Data Sheet

SS Control 24C
CRP
03/10
䉴 Control
®
24C/CT Background/Foreground Ceiling Speakers
Architectural Specifications:
The loudspeaker shall be of in-ceiling design, consisting of a 100 mm (4 in) low frequency transducer, a coaxially-mounted 19 mm (¾ in) high frequency transducer, and
frequency dividing network installed in a ported enclosure. The low frequency voice coil shall be 25 mm (1 in) in diameter and the coil former shall be of aluminum for
maximum heat dissipation.
Performance specifications of a typical production unit shall be as follows: Measured sensitivity (SPL at 1m [3.3ft] with 4V input, averaged from 100 Hz to 10 kHz) shall be
at least 86 dB-SPL. Usable frequency response shall extend from 80 Hz to 20 kHz (10 dB below rated sensitivity in half-space) with no external equalization. Rated power
shall be at least 40 watts continuous pink noise power, defined as conforming to international standard IEC268-5 (shaped pink noise with peak-to-average ratio of 6 dB) for a
period of 100 continuous hours.
The system shall be protected against damage from occasional overpowering via full range series lamps that limit the power to the network and transducers (Control 24C,
not Control 24CT). The high frequency transducer shall be horn-loaded to more evenly cover a minimum 130° polar conical coverage area.
The backcan shall be constructed of formed steel and the baffle of UL94V-0 fire rated medium impact polystyrene. An enclosed terminal box shall be included proving
strain relief for use with either plenum-rated wire, ½ in (13 mm inside diameter) conduit, or flexible conduit up to 22 mm (⅞ in) outside diameter. The external wiring shall
be accomplished via a removable lockable wiring connector with screw-down terminals to provide both secure wire termination and prewiring capability before loudspeaker
installation. An attachment loop shall be provided on the back panel for cabling to building structure as a secondary support point.
The system shall include a support backing plate to reinforce the ceiling material and tile support rails for use on either 2 x 4 ft or 600 x 1200 mm suspended ceiling tiles
and which can all be installed from beneath the ceiling tile.
Overall front face diameter shall not exceed 195 mm (7.7 in), overall depth from
the bottom of the ceiling shall not exceed 183 mm (7.2 in), and shall weigh no
more than 2.7 kg (6 lb).
Control 24C: Nominal impedance shall be 16 ohms.
Control 24CT: The loudspeaker shall be equipped with transformer for use in
either 70.7 or 100V distributed-line speaker systems, with taps selectable by rotary
switch located on the front panel so that the speaker does not have to be removed
to adjust tap settings. Taps shall be nominally 30W @ 70V, 15W@ 70V (30W @
100V), 7.5W @70V (15W @ 100V), and 3.7W @ 70V (7.5W @ 100V).
The loudspeaker shall be the JBL Model Control 24C (Control 24CT).
195
(7.7)
163
(6.4)
183
(7.2)
200
(7.9)
163
(6.4)
Dimensions in mm (in)
JBL Professional
8500 Balboa Boulevard, P.O. Box 2200
Northridge, California 91329 U.S.A.
© Copyright 2010 JBL Professional
www.jblpro.com
A Harman International Company
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