Control®28 High Output Indoor/Outdoor Background/Foreground Speaker
Components: 8” Polypropylene
coated woofer, 1” Titanium coated
horn loaded tweeter.
Built-in InvisiBall ® mounting
Weather resistant enclosure and
90° x 90° high frequency horn
Overload Protection Circuitry
Sensitivity: 92 dB SPL, 1W, 1m
*Patents pending worldwide
The Control® 28 is the largest of
JBL Professional’s Control Contractor
Series indoor/outdoor loudspeakers.
Its rich sonic character makes the
Control® 28 a perfect choice for
restaurants, health clubs, under balcony,
outdoor theme & water parks,
or other applications where foreground/
background music and paging
The unique and global patent
pending InvisiBall mounting hardware
is included in each system and
makes short work of permanent
installation. The InvisiBall mounting
method adds the benefit of vertical
rotation of up to 37° off-axis and horizontal
rotation of up to 44° off-axis.
Because InvisiBall adjustments are
made through a hidden access
behind the logo badge, the grill
never needs to be removed and there
exists a high degree of theft deterrence
The Control® 28 readily accepts a
variety of paints and finishes to
match any decor.
Weather resistance is maximized by
coating the woofer cone in
polypropylene and terminating its circumference
in JBL’s WeatherEdge™, a
seamless, rubberized extension of the
woofer surround that provides added
protection to critical transducer elements.
The polycarbonate tweeter
diaphragm is reinforced with a thin
film of titanium for added rigidity and
endurance against sun, salt and moisture.
Zinc plated grilles resist rusting
in the harshest conditions.
Available in black (Control 28) and
white (Control 28-WH).
Control® 28 High Output Indoor/Outdoor Background/Foreground Speaker
Frequency Response in half-space
(2, solid line) and full-space (4,
dotted line), and Input Impedance
Horizontal Off Axis Frequency Response
Vertical Off Axis Frequency Response (up)
Vertical Off Axis Frequency Response (down)
Horizontal 1/3 Octave Polars
The loudspeaker shall consist of a 200 mm (8 in) low frequency transducer,
25 mm (1 in) high frequency transducer, and frequency dividing
network installed in a ported enclosure. The low frequency voice coil
shall be 32 mm (1-1/4 in) in diameter.
Performance specifications of a typical production unit shall be as follows:
Measured sensitivity (SPL at 1 m [3.3 ft] with 2.83V input, averaged
from 500 Hz to 1.5 kHz) shall be at least 92 dB-SPL. Usable frequency
response shall extend from 60 Hz to 16 kHz (10 dB below rated sensitivity,
in half-space, with no external equalization). Nominal impedance
shall be 8 ohms. The frequency dividing network shall have a crossover
frequency of 2.8 kHz. Rated power capacity shall be at least 175 watts
continuous program power, defined as 3 dB above a test signal of filtered
random noise conforming to international standard IEC268-5 (shaped
pink noise with a peak-to-average ratio of 6 dB), for 100 continuous
The system shall be protected against damage from occassional overpowering
via full range series lamps that limits the power to the network
and transducers. The high frequency transducer shall be hornloaded
to more evenly cover a nominal 90° horizontal by 90° vertical
The enclosure shall be constructed of high-impact polystyrene for protection
against the elements in outdoor applications, and for paintability.
The grille shall be completely zinc-coated for resistance against rusting,
shall be bake-painted black, and shall be secured via screws to keep it in place when facing downward.
The low frequency transducer shall have a polypropelene cone and a
butyl rubber surround which shall extend seamlessly over the edge of
the speaker frame for protection against the elements. The high frequency
transducer shall be constructed of polycarbonate, reinforced with a
titanium film for additional weather resistance. The system shall withstand
Mil Spec 810 testing with specified time durations for exposure to
the following environments with no effect on its acoustical performance
or structural integrity: salt spray (method 509.3), temperature -19°C to
49°C (method 501.3 and 502.3), 95% humidity (method 507.3) and ultraviolet
(method 505.3). The system shall have a IEC 529 splashproof rating
For theft deterrence, the installation access area shall be hidden
behind a snap-out cover, and the access area shall be on the front of the
loudspeaker for ease of installation and adjustment. The loudspeaker
shall be rotatable over a minimum of ±35° in all directions via a balltype
mounting system. The ball mechanism shall be internal to the cabinet
to allow low-profile mounting and better stability via a short moment
arm. The logo shall be rotatable for proper orientation when the loudspeaker
is mounted horizontally or vertically.
The external wiring connectors shall be spring loaded and gold plated,
and shall accept bare wire, single or dual banana-type connectors
with 19 mm (3/4 in) spacing. Overall cabinet dimensions shall be no
greater than 380 mm (15.0 in) high by 280 mm (11.0 in) wide by 220
mm (8.6 in) deep and shall weigh no more than 5.5 kg (12 lbs).
The finish shall be a paintable lighly textured black.
The system shall be the JBL Model Control 28 with included Invisiball®