JBL Ctrl28 Service Manual
Control
®
28
High Output
Indoor/Outdoor
Background/Foreground Speaker
Key Features:
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Components: 8” Polypropylene
coated woofer, 1” Titanium coated
horn loaded tweeter.
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Built-in InvisiBall®patented
mounting hardware
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Weather resistant enclosure and
transducers
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Readily paintable
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90° x 90° high frequency horn
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Overload Protection Circuitry
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Sensitivity: 92 dB SPL, 1W, 1m
The Control®28 offers a rich sonic
character making it a perfect choice
for restaurants, health clubs, under
balcony, outdoor theme & water
parks, or other applications where
foreground/background music and
paging are required.
The patented 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° offaxis. 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 as well.
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).
Specifications:
Frequency Range (-10 dB)1: 60 Hz to 16 kHz
Continuous Program:
Power Capacity2: 175 Watts
Sensitivity3: 92 dB SPL, 1W, 1m
Directivity Factor (Q): 7.5
Directivity Index (DI): 8.8
Nominal Impedance: 8 ohms
Crossover Frequency: 2.8 kHz
LF Driver: 200 mm (8 in) Polypropylene cone w/WeatherEdge
HF Driver: 25 mm (1 in) Titanium coated polycarbonate
Enclosure Material: HIPS (High Impact Polystyrene)
Overload Protection: Full-Range power limiting to protect network and transducers
Termination: Spring terminals, accepts banana plug
Environmental: Conforms to Mil Spec 810 for humidity, salt spray,
temperature & UV. IEC 529 IP-34 splashproof rating.
Dimensions (H x W x D): 380 x 280 x 220 mm (15.0 x 11.0 x 8.6 in)
Net Weight (ea): 5.5 kg (12 lb)
Shipping Weight (pr): 11 kg (25 lb)
Included Accessories: Invisiball Assembly
6 mm x 180 mm hex key
Optional Accessories:
MTC-28V: For vertical columnar orientation of up to 3 loudspeakers
MTC-28H: For horizontal splaying of two speakers. Three brackets array
up to six loudspeakers in a 360° array.
MTC-28/25CM: Ceiling-mount adapter.
MTC-23SSG: Stainless Steel Grille for harsh environments. Available in
silver, black (-BK) or white (-WH)
MTC-23WMG: WeatherMax™ Stainless Steel Grille protects against driving
precipitation. Available in black or white (-WH)
MTC-PC2: Input panel cover protects input terminals in outdoor
environments
1
Half-space (on-wall).
2
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 (IEC-shaped pink noise with a 6 dB
crest factor, for 100 hours continuously).
3
Half-space (on-wall), ave 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
䉴 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
Beamwidth
Directivity Index, Q
Horizontal Off Axis Frequency Response
Vertical Off Axis Frequency Response (up)
Vertical Off Axis Frequency Response (down)
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