JBL Professional Control 47C/T - Manual (Page 5)

The installation of the Control Contractor 40 Series in-
ceiling loudspeakers can be accomplished, if necessary,
without requiring access above the ceiling. Bracketry for
use with either suspended ceilings or sheetrock ceilings is
included (see below for additional details on the Control
42C). The loudspeaker is held securely in place via
mounting ears which lock into place. Inputs are attached
to a removable locking connector (included) which can be
prewired before installing the loudspeaker for ultra-fast
snap-on installation.
The lightweight Control 42C (0.7 kg / 1.6 lbs) includes a
C-
ring but does NOT include tile rails. In the event that
tile rails are required, they are available as an optional
accessory (MTC-Rail).
OPTIONAL PRE-INSTALLATION BRACKETS
IN MOST CASES, NO BRACKETS OTHER THAN
THE ONES INCLUDED WITH YOUR SPEAKER ARE
REQUIRED. Everything needed for most installations
of these loudspeakers is provided with your Control
Contractor 40 Series in-ceiling loudspeakers.
Installation into sheet rock (typically gypsum board) can
be facilitated by the use of JBL’s optional preinstallation
brackets before the sheetrock is installed. The
preinstallation bracket provides a bracket to which wiring
can be tied behind the sheetrock and it can function as
a cutout template when many cutouts are to be made
in a production-line style installation. Two types of pre-
installation brackets are available from JBL Professional
as optional accessories:
1) The optional NEW-CONSTRUCTION BRACKETS
(available options and listed below) are made of flat sheet
metal, with wings to attach to the building structure. Holes
are drilled for nails or screws at 16 inches (406 mm) and
24 inches (610 mm) on-center. Additional holes can be
drilled by the installer at other spacings up to a maximum
of 24-3/4 inches (630 mm) apart. Sheet rock installs over
the bracket, and the bracket provides a template for blind
cutout of the hole in the sheet rock. The sheet rock is
typically cut with a router-type cutting tool, using the
bracket ring as a cutout guide.
Available New Construction Brackets
MTC-42NC for the Control 42C
MTC-47NC for the Control 47C/T & Control 47LP
MTC-19NC for the Control 47HC & Control 40 CS/T
2) The optional MUD-RING BRACKET (available options
and listed below) contains a circular offset, forming an
edge guide for sheet rock plastering. The bracket has
wings that attach to the building structure. Sheet rock is
typically precut, then the sheet rock hole can be plastered
(or “mudded”) up to the ring to create a seamless cutout.
Available Mud-Ring Brackets
MTC-42MR for the Control 42C
MTC-47MR for the Control 47C/T & Control 47LP
MTC-19MR for the Control 47HC & Control 40 CS/T
USING INCLUDED C-BRACKET WITH SHEETROCK
For many installations, the INCLUDED C-shaped backing
plate provides adequate reinforcement to the ceiling
material, spreading out the clamping force from the tab
clamps.
CUTOUT SIZES
Packaged with the speakers are cardboard cutout templates
for scribing the cutout hole onto your ceiling surface. The
cutout size diameters for the Control Contractor 40 Series
are listed on the following page.
CONTROL 40 SERIES PREPARATION
Optional New-Construction
Bracket
Optional Mud
Ring Bracket
3 JBL Professional Control Contractor 40 Series