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JBL

JBL MTC-CBT-70T Bolt On Transformer Module for CBT 70 Models

$185.00

The JBL MTC-CBT-70T is a bolt-on transformer module designed to adapt the JBL CBT 70J-1 line-array speaker and the optional CBT 70JE-1 low-frequency extension module for use in 70V and 100V distributed audio systems. This allows for extended cable runs and powering multiple speakers from a single amplifier channel.

View Product Features

• Distributed Audio System Integration: Allows CBT 70J-1 and CBT 70JE-1 speakers to be used in 70V and 100V distributed audio systems.
• Power Taps: Offers power taps at 120W, 60W, and 30W for both 70V and 100V lines, with an additional 15W tap for 70V systems only.
• Secure Connection: Features a barrier strip terminal for secure bare-wire connections.
• Watertight Seals: Includes two gland nuts for a watertight seal using round-jacketed speaker cable between 4.0 mm and 9.0 mm in diameter.
• Bolts Onto Speaker Cabinet: Attaches directly to the back of the CBT 70J-1 or CBT 70JE-1 speaker cabinet using included hardware.
• Environmental Protection: Built with a fiberglass-filled ABS enclosure, it is IP-55 rated for outdoor use.
• Minimal Insertion Loss: Ensures minimal audio quality impact with less than 1 dB insertion loss.
• UL Registered Transformer: The transformer is UL registered per UL1876.

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About the JBL MTC-CBT-70T Bolt On Transformer Module for CBT 70 Models

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.

Key Features

• Distributed Audio System Integration: Allows CBT 70J-1 and CBT 70JE-1 speakers to be used in 70V and 100V distributed audio systems.
• Power Taps: Offers power taps at 120W, 60W, and 30W for both 70V and 100V lines, with an additional 15W tap for 70V systems only.
• Secure Connection: Features a barrier strip terminal for secure bare-wire connections.
• Watertight Seals: Includes two gland nuts for a watertight seal using round-jacketed speaker cable between 4.0 mm and 9.0 mm in diameter.
• Bolts Onto Speaker Cabinet: Attaches directly to the back of the CBT 70J-1 or CBT 70JE-1 speaker cabinet using included hardware.
• Environmental Protection: Built with a fiberglass-filled ABS enclosure, it is IP-55 rated for outdoor use.
• Minimal Insertion Loss: Ensures minimal audio quality impact with less than 1 dB insertion loss.
• UL Registered Transformer: The transformer is UL registered per UL1876.

JBL MTC-CBT-70T Bolt On Transformer Module for CBT 70 Models Specs

Product Function
Type
Bolt-On Transformer Module
Purpose
Adds 70V/100V Constant-Voltage Compatibility
Compatibility
Designed For
Specific JBL CBT 70 Series Column Speakers
Electrical Specifications
Input Compatibility
70V & 100V Constant-Voltage Lines
Transformer Taps
Multiple Power Tap Settings (e.g., 1W, 2W, 5W...)
Connection Type
Terminal Block or Professional Connector
Physical Installation
Mounting Method
Bolts to Speaker Enclosure
Integration
Maintains speaker's aesthetic and form factor
System Impact
Acoustic Performance
Does not alter speaker's DSP or beam pattern
Primary Benefit
Enables integration into commercial distributed audio systems

Key Features

• Distributed Audio System Integration: Allows CBT 70J-1 and CBT 70JE-1 speakers to be used in 70V and 100V distributed audio systems.
• Power Taps: Offers power taps at 120W, 60W, and 30W for both 70V and 100V lines, with an additional 15W tap for 70V systems only.
• Secure Connection: Features a barrier strip terminal for secure bare-wire connections.
• Watertight Seals: Includes two gland nuts for a watertight seal using round-jacketed speaker cable between 4.0 mm and 9.0 mm in diameter.
• Bolts Onto Speaker Cabinet: Attaches directly to the back of the CBT 70J-1 or CBT 70JE-1 speaker cabinet using included hardware.
• Environmental Protection: Built with a fiberglass-filled ABS enclosure, it is IP-55 rated for outdoor use.
• Minimal Insertion Loss: Ensures minimal audio quality impact with less than 1 dB insertion loss.
• UL Registered Transformer: The transformer is UL registered per UL1876.

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