....................................... 24
Painting the Speaker Grille ................................ 24
Troubleshooting: Signal Test Points ................... 25
Testing Source Signal (All Configurations) ...... 25
Testing the Impedance (Loop-Through
Configuration Only) ...................................... 25
SF 26CT LP User Guide • Contents v
SF 26CT LP User Guide • Contents vi
Introduction
This section gives an overview of the Extron SF 26CT LP SoundField
®
Low Profile XD 2-way
speaker. Topics include:
• Overview
• Features
• Application Example
Overview
The Extron SoundField® XD model SF 26CT LP is a low profile 6.5” (165 mm) two-way
ceiling speaker featuring a 4.2” (107 mm) deep composite back can for use in restricted
height plenum rated ceiling environments. The driver complement includes a 6.5” (165 mm)
woofer coupled to a 3/4” (19 mm) ferrofluid-cooled dome tweeter. The SF 26CT LP offers
both direct 8 ohm and 70/100 volt operation with a behind-the-grille, six position power
selector switch. With high impedance taps at 8, 16, 32, and 64 watts, the SF 26CT LP is
ideal for applications that require a high power distributed speaker system in smaller plenum
spaces.
Features
• 6.5” (165 mm) long throw woofer
• 3/4” (19 mm) ferrofluid-cooled dome tweeter
• 4.2” (107 mm) deep composite back can for plenum environments
• Frequency range: 85 Hz to 22 kHz, -10 dB, half space
• 111° conical dispersion
• 65 watts continuous pink noise, 130 watts continuous program
• 8 ohm direct or 70/100 volt operation on a 6 position, behind-the-grille selector
• 8 ohm direct
• 70 volt: 64, 32, 16, and 8 watt selectable
• 100 volt: 64, 32, and 16 watt selectable
• Magnetically attached grille with a thin bezel for a refined appearance
• Grille and bezel are white and can be painted to match any environment
• Separable back can and baffle supports both single-trade and division-of-labor
applications
• Modular V-rail and folding C-ring kit included
• Opti-Torque indicator rings prevent overtightening of locking arm screws
• Four locking arms for quick ceiling installation
• UL 2043 plenum rated enclosure
• UL 1480 listed for safety
• 5-year parts and labor warranty
SF 26CT LP User Guide • Introduction 1
Application Example
The application diagram below shows one way to configure a system using the SF 26CT LP.
100-240V 0.7A MAX
50 - 60 Hz
DMP 128 Plus C V
INPUTS
RxTx G
RS-232
2 1
+S+V -S G
GIN
1
O1O2 GIN
2
O1O2 GIN
3
O1O2 GIN
4
O1O2 GIN
5
O1O2 GIN
6
O1O2 GIN
7
O1O2 GIN
8
O1O2
5 6
7 8
11 12
1 2
3
4
9 10
1 2 3 4 5 6 7 8
I/O
OUTPUTS
DMP EXP
ACP
REMOTE
USB AUDIO
RESET
LAN/VoIP
•
P
H
U
S
•
•
P
H
U
S
•
•
P
H
U
S
•
•
P
H
U
S
•
•
P
H
U
S
•
•
P
H
U
S
•
•
P
H
U
S
•
•
P
H
U
S
•
HDCP
SIGNAL
AUTO
SWITCH
DTP T USW 233
CONFIG
1
STATUS
2 3
1 2 3
MODE
NORMAL
AUTO
WiFi
1 2 34
CONFIG
DTP CROSSPOINT 4K SERIES
DIGITAL PRESENTATION SWITCHER
CONTROL I/O
AUDIO
VIDEO
LOGO
SELECT
ENTER PRESET
VIEW
ESC
1
2
3
4
1
2
3
4
5
6
7
8
MIC VOLUME VOLUME
INPUTS
OUTPUTS
eBUS
COM
1 1 2
1 2 23 3 4
1 2
3 4
IR/S I/O
RELAYS
S LIMIT
OVER
RTS
CTS
Tx
Rx
Extron
DMP 128 Plus C V
Digital Matrix Processor
Extron
SF 26CT LP
Full-Range Ceiling Speakers
Conference Table Credenza
Audio
Audio
VoIP
LAN
Extron
DTP CrossPoint 82 4K IPCP MA 70
Scaling Presentation Matrix Switcher
Table
Microphones
Camera
PC
Display
Ethernet
Ethernet
Ethernet
USB Audio
USB Video
HDMI
DMP EXP
Audio
Extron
TLP Pro 1025T
10" Tabletop
TouchLink Pro
Touchpanel
Extron
DTP T USW 233
Transmitter
Laptop
Ethernet/PoE
CATx up to 230' (70 m)
HDMI
HDMI
LAN
Ethernet
LAN
Figure 1. SF 26CT LP Application Diagram
SF 26CT LP User Guide • Introduction 2
Installation in a Suspended
Ceiling (Single Installer)
If a single installer is installing the SF 26CT LP speaker system, follow the steps in this
section. Topics in this section include:
• Installation Considerations
• Preparing the Installation Location
• Configuring the Speaker
• Mounting the Speaker
Installation Considerations
WARNING: Potential risk of severe injury. Installation and service must be
performed by authorized personnel only.
