Product Descriptions
Control 424C/T 4-Inch Two-Way Coaxial Ceiling Speaker
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.
Specifications
Frequency Range (-10 dB) 75 Hz – 18 kHz Frequency Response (±3 dB) 88 Hz – 17 kHz Power Capacity 120 W Continuous Program (2 hrs); 60 W (240 W Peak) Continuous Pink Noise (2 hrs); 40 W (160 W Peak) Continuous Pink Noise (100 hrs) Sensitivity 85 dB (ave. 100 Hz – 10 kHz) Nominal Coverage Angle 130° conical Directivity (Q) 3.3 Directivity Index (DI) 5.2 dB Rated Maximum SPL @ 1 m 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 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 Enclosure Material Backcan: Powder-coated formed steel. Baffle: Polypropylene, flammability rated UL94V-0. Grille: Magnetic bezel-less, SPCC steel grille with powder-coat finish, decorative minimal-edge trim, flammability-rated backing (removable and re-applicable for p