JBL CBT 70JE-1 Extension for CBT J-1 Speaker (Black)

Overview

The JBL CBT 70JE-1 is an extension module designed to complement the CBT 70J-1 column speaker, enhancing its bass response and overall output. It adds four 5-inch low-frequency drivers and extends the system’s low-frequency range down to 45 Hz, delivering deeper bass and improved pattern control. This extension is ideal for venues that require clear speech intelligibility alongside rich music reproduction, such as lecture halls, auditoriums, and outdoor concourses.

Key features

• Designed to seamlessly connect with the JBL CBT 70J-1 column speaker for a unified sound source
• Extends bass response to 45 Hz, providing fuller and warmer low-end sound
• Incorporates four 5-inch low-frequency drivers to increase punch and headroom
• Built-in crossover network ensures smooth integration with the main speaker array
• Enhances pattern control for more even sound coverage across seating areas
• Handles up to 500 W RMS power for reliable, high-level performance
• Durable enclosure made from fiberglass-reinforced ABS to withstand demanding environments
• Includes a coupler plate for easy alignment and mounting with the main speaker
• Well suited for a variety of settings including auditoriums, lecture halls, stadium concourses, and outdoor venues

Key specs

• Low-frequency extension: down to 45 Hz
• Drivers: four 5-inch low-frequency drivers
• Power handling: 500 W RMS
• Enclosure material: fiberglass-reinforced ABS

Installation and setup

Installation is straightforward thanks to the supplied coupler plate, which aligns the CBT 70JE-1 precisely with the CBT 70J-1 column speaker. This ensures the two cabinets operate as a single coherent source, simplifying setup and maintaining consistent sound quality. The robust enclosure material keeps the unit lightweight yet durable, making it easier to handle during installation and suitable for long-term use in various environments.

Ideal uses and environments

This extension module is a strong choice for venues that demand clear speech and full music reproduction without complicated additional processing. It works well in lecture halls and auditoriums where speech intelligibility is critical, while also adding warmth and depth to music playback. Outdoor venues and stadium concourses benefit from its ability to deliver authoritative announcements and engaging background music, making it a versatile addition to professional sound systems.