AVERTISSEMENT : Risque potentiel de blessure grave ou de mort. L’installation et
l’entretien doivent être effectués par le personnel autorisé uniquement.
• All wiring and electrical connections must conform to all applicable building codes and
local ordinances.
• Installation in a plenum-rated environment requires plenum-rated cable or conduit.
• If using secondary support cables, the installer provides the cables.
Preparing the Installation Location
1. Power down all attached devices before proceeding.
2. Ensure that there is sufficient clearance above the ceiling tile for the unit to be installed.
3. Cut a hole for the speaker. Use the provided cutout template to outline the hole to be
cut in the ceiling tile as described below.
a. Remove the ceiling tile.
b. To find the center of the tile, use a tape measure to measure the space between
two opposite corners, and mark the half-way point.
c. Position the center hole of the cutout template directly over the center of the tile
that you marked in step3b.
d. Using the provided cutout template, trace a circle around the
cutout template.
e. Cut out the circle traced on the ceiling tile.
f. Replace the tile in the ceiling.
SF 26CT LP User Guide • Installation - Single Installer 3
4. Attach two V-rails and one C-ring across the tile above the hole cut in step 3, as shown
below:
a. Assemble two V-rail half sections as follows: fit the tab of one end into the slot of
the other end, then open the V-rail until it locks together (see figure 2). Repeat this
procedure for the other V-rail.
Figure 2. Assembling the V-rails
b. Remove a ceiling tile adjacent to the tile with the hole.
c. Place both assembled V-rails on the cut ceiling tile and position them equally on
either side of the hole. The ends of the V-rails go over the ceiling grid.
d. Position the C-ring assembly on the two V-rails so that the C-ring is centered over
the hole, as shown below.
V
-rail
C-ring
Figure 3. Positioning the C-ring Assembly on the V-rails
e. Secure the C-ring to the V-rails using two screws.
5. Route the speaker wires through the ceiling tile hole.
SF 26CT LP User Guide • Installation - Single Installer 4
Configuring the Speaker
1. Configure the locking arms for thicker ceilings (optional).
Four speaker locking arms are used to secure the speaker to ceiling tiles up to
2.25 inches (5.72 cm) thick. The locking arms are equipped with removable inserts to
accommodate ceiling tiles up to 1.5 inches (3.81 cm) thick. For ceiling tiles thicker than
1.5 inches, the locking arm inserts must be removed.
To remove the inserts:
a. Using a screwdriver, rotate the locking arm so that the insert can be accessed.
Figure 4. Accessing the Locking Arm Insert
b. Use a small screwdriver to pry and separate the insert from the locking arm, as
shown below.
Figure 5. Prying Off the Locking Arm Insert
SF 26CT LP User Guide • Installation - Single Installer 5
c. Repeat steps a. and b. for the remaining three locking arms.
d. Rotate all four locking arms back into the speaker.
2. Configure the cable/conduit access plate and captive screw connector:
Loosen the three access plate screws and remove the plate before wiring the speaker.
Alternate
Knockout
Remove the
terminal cover
.
Figure 6. Removing the Cable/Conduit Access Plate
3. Configure the access plate:
• If not using conduit: Route the speaker wires through the cable clamp.
• If using conduit: Remove the cable clamp and install the conduit into the plate
opening. Secure the conduit to the plate with the locking nut and pull the speaker
wires from the conduit.
NOTE: The cover plate has an alternate hole available by removing the
knockout.
4. Strip 0.2 inch (5 mm) from the wire ends.
SF 26CT LP User Guide • Installation - Single Installer 6
5. Attach the speaker wires to the captive screw connector depending on the
configuration, using one of the three methods illustrated in figure 7.
