The JBL MTC-CBT-70T is a specialized accessory designed to add transformer functionality to specific JBL CBT 70 series constant-beamwidth column loudspeakers. This bolt-on module is engineered for installations where the audio system architecture is based on a 70V or 100V constant-voltage distributed line, a standard in commercial audio for powering multiple speakers over long cable runs with a single amplifier. The module houses a high-quality multi-tap transformer that converts the speaker's standard low-impedance input to a constant-voltage compatible input, allowing the sophisticated beam-steering capabilities of the CBT 70 column to be seamlessly integrated into background music, paging, and sound reinforcement systems found in airports, worship spaces, corporate campuses, and other large-scale venues.

Installation is designed to be straightforward and secure. The module bolts directly onto the designated area of the compatible CBT 70 speaker enclosure, utilizing pre-existing mounting points for a clean, integrated appearance. Once installed, it provides a terminal block or connector for the constant-voltage line input, typically with several power tap settings (e.g., 1W, 2W, 5W, 10W, 20W). These taps allow the installer to balance the output level of the column relative to other speakers on the same amplifier channel, ensuring uniform coverage and appropriate loudness for its location. This accessory does not alter the core acoustic performance or beam-shaping DSP of the CBT column; it simply provides the necessary electrical interface for constant-voltage system compatibility.

By offering this as an add-on module, JBL provides system designers with maximum flexibility. They can deploy the CBT 70 in its standard low-impedance mode for critical, high-fidelity applications or easily convert it for integration into a large-scale distributed audio system with the addition of the MTC-CBT-70T. This ensures that the advanced pattern control and clarity of the CBT technology can be utilized in a much broader range of professional installation scenarios, making it a versatile and future-proof solution for complex audio environments.