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Control 321C/CT & 322C/CT
Installation Instructions
Loudspeaker
1
™
EZ-Rail
Line up EZ-Rail™ with one of the
the backbox flanges containing a sin-
gle mounting hole. For orientation
when holding the speaker overhead,
two embossed arrows on the under-
side of the metal baffle indicate the
edge with the EZ-Rail.
Pre-Mounted
Metal Baffle
2
Slide EZ-Rail onto the flange of the
JBL MTC-300BB12 (or compatible
other brand) backbox.
– Over –
MTC-300BB12 Backbox
Shown as Cut-Away for Clarity
3
EZ-Rail helps to hold one side of
the speaker baffle TEMPORAR-
ILY during installation while the
installer installs the screws that hold
the baffle.
IMPORTANT
The installer MUST secure the
baffle in place with screws on all
sides.
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Summary of Contents for JBL Control 321C
-
Page 1: Installation Instructions
Control 321C/CT & 322C/CT Installation Instructions MTC-300BB12 Backbox Shown as Cut-Away for Clarity Loudspeaker Pre-Mounted Metal Baffle ™ EZ-Rail EZ-Rail helps to hold one side of Slide EZ-Rail onto the flange of the Line up EZ-Rail™ with one of the... - Page 2 Attaching the loudspeaker/baffle securely in place with screws: Using JBL’s MTC-300BB12 Backbox – MTC-300BB12 is compatible with two common mounting systems for in- stalling the loudspeaker/baffle to the backbox. Either of these mounting systems may be utilized. Screws are included with the MTC-300BB12 backbox.