JBL Control 424C/T 4-Inch CRBI-Equipped 2-Way Coaxial Ceiling Loudspeaker

The JBL Control 424C/T is a 4-inch two-way coaxial ceiling loudspeaker from the Control 400 Enhanced Coverage Series, featuring JBL's exclusive Coplanar Radiation Boundary Integrator (CRBI) technology - delivering exceptionally consistent 130-degree conical coverage that reduces on-axis hot spots and off-axis cold spots throughout the listening area.

For A/V designers and integrators seeking a premium 4-inch ceiling speaker for retail, corporate, hospitality, or education spaces, the Control 424C/T provides superior coverage consistency compared to standard coaxial designs, often allowing fewer speakers to cover a given area without sacrificing uniformity. The included 70V/100V transformer and 8-ohm direct input support flexible system design.

Control 400 Enhanced Coverage Series models share JBL's redesigned terminal covers with top and side cable entry ports, tool-free captive hand-screws, and a dogear mounting system that accommodates a wide range of ceiling thicknesses. Magnetic, paintable, bezel-less grilles with integrated safety tethers ensure a refined appearance while meeting UL 1480A, UL 2043, NFPA 90A, and NFPA 70 plenum-installation requirements.

Key Features

• CRBI Coplanar Radiation Boundary Integrator: JBL's exclusive CRBI technology provides 130-degree conical coverage with dramatically reduced on-axis hot spots and off-axis cold spots for a more pleasant listening experience throughout the space.
• 4-Inch Two-Way Coaxial Driver: 100mm woofer and 19mm soft-dome tweeter deliver full-range coverage from 75 Hz to 18 kHz with high efficiency.
• 70V/100V and Direct Operation: Integrated transformer supports both distributed-line and 8-ohm low-impedance system configurations.
• Paintable Magnetic Grille: Full-face bezel-less magnetic grille with integrated safety tether provides a contemporary aesthetic and easy paint customization.
• Captive Dogear Mounting: Dogear design accommodates various ceiling thicknesses for efficient, repeatable installation.
• Plenum-Rated: UL 1480A and UL 2043 listed for air-handling ceiling plenum environments.

Technical Specifications

• LF Driver: 100 mm (4 in) woofer
• HF Driver: 19 mm (0.75 in) soft-dome tweeter
• Frequency Range: 75 Hz - 18 kHz
• Coverage Pattern: 130 degrees conical (CRBI)
• Transformer: 70V/100V multi-tap
• Impedance (Direct): 8 ohm
• Sold As: Pair
• IP Rating: IP33 per EN/IEC 60529
• Safety Certifications: UL 1480A, UL 2043, NFPA 90A, NFPA 70, CSA C22.2 No. 205
• Operating Temperature: 0 deg C to 45 deg C

What's Included

• (2) JBL Control 424C/T Ceiling Loudspeakers
• Mounting Hardware
• White Round Paintable Magnetic Grilles