Owner's Manual

MTC-21
OUB
Instructions
U-Bracket
for
Control
SB-21
0
Subwoofer
Loudspeaker
Read and
follow
these instructions
carefully
before beginning.
Installing
speakers must be performed by experienced professionals.
If
you have any doubts about the
integrity
of
the structure you are mounting to or are not sure about the proper hardware or method to use,
consult
a structural engineer.
Q!y
1 pc.
2 pes
2 pes
2 pes
2 pes
Description
Bracket
Friction Gasket
Bolt,
6mm, 1mm pitch,
20
mm
long,18-8SS
Fender
Flat
Washers for 6mm,
18-8SS
Spring
Lock Washer for 6mm,
18-8SS
Step
1
- Test Fit the Bracket to the
Speaker
Place
the bracket over the speaker cabinet. Gaps between the speaker surface and the bracket arms are to
be
filled
in
with the
included friction gasket. Test the
included
hardware to make sure the
bolts,
washers
and
lock
washers fit correctly. Determine which
slot you
will be using and how the bracket
will
be positioned
in
relation
to the speaker. Determine which threaded
hole
in
the speaker
will
be used (Note: The center
hole
is
closest
to the center
of
gravity, so the speaker
will
stay
in
position best when using the center
hole.)
Make sure you
will have enough
wall clearance
for your intended positioning. Remove the bracket from the
speaker.
Step
2
-
Install
the Bracket
Securely
to Building Structure
Select
the mounting area where the speaker will
be positioned. Be sure there is adequate
structural
material
for mounting, such as a stud.
Do
not
rely
on
drywall, acoustic
tiles,
etc. to support the weight
of
the
speaker.
Follow building
code requirements to
safely install
the bracket to the
building
structure. Tighten
all hardware permanently.
Step 3 -
Install Speaker
into Bracket.
Position
the speaker
in
between the bracket arms and
install
the
included
hardware through the desired
slots
and into the speaker cabinet's threaded
holes.
Be sure to
place
the friction gaskets between the
speaker and the bracket arms then tighten the
bolts loosely,
not tight.
Step
4
-Aim
the
Speaker
Rotate the speaker until
it is aimed in the desired direction, then secure the side
bolts
permanently with a
wrench.
Step
5-
Recommendation:
Safety Cable
It
is
strongly recommended that the speaker
be
secured to the mounting structure with a
properly
rated
safety
cable.
JBL
Professional, 8500 Balboa Blvd,
Northridge, CA 91329 (Rev01-111121)