JBL PROFESSIONAL CBT-70JE-1 - Low Frequency Extension Module for CBT 70J-1
The JBL Professional CBT-70JE-1 is a low-frequency extension module specifically designed for integration with the JBL CBT 70J-1 line array column speaker. This component is essential for systems requiring deeper bass response and greater control over the coverage pattern. By adding the CBT-70JE-1, the combined system transforms into a taller and more powerful array, doubling power handling capacity and significantly extending low-frequency performance, while also improving sound directivity and range.
Built with a robust, fiberglass-reinforced ABS enclosure and a weather-resistant aluminum grille, the CBT-70JE-1 is ready to withstand the demands of fixed installations both indoors and outdoors. Its design houses four high-performance 5-inch low-frequency drivers, ensuring powerful bass reproduction with minimal distortion, even at high sound pressure levels.
Main features
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Specific Design: Created exclusively to be coupled with the CBT 70J-1 column loudspeaker, forming a unified, high-performance linear array system.
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Four Low Frequency Drivers: Equipped with four 5-inch (125mm) speakers with 38mm voice coils and dual-magnet neodymium motors, designed for high linear excursion and superior power handling.
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Integrated Crossover: Includes a custom-designed passive crossover network for a smooth and coherent transition with the CBT 70J-1 module.
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Robust Construction: The fiberglass-reinforced ABS enclosure and high-strength aluminum grille ensure long-term durability.
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Weather Resistance: It has an IP-55 rating (with the optional MTC-PC2 panel cover), giving it resistance to moisture, UV rays and salt spray, making it ideal for outdoor installations.
Product benefits
Adding the CBT-70JE-1 to a CBT 70J-1 system provides substantial sonic enhancements. The primary benefit is the extension of the low-frequency response down to 45 Hz, adding depth and punch to the sound, essential for high-impact music and effects. Furthermore, doubling the array height to 140 cm significantly improves control of the vertical coverage pattern, directing sound more precisely toward the audience and reducing unwanted reflections off ceilings and floors. This combination, thanks to JBL's Constant Beamwidth Technology™, achieves asymmetrical coverage that projects a narrower beam pattern toward distant areas and a wider one toward nearby areas, resulting in an exceptionally uniform sound pressure level (SPL) throughout the listening area.
Use cases
The CBT 70J-1 combined system with the CBT-70JE-1 extension is the perfect solution for a wide range of applications demanding high sound quality, precise coverage control, and a full frequency response. It is ideal for spaces such as auditoriums, conference rooms, houses of worship, theaters, and performing arts venues. Its ruggedness and weather resistance also make it perfect for sports arenas, stadiums, theme parks, transportation hubs, and any other outdoor or acoustically complex space where speech intelligibility and musical quality are paramount.
Frequently Asked Questions
Can the CBT-70JE-1 be used independently?
No, the CBT-70JE-1 is an expansion module and is designed to work exclusively with the JBL CBT 70J-1 line array column speaker. It will not function as a standalone speaker.
What does the installation package include?
The CBT-70JE-1 includes the necessary coupling plate to securely attach it to the CBT 70J-1, creating a single speaker column.
What improvement does it actually bring to the CBT 70J-1 system?
It provides three key improvements: it significantly extends the bass response (down to 45 Hz), increases the system's total power handling capacity, and improves control of the vertical directivity pattern for more uniform audience coverage.
Project description
Passive low-frequency extension module for the JBL CBT 70J-1 column system. It contains four 125 mm (5-inch) low-frequency transducers with neodymium drivers. The combined system's frequency response extends from 45 Hz to 700 Hz. Power handling capacity is 500W (continuous program, 2 hours) and 350W (continuous, 100 hours). The nominal impedance is 8 ohms. The enclosure is made of fiberglass-reinforced ABS with an aluminum grille and is rated for IP-55 weather resistance. It connects via screw terminals and includes a mounting plate for attaching to the CBT 70J-1.
