Control Contractor Series In-Ceiling Speaker: The JBL Control 24CT is
a compact ceiling speaker providing premium performance in background,
foreground, and music, plus paging sound systems. The Control 24CT is perfectly
suited for a wide variety of applications from professional offices and airports
to restaurants and specialty retail stores. High power handling, wide frequency
response and low distortion make the Control 24C ideal for sound systems
requiring a higher fidelity sound from ceiling loudspeakers. The premium
performance capability ensures excellent sound character, providing pleasant,
enveloping sound throughout the listening area.
Note: All JBL Control Contractor loudspeakers (both ceiling speakers and
surface-mount models) are designed with a similar sonic signature, allowing for
mixing and matching of the various models within an application, providing a
similar tonal character throughout the entire listening area.
Two-Way Coaxial Design: Most compact of the JBL in-ceiling speakers,
the Control 24CT contains a coaxially mounted 4" woofer and 0.75"
titanium-coated tweeter, providing high-fidelity sound
over an extremely wide coverage area.
- 4" Polypropylene Woofer: The 4" woofer features a
polypropylene-coated cone and pure butyl rubber surround for long life, even
in high humidity environments. An aluminum voice coil former provides extra
cooling for greater long-term power handling.
- 0.75" Titanium Tweeter: The coaxially mounted 0.75" titanium
coated tweeter provides crisp, clear highs. Diffraction-loading of the
tweeter provides wide, even coverage of the listening area. The extremely
broad 130° coverage pattern allows for fewer speakers to be used, making for
a simpler and less expensive installation.
Computer-Optimized Ported Enclosure: The computer-optimized ported
enclosure delivers warm, smooth bass response. Low frequency output can be
further augmented with the addition of one of JBL's Control Contractor subwoofer
models (sold separately).
70V/100V Compatible: Control 24CT includes a 30W multi-tap transformer
for use in either 70.7V or 100V distributed-line systems. Taps are selected with
a rotary switch conveniently located on the front panel, but protected under the
grille, so that the speaker does not have to be removed to adjust tap settings.
- 70V Taps: 30W, 15W, 7.5W, 3.7W
- 100V Taps: 30W, 15W, 7.5W
Removable Locking Connector: Input connection is conveniently provided
on a removable locking connector (included), providing secure connection via
screw-down terminals and allowing a system to be pre-wired before installing the
speaker for fast snap-on convenience. Separate connector terminals are available
for the input and for the loop-through wires, making it easy to jumper the
speaker signal to additional speakers. The input terminal plate provides strain
relief for either bare wire, plenum cable, or 0.5" conduit. The terminal box is
securely enclosed to meet safety codes. You will need to remove a philips-head
screw to access connector terminals.
- Input Terminals: Terminals 2 (+) and 3 (-) are the input
terminals of the loudspeaker.
- Loop-Thru Terminals: Terminals 1 (+) and 4 (-) are the loop-thru
terminals to output connection to other speakers.
Mounting Options: Installation of the Control 24C is quick and easy.
The loudspeaker is packaged complete with the backcan, grille, support backing
bracket, and tile rails. The entire installation can be accomplished without
requiring access above the ceiling. A template is provided for marking the
cutout. An innovative C-shaped support backing plate can be installed
from below through the cutout to reinforce the top of the ceiling material. Tile
bridge rails are included which can be screwed onto the C-plate to extend
support to the T-channel grid in suspended ceiling installations. After the
speaker is fitted through the cutout, it is held securely in place via three
mounting tabs which tighten onto the C-plate, if used, or directly onto the
- Frame Diameter: 7.75"
- Cutout Diameter: 6.625"
- Mounting Depth: 7.5"
Note: The Control 24CT backcan is made of formed steel and the speaker is
suitable for use in air handling spaces, per U.L.-2043. An attachment loop is
provided on the backcan for cabling to the building structure as a secondary
support in seismic areas or where required by code.
Paintable: The speaker trim and grille are paintable to match any
decor. A paint shield is provided for covering the drivers while painting the
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