JBL Control 424C/T - Pack of 2 Coaxial Ceiling Speakers with CRBI Technology
The JBL Control 424C/T is a 4-inch (100 mm) two-way coaxial ceiling speaker designed specifically for professionals seeking superior acoustic performance with seamless architectural integration. This package includes two units, providing a complete solution for small to medium-sized installations. Its most outstanding feature is JBL's innovative CRBI (Coplanar Radiation Boundary Integrator) technology, exclusive to JBL, which guarantees exceptionally uniform and consistent sound coverage throughout the listening space. This technology minimizes hot spots and dead zones, ensuring that everyone in the room experiences clear, intelligible, and balanced sound, regardless of their location.
With its sleek and understated design, the Control 424C/T features a frameless ("zero-bezel") grille that attaches magnetically and can be painted to match any décor. Its low profile allows for near-invisible integration into the ceiling. Beyond its aesthetic appeal, it offers installer flexibility thanks to its 16-ohm nominal impedance, enabling up to four speakers to be connected in parallel to a single 4-ohm amplifier channel. For larger projects, a high-quality 30W transformer is included for use with 70V or 100V distributed line systems.
Main Features
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Exclusive CRBI™ Technology: The coplanar radiation boundary integrator optimizes sound dispersion, providing exceptionally wide and consistent 130° conical coverage. This reduces the number of speakers needed to cover an area, optimizing installation costs and time.
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High Fidelity Coaxial Performance: Equipped with a 4-inch (100mm) treated paper cone woofer and a 0.75-inch (19mm) soft dome tweeter, it delivers a smooth and detailed frequency response, ideal for both background music and voice announcements.
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Discreet and Frameless Design: The bezel-less magnetic grille integrates seamlessly into any ceiling surface, offering a modern and minimalist look. The grille and baffle can be painted to complement the surrounding aesthetic.
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Flexible Installation: Its dual impedance capability (16 ohms) and compatibility with 70V/100V lines (with pre-installed 30W transformer) make it suitable for a wide range of audio system configurations, from the simplest to the most complex.
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Robust and Reliable Construction: Designed for long service life, it incorporates a PTC power limiter to protect components against overloads, ensuring safe and durable operation. It meets the most stringent safety standards, including UL1480A and UL2043.
Benefits for the Installer and the User
For the professional installer, the Control 424C/T simplifies the design and implementation process. Its wide coverage reduces project complexity, and the 16-ohm parallel connection capability facilitates wiring and maximizes amplifier efficiency. For the end user, the benefit is a superior listening experience. The immersive, homogeneous sound provided by CRBI technology creates a pleasant environment, with music and speech heard with exceptional clarity throughout the room, without auditory fatigue.
Use Cases
Thanks to its high-fidelity performance, uniform coverage, and discreet design, the JBL Control 424C/T is the ideal choice for a wide variety of commercial and professional applications, including:
- Restaurants and cafes
- Retail stores and boutiques
- Conference rooms and corporate offices
- Hotels and lobbies
- Museums and art galleries
- Educational centers and classrooms
- Ambient music and public address systems
Frequently Asked Questions
Does this product include one or two speakers?
This product is sold as a package that includes two (2) units of the JBL Control 424C/T speaker.
What is CRBI technology and why is it important?
CRBI (Coplanar Radiation Boundary Integrator) is a patented JBL technology that improves speaker directivity to deliver much more consistent sound across a wide 130° area. This means the sound is clear and balanced both directly beneath the speaker and at the edges of its coverage area.
Do I need a specific amplifier for these speakers?
Not necessarily. Thanks to their dual compatibility, they can be used with conventional low-impedance amplifiers (supporting a 4-ohm load if 4 speakers are connected in parallel) or with amplifiers designed for 70V or 100V distributed line systems.
Can the grilles be painted?
Yes, the magnetic grid is designed to be painted and thus perfectly match the decor of any space.
Are they suitable for playing music with bass?
The Control 424C/T offers a full and clear frequency response starting at 75 Hz. For applications requiring greater low-frequency extension and deeper bass impact, it is recommended to complement the system with a JBL in-ceiling subwoofer, such as the Control 419CS/T.
Project description
Two-pack of coaxial, two-way ceiling speakers with a 100mm (4-inch) woofer and a 19mm (0.75-inch) soft dome tweeter. Features CRBI technology for 130° conical coverage. Frequency response: 75Hz to 18kHz. Power handling: 60W (program) and 240W (peak). Nominal impedance: 16 ohms. Includes a 30W multi-tap transformer for 70V/100V lines. Frameless, paintable magnetic grille. Dimensions: 182mm high x 196mm diameter. UL1480A, UL2043, RoHS2, and IP33 certified.
