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Description:
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.
Superior Sonic Performance
The Coplanar RBI™, or CRBI™ delivers an especially smooth sound character that remains consistent, clear, and pleasant across a wide coverage area. It reduces on-axis hot spots and off-axis cold spots and improves the listening experience for users as they move throughout a space. This enhanced coverage results in fewer speakers, amplifier channels, and project costs, required to cover a space.
Efficient, Flexible Installation
Various Control 400 Enhanced Coverage Series mounting enhancements improve installation repeatability and safety while reducing installation time. Redesigned terminal covers provide both top and side cable entry ports and can be secured without tools thanks to captive hand-screws. The captive dogear design is extremely reliable and works with a wide range of ceiling thicknesses.
Refined, Modern Aesthetics
Full-face magnetic grilles provide a sleek, refined look to meet the sensibilities of modern architectural design. They are equipped with safety tethers, which mount right into the baffle to ensure peace of mind. Optional black and square accessory grilles are also available to empower added design versatility.
Features:
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
Specifications:
Frequency Range (-10 dB): 75Hz - 18kHz
Power Capacity:
60W (240 W Peak), Cont. Pink Noise (2 hrs.)
40 W (160 W Peak) Cont. Pink Noise Power (100 hrs.)
Sensitivity (1m/1W): 85dB
Coverage Angle: 130° conical
Maximum SPL (1m): 103 dB continuous pink noise (109 dB peak)
Nominal Impedance: 16Ω
Transformer Taps:
70 V: 30 W, 15 W, 7.5 W & 3.7 W
100 V: 30 W, 15 W, 7.5 W
Drivers:
LF: 100 mm (4 in) with treated paper cone and high-performance magnet
HF: 19 mm (0.75 in) textile soft-dome with Neodymium magnet assembly
Ceiling Cutout Size: 168 mm (6.6 in)
Dimensions:
182 mm (7.2 in) H x 196 mm (7.7 in) dia.
173 mm (6.8 in) from bottom of ceiling tile to top of backcan
Safety Agency Rating: Suitable for use in air handling spaces per UL2043, NFPA 90A & NFPA 70, CSA C22.2 no. 205 and S7232/UL1480A Listed.
Environmental:
IP33 rating per EN/IEC 60529.
Operating temperature 0°C to 45°C
Optional Accessories:
JBL-MTC-424BG black (RAL9004) round grille
JBL-MTC-424SG white (RAL9003) square grille
JBL-MTC-424NC new construction bracket
JBL-MTC-424MR mud-ring construction bracket
JBL-MTC-48TRX4 tile rail for 4' x 4' ceiling tiles
Color: Stock grille is White (RAL9003), paintable
Net Weight (ea): 2.8 kg (6.2 lbs)
Shipping Weight (pair): 10.57 kg (23.31 lbs)
Generating expert take…
JBL traces its roots to 1946, when pioneering audio engineer James Bullough Lansing founded the company in Los Angeles, California, initially as James B. Lansing Sound, Incorporated. A veteran of loudspeaker design from earlier ventures like the Lansing Manufacturing Company and collaborations on Hollywood's first practical cinema systems, Lansing infused JBL with his relentless pursuit of acoustic clarity and fidelity. Though he passed away in 1949 amid financial strains, the brand endured under new leadership, accelerating in 1969 with acquisition by Harman International—now under Samsung—fueling global expansion and innovation.
JBL excels across professional and consumer audio realms, renowned for its loudspeakers that dominate studios, touring rigs, cinemas, and home setups. Iconic models like the D-130 woofer, Paragon stereophonic system, and L-100 Century defined eras of high-output sound, while modern lines span portable Bluetooth speakers, wireless headphones, soundbars, and pro monitors. The brand prioritizes robust transducers, advanced horns, and diamond-surround tech over niche components like turntables, DACs, or cables.
Positioned as a mid-tier powerhouse with pro-grade heritage, JBL commands respect among discerning buyers for delivering punchy, reliable performance at accessible prices, bridging live-event energy and home listening without high-end esoterica. Its vintage icons draw collectors, yet contemporary ubiquity in arenas and everyday gear cements market dominance for those valuing scale and excitement over boutique refinement.
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