The JBL CBT 1000E is a high-output column extension speaker designed to significantly enhance the low-frequency performance and overall output capability of CBT (Constant Beamwidth Technology) column array systems. It functions as a dedicated powered subwoofer module, engineered to seamlessly integrate with compatible CBT passive column arrays to create a full-range, high-power sound reinforcement solution. This extension speaker is specifically tailored for fixed installations in demanding venues where extended bass response and increased acoustic headroom are required, such as in large houses of worship, performing arts centers, auditoriums, and transportation hubs. Its purpose is to offload the low-frequency demands from the main column arrays, allowing them to operate with greater efficiency and clarity in the mid and high frequencies.

At the core of the CBT 1000E is a powerful, integrated Class D amplifier driving a high-excursion 12-inch woofer within a precision-tuned bass-reflex enclosure. This dedicated amplification ensures optimal control and power delivery specifically for low-frequency reproduction, resulting in deep, articulate, and impactful bass that complements the beamwidth-controlled coverage of the main columns. The system incorporates sophisticated DSP (Digital Signal Processing) that provides preset tuning optimized for integration with specific CBT columns, as well as user-adjustable parameters for equalization, crossover settings, and system alignment. This level of control ensures a seamless acoustic blend between the subwoofer and the column arrays, preserving the system's coherent wavefront and consistent directivity.

The enclosure is constructed from rugged, furniture-grade plywood with a durable textured finish, built to withstand the rigors of permanent installation. Its design allows for flexible deployment; it can be flown directly behind a CBT column array, stacked on the floor, or mounted on a wall. Connectivity is comprehensive, featuring both analog and digital audio inputs, along with data ports for system control and linking multiple units. By combining high-output powered bass extension with intelligent processing and robust construction, the JBL CBT 1000E provides system designers with a powerful, integrated tool to scale the performance of CBT technology for larger spaces and more demanding applications, ensuring full-range coverage with exceptional clarity and impact.