The CBT 100LA, with Constant Beamwidth Technology, represents a breakthrough in pattern control consistency, utilizing complex analog delay beam-forming and amplitude tapering to accomplish superior, consistent vertical coverage without the narrow vertical beaming and out-of-coverage lobing that are typical of straight form-factor column speakers.
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- Patent-pending Constant Beamwidth Technology provides constant directivity up to the highest frequencies and reduces out-of-coverage lobing.
- Vertical pattern coverage switchable between 40° for medium-throw coverage and 15° for long-throw applications.
- Switchable voicing provides flat response in music mode or mid-range presence peak in speech mode.
- Dynamic SonicGuard overload protection
- Wall bracket included.
- Built-in 70V/100V transformer, plus 8 &ohm direct capability.
"With the CBT Series, JBL is improving upon a number of challenges customers have typically faced with traditional passive columns, which causes the listening area to be covered inconsistently and every listener hearing a different sound character, including inconsistent coverage angles at every frequency, frequency response that changes considerably with distance, and out-of-coverage lobes that contribute to a destructive reverberant field," said Rick Kamlet, Senior Director, Commercial Installed Sound, JBL Professional. "All these factors result in the listening area being covered inconsistently and every listener hearing a different sound character. After years of research by JBL engineers, the CBT Series, with Constant Beamwidth Technology, represents a new benchmark in performance and versatility for passive column loudspeakers, providing not only constant directivity, but also adjustable coverage control, full-fidelity sound quality, and one model that provides a very versatile asymmetrical pattern for more consistent front-to-back sound levels within the room while reducing reflections from the back wall. These features, along with high output levels, make the CBT Series a great choice not just for traditional column applications, but also for projects where larger point-andshoot speakers would normally be utilized."
The coverage pattern of the CBT models can be adjusted-with a simple switch-between Broad Mode (designed for mid-throw situations) and Narrow Mode (for long-throw applications). This versatility allows the CBT's to meet the requirements of a broad range of applications. In addition, the CBT speakers provide Dynamic SonicGuard overload protection circuitry, which reduces distortion at high drive levels, along with user variable voicing which allows selecting a flat frequency response or a midrange presence peak for especially clear speech intelligibility.
The CBT 50LA is a very compact 50 cm high column that utilizes a straight line of eight 2-inch drivers, while the taller CBT 100 LA is a straight 100 cm high column utilizing 16 2" drivers and handles 325 Watts continuous pink noise for high output levels. Combined with Constant Beamwidth Technology circuitry, both provide constant directivity coverage. Both also contain low-saturation transformers, so they can be used on 70V/100V distributed speaker lines or as low impedance speakers.