JBL CONTROL 424C/T

The JBL Control 424C/T is a two-way coaxial ceiling loudspeaker, featuring a 4” woofer and integrated enclosure that is ideal for installation in most ceiling plenum spaces. Integrated CRBI™ technology provides 130° of consistent, full, rich sound to the listening area. A full-face magnetic grille blends seamlessly with modern decors and optional black and square grilles are available. Mechanical improvements include redesigned terminal covers with top and side cable entry ports and an extremely reliable new dogear design that works with a wide range of ceiling thicknesses. The JBL Control 424C/T includes a transformer to support both 70V/100V and low impedance applications.

More Information

Coaxially mounted 100 mm (4 in) woofer and 19 mm (0.75 in) soft-dome tweeter
Integrated enclosure that is ideal for installation in most ceiling plenum spaces
CRBI™ technology for consistent 130° coverage across the listening area
Built-in 70V/100V multi-tap transformer, plus 16-ohm direct input
Full-face, easily paintable magnetic grilles
Top and side exit cable entry options
Robust and adaptable dogears for wide range of ceiling thicknesses
IP33 rated

Technical Specification

Specifications 
System
Frequency Range (-10 dB)1
: 75 Hz – 18 kHz
Frequency Response (±3 dB)1
: 88 Hz – 17 kHz
Power Capacity2
: 120 W Continuous Program (2 hrs)
60 W (240 W Peak), Continuous Pink Noise (2 hrs)
40 W (160 W Peak) Continuous Pink Noise Power (100 hrs)
Sensitivity: 85 dB (ave.100 Hz – 10 kHz)
Nominal Coverage Angle3
: 130° conical
Directivity (Q)3
: 3.3
Directivity Index (DI)3
: 5.2 dB
Rated Maximum SPL @ 1 m4
: 103 dB continuous pink noise (109 dB peak)
Nominal Impedance: 16 ohms
Minimum Impedance: LF Range: 17.2 ohms at 283 Hz; System: 16.8 ohms at 13 kHz
Transformer Taps: 70 V: 30 W, 15 W, 7.5 W & 3.7 W
100 V: 30 W, 15 W, 7.5 W
Recommended Protective High-Pass Filter
Frequency: 70 Hz (24 dB/oct LR)
Transformer Insertion Loss: 0.7 dB @ 3.7 W; 0.8 dB @ 7.5 W; 0.9 dB @ 15 W; 0.9 dB @ 30 W
Maximum Input Voltage: 31 V RMS (2 hrs), 62 V peak (at 16 ohm input)
Overload Protection: PTC power limiting to protect network and transducers from occasional overload.
Coplanar RBI Driver Integrator (CRBI): LF acoustic loading, tapered L-shaped apertures. Back of loading plate functions as LF waveguide, foam-lined for
smooth midrange frequency response. Provides smooth, consistent coverage of listening space. Horn-loaded HF
driver integrated into front of CRBI for maximum coherence.
Safety Agency Ratings: Suitable for use in air handling spaces per UL1480A, UL2043, NFPA90 & NFPA70, S7232/UL Listing, Speakers for
Commercial and Professional Use. Listed per CSA C22.2, no. 205 Signal Equipment. In accordance with IEC60849/
EN60849.
Environmental: Exceeds Mil Spec 810H for humidity, salt spray, temperature & UV. IP33 rating per EN/IEC 60529 against solid
object and water ingress. Compliant with RoHS2 per EN/IEC63000. Operating temperature 0°C to 45°C
Transducers:
LF Driver: 100 mm (4 in) treated paper cone with mechanical LPF contour, high-performance magnet, 19 mm (0.75 in) copper
voice coil on aluminum voice coil former
HF Driver: 19 mm (0.75 in) textile soft-dome, neodymium magnet assembly, Kapton™ voice coil former

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