JBL 24CT User Manual
Control®24CT MicroPlus
Background
Music
Ceiling Speaker
Key Features:
Extremely wide 150° coverage.
Smooth frequency response.
Advanced crossover network provides
very even coverage throughout listening area.
Components:
• 115 mm (4.5 in) woofer, injection
molded graphite cone with butyl
rubber surround.
• 12 mm (.5 in) polycarbonate tweeter
for extended response.
Control 24CT MicroPlus includes 25W
multi-tap transformer for 70V/100V
systems.
Shallow 100 mm (4 in) depth.
Packaged with grille, backcan and tile
rails for fast installation and easy dealer
stocking.
Applications
The Control 24CT MicroPlus is a
compact in-ceiling speaker, providing
full, high quality sound for background
music and music-plus-paging systems.
These speakers are ideally suited for a
wide variety of applications, from
restaurants and specialty retail stores to
professional offices and airports. Low
distortion, a smooth, natural frequency
response, and a 25W transformer make
the Control 24CT MicroPlus ideal for
medium volume business music. Low
frequency output can be augmented
with the addition of one of the Control
Contractor subwoofer models. Similar
mid/high frequency voicing to other
JBL Control Contractor loudspeakers
allows mixing and matching of models
within zones without requiring separate
equalization.
Installation of the Control 24CT
MicroPlus is quick and easy. The loudspeaker is packaged with the backcan,
grille, support backing bracket and tile
rails. In addition, optional new
construction brackets are available.
The entire installation can be
accomplished without requiring access
above the ceiling.
The Control 24CT MicroPlus backcan
is made of formed steel and the speaker is suitable for use in air handling
spaces per UL2043. An attachment
loop is provided on the backcan for
cabling. A seismic tab is provided as a
secondary support.
The Control 24CT MicroPlus trim and
baffle are paintable to match any decor.
Specifications:
System:
Frequency Range (-10 dB)1: 80 Hz - 25 kHz
Nominal Sensitivity2: 85 dB SPL @ 1 m (3.3 ft)
Crossover:
3.5 kHz, 3rd order low-pass plus 3rd order high-pass with conjugate
Rated Maximum SPL: 99 dB @ 1 m (3.3 ft), 25W tap
Transformer Taps: 70V: 25W, 12W, 6W taps
100V: 25W, 12W taps
Transducers:
Low Frequency: 115 mm (4.5 in) IMG (injection molded graphite), 24 mm (1 in)
voice coil
High-Frequency: 12 mm (0.5 in) polycarbonate
Physical:
Backcan: Formed steel
Baffle/Rim: Medium impact polystyrene, fire rated UL94V-O
Secondary Attachment Point: Included
Termination: Screw-down terminals, touch-proof, UL, CE and VDE rated,
outside of backcan with conduit cover
Safety Agency Rating: Suitable for use in air handling spaces, per UL2043, UL1480,
NFPA90, NFPA70A
Outside Dimensions (H x Dia): 133 x 195 mm (5.3 x 7.7 in)
105 mm (4.1 in) front of ceiling tile to back of the backcan
Cutout Size: 167 mm (6.6 in)
Net Weight (ea): 2.5 kg (5.5 lb)
Shipping Weight (pr): 7.6 kg (17 lb)
Included Accessories: C-shaped support backing plate
2 tile support rails (fits both 2 ft and 600 mm tiles)
Cutout template, cardboard
Optional Accessories: MTC-24TR trim ring for retrofit installations
MTC-24NC optional new construction bracket, flat
MTC-24MR optional mud ring construction bracket
1
Half-space (flush mounted in ceiling)
2
Half-space (in ceiling), averaged 100 Hz to 10 kHz.
JBL continually engages in research related to product improvement. Changes introduced into existing products without notice are an expression of that philosophy.
Professional Series
Control 24CT MicroPlus Background Music Ceiling Speaker
Frequency Response, on axis in half-space, 70V input
to 25W tap
)
Beamwidth vs. Frequency
Horizontal Off Axis Frequency Response
Vertical Off Axis Frequency Response (up)
Vertical Off Axis Frequency Response (down)
110
100
90
80
SPL, 1m (dB)
70
60
20
360
100
-6 dB Beamwidth (degrees)
10
20 100 1000 10000 20000
100 1000 10000
Horizontal
Vertical
Frequency (Hz)
Frequency (Hz
20000
5.3 (133) 4.1 (105)
6.4 (163)
7.7 (195)
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