JBL_Ctrl28说明书
Control ?
28
High Output Indoor/Outdoor
Background/Foreground Speaker
Key Features:
Components: 8” Polypropylene coated woofer, 1” Titanium coated horn loaded tweeter.
Built-in InvisiBall mounting hardware*瑜伽入门基本动作
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Weather resistant enclosure and transducers
Readily paintable
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 bal-cony, outdoor theme & water parks,or other applications where fore-ground/background music and pag-ing are required.
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 bene?t of vertical rotation of up to 37°off-axis and hor-izontal rotation of up to 44°off-axis.Becau 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.
The Control ?28 readily accepts a variety of paints and ?nishes to match any decor.
Weather resistance is maximized by coating the woofer cone in
polypropylene and terminating its cir-cumference in JBL’s WeatherEdge ?, a amless, rubberized extension of the woofer surround that provides added protection to critical transducer ele-ments. The polycarbonate tweeter diaphragm is reinforced with a thin ?lm of titanium for added rigidity and endurance against sun, salt and mois-ture. Zinc plated grilles resist rusting.Available in black (Control 28) and white (Control 28-WH).
Speci?cations:
Frequency Range (-10 dB)1:
60 Hz to 16 kHz
Continuous Program Power Capacity 2:
175 Watts
Sensitivity 3:
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92 dB SPL, 1W, 1m Directivity Factor (Q):7.5Directivity Index (DI):8.8Nominal 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-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): 5.5 kg (12 lbs)Shipping Weight (pr):11 kg (25 lbs)
Included Accessories:
Invisiball Asmbly
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-28SSG:Stainless Steel Grille for harsh environments. Available in
silver, black (-BK) or white (-WH)
MTC-28WMG: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
1Half-space (on-wall).
2
Continuous program power is a conrvative expression of the system’s ability to handle normal speech and music program material and is de?ned as 3 dB above the Continuous Pink Noi Rating (IEC-shaped pink noi 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 rearch related to product improvement. Changes introduced into existing products without notice are an expression of that philosophy.
Professional Series
Control28 High Output Indoor/Outdoor Background/Foreground Speaker
Horizontal 1/3 Octave Polars
Architectural Speci?cations:
The loudspeaker shall consist of a 200 mm (8 in) low frequency trans-ducer, 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 speci?cations of a typical production unit shall be as fol-lows: Measured nsitivity (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 respon shall extend from 60 Hz to 16 kHz (10 dB below rated nsitiv-ity, in half-space, with no external equalization). Nominal impedance
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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, de?ned as 3 dB above a test signal of ?ltered random noi conforming to international standard IEC268-5 (shaped pink noi with a peak-to-average ratio of 6 dB), for 100 continuous hours duration.
The system shall be protected against damage from occassional over-powering via full range ries 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.
以字的笔顺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 cured via screws to keep it in place whe
n facing downward.
缺乏的近义词The low frequency transducer shall have a polypropelene cone and a butyl rubber surround which shall extend amlessly 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 ?lm for additional weather resistance. The system shall with-stand Mil Spec 810 testing with speci?ed 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 rat-
ing of IP-X4.
内部控制案例For theft deterrence, the installation access area shall be hidden
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behind a snap-out cover, and the access area shall be on the front of the loudspeaker for ea 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-pro?le 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 5.5 kg (12 lbs).
The ?nish shall be a paintable lighly textured black.
The system shall be the JBL Model Control 28 with included Invisiball?
mounting system.
JBL Professional
8500 Balboa Boulevard, P.O. Box 2200Northridge, California 91329 U.S.A.
A Harman International Company
SS Control 28CRP 20M 04/08
Control
28 High Output Indoor/Outdoor Background/Foreground Speaker Vertical 1/3 Octave Polars
