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: Measured sensitivity (SPL at 1 m [3.3ft] 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 sensitiv- ity, 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 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 continuous 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 rat- ing 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 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

InvisiballTM mounting system.

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JBL Professional Control 28 specifications Architectural Specifications
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Control 28 specifications

The JBL Professional Control 28 is a premium outdoor loudspeaker designed for both commercial and residential applications, delivering exceptional sound quality and durability. This compact speaker is part of JBL's Control series, known for their reliability and versatility in various environments. The Control 28 is particularly suitable for use in restaurants, retail spaces, outdoor venues, and sports facilities.

One of the standout features of the Control 28 is its robust construction. It is designed to withstand harsh weather conditions, making it ideal for outdoor installations. The speaker's enclosure is made from high-impact polypropylene, ensuring durability while providing excellent acoustic performance. Additionally, the Control 28 is UV-resistant, protecting it from sun damage and ensuring longevity even in exposed locations.

In terms of sound quality, the Control 28 boasts a 8-inch low-frequency driver and a 1-inch compression driver, providing a frequency response of 60Hz to 20kHz. This allows the speaker to reproduce clear, full-range audio, making it suitable for various audio applications ranging from background music to more engaging sound systems for events. The speaker also features a wide, even dispersion pattern, ensuring that sound reaches a large area without dead zones.

Another notable technology in the Control 28 is JBL's waveguide technology, which helps to optimize the driver's performance. This ensures that the sound is not only loud but also clear and devoid of distortion. Furthermore, the speaker is equipped with high-performance crossovers that improve frequency response and overall audio balance.

The Control 28 is designed for easy installation, featuring a versatile mounting system that allows for flexible placement in multiple orientations. It comes with a built-in 70V/100V transformer, making it compatible with distributed audio systems. This simplifies large-scale installations, allowing integrators to seamlessly incorporate the speaker into existing setups without significant modifications.

In summary, the JBL Professional Control 28 combines durability, superior sound performance, and ease of installation, making it a favored choice for various applications. Its robust design, advanced technology, and versatility ensure that it delivers high-quality audio in both commercial and outdoor environments, affirming JBL's reputation for delivering professional-grade audio solutions.
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