BCK SF 26CT LP • Setup Guide
This setup guide contains installation information about the BCK SF 26CT LP back-can. When installed and assembled together
with the DAK SF 26CT LP, they become a fully fuctional SF 26CT LP Soundeld
®
XD low-prole 2-way speaker.
The complete assembly can be installed by a single-trade installation procedure or by a multi-trade installation procedure (see the
SF 26CT LP User Guide, available at www.extron.com, for details). The entire assembly is plenum-rated.
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.
NOTE: Installation of conduit and conduit adapters must conform to all applicable building codes and local ordinances.
Installing the BCK SF 26CT LP in a Suspended Ceiling
Preparing the Installation Location
For hard ceiling installations, see the SF 26CT LP User Guide.
1. Power Down all attached devices.
2. Using the provided cutout template for the outline, cut
a hole for the BCK SF 26CT LP in the ceiling tile, as
described below.
NOTE: For hard ceiling installations, skip steps a
through e, and use the template to cut a hole in
the ceiling.
a. Remove the ceiling tile,
b. Draw diagonal lines across it from opposite corners
to locate its center.
c. Mark the intersection where the lines cross.
d. Position the center hole of the cutout template
directly over the center of the tile, marked in step2a.
e. Trace a circle on the ceiling tile around the cutout
template.
f. Cut out the circle traced in the ceiling tile.
g. Replace the ceiling tile in the ceiling.
3. Attach two V-rails and one C-ring above the hole cut
in step 2, as described below.
NOTE: For hard ceiling installations:
• Fold one C-ring assembly in half and insert it
through the hole in the ceiling.
• Unfold the C-ring and center it over the hole
with the flat side down.
• V-rails are not needed.
a. Assemble two V-rail half-sections so that they
become one single piece by fitting the tab of one
end into the slot of the other end. Open the V-rail
until it locks together (see figure 1). Repeat this
procedure for the other V-rail.
1
Figure 1. 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, as
shown in figure 2.
d. Position the C-ring assembly on the two V-rails so
that the C-ring is centered over the hole.
e. Secure the C-ring to the V-rails using two screws
(see figure 2).
C-ring
V
-rail
Figure 2. Secure the C-ring to the V-rails
BCK SF 26CT LP • Setup Guide (Continued)
b. Configure the cable/conduit access plate.
• When not using conduit: Route the speaker
wires through the cable clamp.
• When using conduit: Remove the cable clamp
and install the conduit into the access plate
opening. Secure the conduit to the plate with
the locking nut and pull the speaker wires from
the conduit.
c. Strip 0.2 inches (5 mm) from the wire ends.
Alternate
Knockout
Remove the
terminal cover.
Figure 5. Removing the Cable/Conduit Access
Plate
d. Use one of the following three methods to attach
the speaker wires to the captive screw connector
(depending on the configuration).
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
Wir
e 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 downstr
eam speakers.
Wiring a Single Speaker
1
2
3
2
4. Route the speaker wires through the ceiling tile hole.
5. 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
that accommodate ceiling tiles of up to 1.5 inches
(3.81 cm) in thickness. For ceiling tiles thicker than
1.5 inches, the locking arm inserts must be removed.
To remove the insert:
a. Using a screwdriver, rotate the locking arm so that
the insert can be accessed (see figure 3).
Figure 3. Accessing the Locking Arm Insert
b. Use a small screwdriver to pry and separate the
insert from the locking arm (see figure 4).
Figure 4. Prying off the Locking Arm Insert
c. Repeat this process for the remaining three locking
arms.
d. Rotate all four locking arms back into the speaker.
6. Configure the cable/conduit access plate and
captive screw connector (see figure 5):
a. The cable/conduit access plate has one alternate
hole available covered by a knockout. Loosen
the three cable/conduit access plate screws and
remove the cover.
Number of
Wires per
Connection
Point
Maximum
Wire
Gauge
1 12 AWG
2 16 AWG
4 18 AWG
3
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.
e. Insert the captive screw plug into the four-pole
receptacle of the speaker.
Using a cable clamp:
4-pole
Captive Screw
Connector
Figure 6. Secure Cabling via Cable Clamp
f. Using a conduit adapter:
Flexible Conduit Adapter
Figure 7. Secure Cabling via Conduit Adaptor
g. Replace the cable/conduit access plate and tighten
the three screws.
h. Tighten the cable clamp if it was used.
7. Mount the speaker back can enclosure
NOTE: For hard ceiling installations, attach the
secondary support line (step 8, on the next page)
prior to mounting the speaker back can enclosure
in the hard ceiling.
a. Insert the speaker up through the hole in the ceiling
tile that was cut in step 2 with the wires out of the
way (see figure 8).
Figure 8. Insert the Back Can into the Ceiling
b. Clamp the speaker to the C-ring by using a Phillips
screwdriver to tighten the four locking arms to the
C-ring (see figure 9).
Figure 9. Tighten the Locking Arms to the C-ring
If tightening the locking arms into rigid material, use
the Opti-Torque
TM
indicators as a tightening guide.
BCK SF 26CT LP • Setup Guide (Continued)
© 2020 Extron Electronics All rights reserved. All trademarks mentioned are the property of their respective owners. www.extron.com
68-3443-51 Rev. A
08 20
8. If required, attach a secondary support line.
a. Connect a secondary support line to the support
loop on the back of the speaker enclosure (see figure
10).
Anchor the end to suitable
secure points within the
solid and permanent
building structure.
Figure 10. Attach Secondary support Line
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 tile that was removed in
step 3.
9. Repeat all steps for all the speakers.
NOTE: Each of the four locking arm screws uses
an Opti-Torque indicator. The indicator releases
a red plastic ring onto the screwdriver once the
screw is tightened to the correct torque.
Stop tightening any further when this occurs
to avoid overtightening the locking arms to the
C-ring.
ATTENTION:
• To avoid damaging the speaker, do not
overtighten the four locking arm screws.
• Pour éviter d’endommager l’enceinte, ne
serrez pas trop les quatre vis.
When tightening the locking arms into soft material:
Because berglass ceilings and other soft materials
are not as rigid as mineral tiles and other hard
materials, the Opti-Torque indicator should 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 short of causing the speaker
to deform the flat mounting surface of the
ceiling, as seen from below.
• An 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.
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