Installation Preparations - JBL CONTROL 24C Owner's Manual

Installation Preparations
The entire installation can be accomplished, if necessary, without requiring access above the
ceiling. Bracketry for use with either suspended ceilings or sheetrock ceilings is included.
The speaker 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 speaker for ultra-fast snap-on installation.
OPTIONAL PRE-INSTALLATION BRACKETS
4
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 ceiling speaker.
However, a particular procedure that is sometimes used for 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 BRACKET is made of flat sheetmetal, 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 of24-3/4 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.
Figure 1:
Optional New -Construction Bracket