Wiring Multiple Speakers in Parallel
When a chain of speakers is wired this way, disconnecting
one speaker does not remove power from the remaining
speakers in the chain.
Number of Wires per
Connection Point
Maximum
Wire Gauge
1 12 AWG
2 16 AWG
4 18 AWG
Wire Gauge Table
Speaker 1
Speaker 2
IN
–
–
LOOP
–
–
IN
+
+
LOOP
+
+
(Black)
(Red)
(Red)
(Red)
(Black)
(Black)
Power Amplifier
Speaker 1
Speaker 2
(Black)
(Red)
(Red)
(Black)
Power Amplifier
(Black)
(Red)
Speaker 1
(Red)
(Black)
Power Amplifier
IN
–
–
LOOP
–
–
IN
+
+
LOOP
+
+
IN
–
–
LOOP
–
–
IN
+
+
LOOP
+
+
IN
–
–
LOOP
–
–
IN
+
+
LOOP
+
+
IN
–
–
LOOP
–
–
IN
+
+
LOOP
+
+
Wiring Multiple Speakers Using Loop-through
When a chain of speakers is wired this way, disconnecting
one speaker removes power from all downstream speakers.
Wiring a Single Speaker
1
2
3
Figure 7. Wiring Options with Wire Gauge Table
ATTENTION:
• Do not tin the wire leads before installing into the connector. Tinned wires
are not as secure in the connector and could be pulled out.
• Ne pas étamer les conducteurs avant de les insérer dans le connecteur.
Les câbles étamés ne sont pas aussi bien fixés dans le connecteur et
pourraient être retirés.
• When connecting multiple speakers in 8-ohm mode, be sure that the
combined rated impedance does not equal a value less than the minimum
rated impedance of the amplifier.
• Lors de la connexion de plusieurs enceintes en mode 8ohm, assurez vous
que le niveau d’impédance combinée ne soit pas équivalent à une valeur
inférieure à l’impédance minimum de l’amplificateur.
SF 26CT LP User Guide • Installation - Single Installer 7
6. Insert the captive screw plug into the four-pole receptacle of the speaker.
• Using a cable clamp on the access plate:
4-pole Captive Screw
Connector
Figure 8. Using a Cable Clamp
• Using a conduit adapter on the access plate:
Flexible Conduit Adapter
Figure 9. Using a Conduit Adapter
7. Replace the access plate and tighten the three retaining screws.
8. Tighten the cable clamp if it was used.
SF 26CT LP User Guide • Installation - Single Installer 8
Mounting the Speaker
The speaker can be Installed into rigid material (mineral tile, gypsum board, sheetrock, etc.)
or soft material, such as fiberglass.
1. Insert the speaker through the bottom of the hole in the ceiling tile that was cut in
step 3 on page 3 (Preparing the Installation Location) with the wires out of
the way.
2. Clamp the speaker to the C-ring by using a Phillips screwdriver to tighten the four
locking arms to the C-ring (see figure 10 and the Note below).
NOTE: The screw hole locations are marked on the
front baffle with a Phillips-head screw symbol. Use
these holes to tighten the locking arms.
Locking arm
screw hole
marking
8
Ω
8Ω
6
4W
32W
OFF
8W
1
6W
64W
32W
16W
OFF
10
0 V
7
0 V
Figure 10. Clamping the Speaker to the C-ring
Tightening the Locking Arms into Rigid Material:
For rigid material use the Opti-Torque
TM
indicator ring as a tightening guide.
ATTENTION:
• To avoid damaging the speaker locking arms, do not overtighten the four
screws.
• Ne pas trop serrer les quatre vis pour éviter d’endommager les bras de
verrouillage de l’enceinte.
SF 26CT LP User Guide • Installation - Single Installer 9
NOTE: Each of the four locking arm screws uses an Opti-Torque
TM
indicator ring.
The indicator releases a red plastic ring onto the screwdriver once the screw is
tightened to the correct torque. Stop tightening when this occurs to avoid
overtightening the locking arms to the C-ring.
8Ω
8Ω
64W
32W
OFF
8W
16W
64W
32W
16W
OFF
100 V
70 V
Figure 11. Stop Tightening When the Red Fing Falls
Tightening the locking arms into soft material:
Because fiberglass ceilings and other soft materials are not as rigid as mineral tiles and
other hard materials, the Opti-Torque indicator ring must not to be used as a tightening
guide due to the risk of overtightening.
