Control
®
26C/CT
Professional Series – Background/Foreground Ceiling Speaker
SPECSHEET
Architectural Specifications:
The loudspeaker shall be of in-ceiling design, consisting of a 165 mm
(6.5 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 [3.3 ft] with 4V input, averaged
from 100 Hz to 10 kHz) shall be at least 89 dB-SPL. Usable frequency
response shall extend from 75 Hz to 20 kHz (10 dB below rated
sensitivity in half-space) with no external equalization. Rated power shall
be at least 75 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 26C, not Control 26CT). The high
frequency transducer shall be horn-loaded to more evenly cover a
minimum 110° 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, 1/2 in (13 mm inside diameter) conduit, or flexible conduit
up to 22 mm (7/8 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 252 mm (9.9 in), overall
depth from the bottom of the ceiling shall not exceed 190 mm (7.5 in),
and shall weigh no more than 3.4 kg (7.5 lb).
Control 26C: Nominal impedance shall be 16 ohms.
Control 26CT: 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 60W @ 70V, 30W @ 70V (60W @ 100V), 15W@ 70V (30W
@ 100V), and 7.5W @70V (15W @ 100V).
The loudspeaker shall be the JBL Model Control 26C (Control 26CT).
Mounting Dimensions:
Dimensions in inches (mm)
© 2019 Harman International. www.jblpro.com Issued: 9/2019
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