Extron electronics SM 28 User manual

1
Product Category
SM 28 • Setup Guide
WARNING: Installation and service must be performed by experienced personnel only.
AVERTISSEMENT : L’installation et l’entretien doivent être effectués par le personnel autorisé uniquement.
NOTE: Unless otherwise stated, mounting hardware is not included.
This setup guide contains installation information about the Extron SpeedMount®SM 28 speaker.
Installing the Speaker Mounting Plate
The SM 28 speaker comes with a at 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° angle so that the speaker can
point up, down, left, or right from an elevated position by rotating the adapter.
Install the mounting plate vertically or horizontally as shown below right.
NOTES:
• Observe all applicable building codes and local ordinances when installing the speaker.
• If mounting the SM 28 with the yoke mount, see the SM 28 Yoke Mount Kit Setup Guide.
Mounting to a Wall Stud
1. Locate the wall stud where the mounting plate will be installed.
2. If using the 10° mounting adapter, position the adapter over 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.
If not using the
adapter, position
the mounting plate
against the wall.
The #28 arrow, as
shown on the right,
molded into the
mounting plate
indicates the vertical
midpoint of the SM 28 speaker when it is placed on the mount. While
positioning the mounting plate on the wall, mark the location of two pilot holes
using the holes indicated above.
Mounting
Holes
33-0000-01Rev.Ax1
IN
–
LOOP
–
IN
+
LOOP
+
SM28 Speaker
Stud
Mounting
Holes
0° Mounting Plate
10° Mounting Adapter
Catch Tab
Vertical Mounting Horizontal Mounting

2
SM 28 • Setup Guide (Continued)
NOTE: A speaker wire access hole (see the following figures) must also be cut in the wall. Mark the 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. Install the mounting plate.
NOTE: Since applications can vary considerably, exercise good judgment when selecting the mounting location,
method, and hardware. Mounting hardware is not provided.
• If using the 10° mounting adapter, route the speaker cable through the adapter and 0° mounting plate. Next, attach the
adapter to the 0° mounting plate using the four included screws and washers, and then attach the wire ends to the quick
connect contacts using a small screwdriver. Be sure to observe the correct polarity. Attach the mounting plate to the wall (see
the figure below).
If using only the flat plate, route the speaker cable through the rear of the mounting plate and attach the wire ends to the
quick connect contacts using a small screwdriver. Be sure to observe the correct polarity, as shown below. Attach the
mounting plate to the wall (see the figure above).
10° Mounting
Adapter
0° Mounting Plate (4) 4-40 x 3/16"
Screws
Quick Connect Contacts
Mounting Scr
ews
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
Loop-through Connection Single Speaker Connection
Number of Wires
per Connection Point Maximum Wire Gauge
1 12 AWG
2 16 AWG
4 18 AWG
Wire Gauge Table

3
Product Category
NOTE: If surface mounting, route the wires through
alternate access points as shown at right.
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 gure on the right). If the screw head protrudes too far
above the mounting plate surface, damage to the speaker may occur when
the speaker is attached.
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.
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 prior to mounting the speaker will result in damage to the speaker
lock mechanism (see Using the Security Key to Lock and Unlock the Speaker on the next
page).
NOTE: If a secondary attachment point is being used, see the “Attaching a Secondary Support
Cable” section above 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 gure at right). When properly seated, the speaker connections are automatically made.
Secondary
Attachment
Cable
Anchor this end to a
suitable secure point.
A
ttach cable here
and secur
e.
Catch Tab
0.47"
(12 mm)
0.27"
(7 mm)
Goo
d
Bad
0° Mounting Plate
Alternate Access Point Alternate Access Points
10° Mounting Adapter
33-0000-01Rev. Ax1
IN
–
LOOP
–
IN
+
LOOP
+

4
68-2165-50
Rev. A
03 15
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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.
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 gure at right). There are
three small raised “dimples” (see the gure at right) 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.
Removing the Speaker from the Mounting Plate
To remove the speaker from the mounting plate, unlatch the
locking mechanism.
1. Insert the security key into the keyhole of the speaker grille (see the previous
section) and turn the key to the unlock position.
2. Remove the security key.
3. Apply pressure to the grille with your finger over the “dimpled” keyhole to
unlatch the speaker from the mounting plate while lifting up on the speaker
(see figure at right).
ATTENTION: To avoid damaging or scratching the grille nish, do not
use tools or sharp instruments to depress the unlocking mechanism
hidden behind the center of the grille.
Press to Release
8Ω
70
100
8Ω
Tap Indicator
for 70 volt
Tap Indicator
for 100 volt
Unlocked
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Twist to
Lock/Unlock
Unlocked Locked