Data Sheet

Control
®
24C/CT
Background/
Foreground
Ceiling Speakers
Key Features:
䉴 Coaxially mounted 100 mm (4 in) woofer
with butyl rubber surround and 19 mm
(¾ in) titanium coated diffraction-loaded
tweeter
䉴 High power, wide frequency response and
low distortion for high sound level
capability
䉴 Wide coverage allows fewer speakers,
reducing the cost of the installed sound
system without sacrificing performance
䉴 JBL’s exclusive SonicGuard
TM
overload
protection allows higher operational levels
and improved system reliability (24C only)
䉴 Packaged with grille, backcan and tile rails
for fast installation and easy dealer stocking
The Control 24C is a compact ceiling
speaker providing premium performance in
background, foreground and music-plus-
paging sound systems. The Control 24C 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.
The Control 24C’s 16 ohm impedance
allows use of multiple speakers in parallel
without having to use a more expensive
constant voltage distributed system. The
optional Control 24CT version includes a
multitap transformer for 70V/100V systems.
JBL’s exclusive SonicGuard overload
protection is a non-invasive loudspeaker
protection system that is inaudible to the
listener, ensuring reliability while providing
full fidelity sound. The computer-optimized
ported enclosure delivers warm, smooth bass
response. Low frequency output can be
further augmented with the addition of one
of the Control Contractor subwoofer models.
The 100 mm (4 in) 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.
The coaxially mounted 19 mm (¾ in)
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.
Specifications:
System:
Freq. Range (-10 dB)
1
: 80 Hz - 20 kHz
Power Capacity
2
: 80 Watts Continuous Program Power
40 Watts Continuous Pink Noise
Nominal Sensitivity
3
: 86 dB SPL @ 1 m (3.3 ft)
Nominal Coverage Angle
4
: 130° conical coverage
Directivity Factor (Q): 2.4 averaged 500 Hz to 4 kHz
Directivity Index (DI): 3.8 averaged 500 Hz to 4 kHz
Rated Maximum SPL: 102 dB @ 1 m (3.3 ft)
Nominal Impedance (24C): 16 ohms (Min Z 16.1 Ω @ 320 Hz)
Transformer Taps (24CT): 070V: 30W, 15W, 7.5W & 3.7W taps
100V: 30W, 15W, & 7.5W taps
Transducers:
Low-Frequency: 100 mm (4.0 in) Polypropylene-coated,
1" coil on aluminum former
High-Frequency: 19 mm (0.75 in) Titanium coated polyester
Physical:
Enclosur
e: Backcan: Formed steel
Baffle/Rim: Medium impact polystyrene, fire rated
UL94V-0
Overload Protection: Full-range power limiting to protect network and
transducers. (On Control 24C, not on Control 24CT)
Termination: Removable locking connector with screw-down
terminals. 2 input terminals and 2 loop-thru output
terminals. Max. wire size 12 AWG (2.5 mm
2
)
Safety Agency Rating: Suitable for use in air handling spaces per UL1480,
UL2043, NFPA90 & NFPA 70. S7232/UL Listed, Signaling
Speaker. Transformer UL registered per UL1876. In
accordance with IEC60849/EN60849.
Outside Dimensions (H x Dia): 200 x 195 mm (7.9 x 7.7 in)
184 mm (7.2 in) front of ceiling tile to back of
backcan
Cutout Size: 168 mm (6.6 in)
Net Weight (ea): 2.7 kg (6 lb) 1 CT: 3.5 kg (8 lb)
Shipping Weight (pair): 6.4 kg (15 lb) CT: 8.0 kg (18 lb)
Included Accessories: C-shaped support backing plate
2 tile support rails (fits both 2 x 4 ft or
600 x 1200 mm tiles)
Cutout template
Paint shield
Removable locking wiring connector
1
Half-space (flush mounted in ceiling)
2
Continuous Pink Noise rating is IEC-shaped pink noise with a 6 dB crest factor for 100 hours continuously.
Continuous Program power is a conservative expression of the system’s ability to handle normal speech and music
program material and is defined as 3 dB above the Continuous Pink Noise Rating.
3
Half-space (in ceiling), average 100 Hz to 10 kHz
4
500 Hz to 4 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
77744_JBL.Ctrl24C_CT.qxd 3/1/10 10:52 AM Page 1