ATTENTION:
• To avoid damaging or deforming soft ceiling material, tighten the locking arms
to secure the speaker, but stop tightening short of causing the speaker to
deform the flat mounting surface of the ceiling, as seen from below.
• Afin de ne pas endommager ni d’altérer un plafond souple, serrez les bras de
verrouillage pour sécuriser l’enceinte, en veillant cependant à ce que l’unité ne
cause l’altération de la surface de montage plane du plafond, comme illustré
ci-dessous.
3. If required, attach a secondary support line.
a. Connect a secondary support line to the support loop on the back of the speaker
enclosure, as shown here.
Anchor the end to suitable
secure points within the
solid and permanent
building structure.
Figure 12. Connecting a Secondary Support Line
X
SF 26CT LP User Guide • Installation - Single Installer 10
ATTENTION:
• Do not allow any slack in the secondary support line.
• Ne laissez pas de mou au niveau du filin de sécurité secondaire.
b. Replace the adjacent ceiling tile that was removed in step 4b on page 4.
4. Set the rotary tap selector switch to the appropriate setting using a small screwdriver.
Adjust the Tap Selector
8
Ω
8
Ω
6
4
W
3
2
W
O
F
F
8
W
1
6
W
6
4
W
3
2
W
1
6
W
O
F
F
100
V
7
0 V
8Ω
8Ω
64W
32W
OFF
8W
16W
64W
32W
16W
OFF
100 V
70 V
Figure 13. Setting the Rotary Tap Selector Switch
ATTENTION:
• When setting the taps for a distributed (high impedance) system, do not tap
the system above the rated power of the amplifier.
• Lors de la mise en place des capteurs pour un système distribué (haute
impédance), n’exploitez pas le système au delà du niveau d’alimentation de
l’amplificateur.
• When connecting multiple speakers in 8-ohm mode, be sure that the combined
rated impedance does not equal a value less than the minimum rated
impedance of the amplifier.
• Lors de la connexion de plusieurs enceintes en mode 8ohm, assurez vous que
le niveau d’impédance combinée ne soit pas équivalent à une valeur inférieure
à l’impédance minimum de l’amplificateur.
SF 26CT LP User Guide • Installation - Single Installer 11
5. Install the grille. Position the grille so that it covers the baffle of the speaker. Six small
magnets secure the grille in place.
Speaker Grille
8
Ω
8
Ω
6
4
W
3
2
W
O
F
F
8
W
1
6
W
6
4
W
3
2
W
1
6
W
O
F
F
100
V
7
0 V
Figure 14. Installing the Grille
NOTE: Specific test points can be used to troubleshoot speaker system problems.
Should problems be encountered, please see Troubleshooting: Signal Test Points on
page 25.
SF 26CT LP User Guide • Installation - Single Installer 12
Installation in a Suspended
Ceiling (Division of Labor)
For a division of labor installation, follow the steps in this section. In a division of labor
installation, low-voltage contractors first install the speaker back can enclosure (construction
rough-in phase). After the back can has been installed, the second phase of the installation
can begin by installing the speaker assembly to the back can.
Topics in this section include:
• Getting Started
• Preparing the Installation Location
• Configuring the Speaker
• Mounting the Speaker
Getting Started
1. Using a flat head screwdriver, completely loosen the four screws holding the speaker
assembly to the back can enclosure from the speaker, as shown in figure 15 below.
NOTE: The screws are not removable. They unscrew completely, but do not pull
out.
8Ω
8Ω
64W
32W
OFF
8W
16W
64W
32
W
16W
OFF
100 V
70 V
Figure 15. Unscrewing the Speaker Assembly From the Back Can
NOTE: Notches are provided
to help pry the speaker
assembly from the back can.
SF 26CT LP User Guide • Installation in a Suspended Ceiling - Division of Labor 13
2. Carefully separate the speaker assembly from the back can, as shown in figure 16.
NOTE: Disconnect the speaker wires from the speaker assembly before completely
separating the speaker assembly from the back can.
Figure 16. Separating the Speaker Assembly from the Back Can
3. Repeat steps 1 and 2 for each speaker in the system and distribute the
components to the appropriate installers.
Preparing the Installation Location
Follow the steps in Preparing the Installation Location on page 3.
Configuring the Speaker
Follow the steps in Configuring the Speaker on page 5.
SF 26CT LP User Guide • Installation in a Suspended Ceiling - Division of Labor 14
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dans d''autres langues
- English: Extron SF 26CT LP User manual
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