JBL Ceiling Loudspeakers - Manual (Page 5)

4
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
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 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.
Figure 1:
Optional New -Construction Bracket