JBL Car Speaker 28T 60 User Manual

High Output  
Indoor/Outdoor  
®
Background/Foreground Speaker  
Control 28T-60  
Professional Series  
Key Features:  
Isolation transformer for  
70.7V/100V distributed-line  
sound systems  
Components: 8” Polypropylene  
coated woofer, 1” Titanium coated  
horn loaded tweeter  
TM  
Built-in InvisiBall mounting  
hardware*  
Weather resistant enclosure and  
transducers  
Readily paintable  
90° x 90° high frequency horn  
Overload Protection Circuitry  
*Patents pending worldwide  
The Control® 28T is the largest of  
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.  
JBL Professional’s Control Contractor  
Series indoor/outdoor loudspeakers.  
Its rich sonic character makes the  
Control® 28T a perfect choice for  
restaurants, health clubs, under bal-  
cony, outdoor theme & water parks,  
or other applications where fore-  
ground/background music and pag-  
ing are required. The Control 28T can  
be used in either 70.7V or 100V  
distributed-line sound systems. Taps  
are provided at 60W, 30W and 15W  
(plus a 7.5W tap for use on 70.7V  
systems only).  
Available in black (Control 28T-60) and white (Control 28T-60-WH).  
Specifications:  
Frequency Range (-10 dB)1: 55Hz to 15kHz  
2
Power Capacity: Components and Network: 175 Watts Continuous Program  
Transformer: Per each listed tap rating  
(IEC pink noise, 100 hrs)  
Tap Settings: 100V Line: Tap 1 = 15W, Tap 2 = 30W  
Tap 3 = 60W, Tap 4 is not used  
70V Line: 0Tap 1 = 7.5W, Tap 2 =15W  
Tap 3 = 30W, Tap 4 = 60W  
Nominal Max Output by Tap: Tap Number  
70.7V Input  
099 dB  
100V Input  
102 dB  
(dB-SPL @ 1m):  
Tap #1:  
Tap #2:  
Tap #3:  
Tap #4:  
The unique and global patent  
pending InvisiBall™ mounting hard-  
ware 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 hor-  
izontal 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 deter-  
rence as well.  
102 dB  
105 dB  
105 dB  
107 dB  
107 dB  
(do not use)  
Directivity Factor (Q): 7.5  
Directivity Index (DI): 8.8  
Crossover Frequency: 2.8kHz  
LF Driver: 200mm (8 in) Polypropylene cone w/WeatherEdge  
HF Driver: 25mm (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-X4 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): 6.5kg (14.3 lbs)  
The Control® 28T readily accepts a  
variety of paints and finishes to  
match any decor.  
Shipping Weight (pr): 15kg (33 lbs)  
Included Accessories: Invisiball Assembly  
6mm x 180mm hex key  
Optional Accessories:  
Weather resistance is maximized by  
coating the woofer cone in  
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.  
polypropylene and terminating its cir-  
cumference in JBL’s WeatherEdge™, a  
seamless, rubberized extension of the  
woofer surround that provides added  
protection to critical transducer ele-  
ments. The polycarbonate tweeter  
MTC-28/25CM: Ceiling-mount adapter.  
1Half-space (on-wall).  
2Continuous program power is a conservative expression of the system’s ability to handle normal speech and music  
program material and is defined as 3dB above the Continuous Pink Noise Rating (IEC-shaped pink noise with a 6dB  
crest factor, for 100 hours continuously).  
3Half-space (on-wall), ave 100Hz 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.  
 
Horizontal 1/3 Octave Polars  
Architectural Specifications:  
The loudspeaker shall consist of a 200mm (8 in) low frequency trans-  
ducer, 25mm (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 fol-  
lows: Usable frequency response shall extend from 55 Hz to 15 kHz  
(10 dB below rated sensitivity, in half-space, with no external equaliza-  
tion). The loudspeaker shall be equipped with a transformer for use in  
either 70.7V or 100V distributed-line sound systems with taps selectable  
by rotary switch. Taps shall be nominally 7.5W @ 70V (15W @ 100V),  
15W @ 70V (30W @ 100V), 30W @ 70V (60W @ 100V), and 60W @ 70V  
(not used @ 100V). 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 3dB above a test signal  
of filtered random noise conforming to international standard IEC268-5  
(shaped pink noise with a peak-to-average ratio of 6dB), for 100 contin-  
uous hours duration.  
The system shall be protected against damage from occassional over-  
powering via full range series lamps that limits the power to the net-  
work and transducers. The high frequency transducer shall be horn-  
loaded to more evenly cover a nominal 90° horizontal by 90° vertical  
area.  
The enclosure shall be constructed of high-impact polystyrene for pro-  
tection 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 frequen-  
cy transducer shall be constructed of polycarbonate, reinforced with a  
titanium film for additional weather resistance. The system shall with-  
stand 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 ultra-  
violet (method 505.3). The system shall have a IEC 529 splashproof  
rating of IP-X4.  
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 ball-  
type mounting system. The ball mechanism shall be internal to the cabi-  
net to allow low-profile mounting and better stability via a short moment  
arm. The logo shall be rotatable for proper orientation when the loud-  
speaker is mounted horizontally or vertically.  
The external wiring connectors shall be spring loaded and gold plat-  
ed, 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 6.5 kg (14.3 lbs).  
The finish shall be a paintable lighly textured black.  
The system shall be the JBL Model Control 28T-60 with included  
InvisiballTM mounting system.  
 
®
Control 28T-60 High Output, Indoor/Outdoor, Background/Foreground Speaker  
Vertical 1/3 Octave Polars  
JBL Professional  
8500 Balboa Boulevard, P.O. Box 2200  
Northridge, California 91329 U.S.A.  
SSCONTROL 28T-60  
CRP 10M  
7/98  
A Harman International Company  
 

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