JBL Professional Control 24CT-BK - 4" Compact Ceiling Speaker with 70/100V Transformer (Black, 2 Units)
The JBL Professional Control 24CT-BK is a compact, ready-to-install ceiling speaker that delivers premium performance for background music, public address, and foreground applications. Its coaxial design combines a 100 mm (4") polypropylene-coated woofer with a butyl rubber surround and a 19 mm (¾") diffraction-charged titanium-coated tweeter , resulting in smooth response, low distortion, and exceptional vocal clarity. It comes standard with a 30 W multi-tap transformer for 70/100 V lines and includes a grille, backcan, and tile rails for quick and secure installation, especially in suspended ceilings. The black finish of the baffle and grille blends discreetly into dark ceilings.
Main features
-
2-way coaxial system : 4″ woofer (PP-coated cone, 25 mm voice coil in aluminum form) + 19 mm titanium-coated tweeter.
-
Very wide 130° coverage (conical): fewer points to cover the same area without sacrificing uniformity.
-
Integrated 70/100 V transformer : 30/15/7.5/3.7 W @ 70 V and 30/15/7.5 W @ 100 V sockets; max. insertion loss 0.8 dB.
-
Wideband response : 80 Hz – 20 kHz (−10 dB) ; sensitivity 86 dB and max. SPL 102 dB (1 m).
-
Formed steel backcan suitable for air handling spaces ( UL-2043 ) and paintable UL94V-0 baffle.
-
Removable 4-pole plug-in connector with screw terminals (input + line pass-through), supports up to 2.5 mm² .
-
Installation from below the ceiling: includes “C” reinforcement plate, tile rails (600×1200 mm / 2×4 ft), template and paint protector.
Product benefits
-
Lower installed cost : the 130° coverage allows for a reduction in the number of speakers while maintaining level and timbre.
-
Pleasant and immersive sound with warm bass thanks to the computer-optimized ported enclosure.
-
Quick installation : everything you need is in the box; no upper access to the ceiling is required to fix it.
-
Professional integration : prepared for 70/100 V distributed lines with socket selector accessible behind the grille.
Use cases
-
Offices, retail and restaurants with homogeneous background music and clear signs.
-
Hotels, museums and airports that need wide coverage and discreet aesthetics on dark ceilings.
-
Meeting rooms and corridors where uniformity and low distortion are required.
Frequently Asked Questions
-
Does it include the back box and grille? Yes, it comes with a back box , grille, and tile rails.
-
Does it work at low impedance? No. It is a model with an integrated transformer for 70/100 V (not direct operation at 8/16 Ω).
-
Can it be painted? Yes, the deflector and grille are paintable (painting protector included).
Project description
JBL Control 24CT-BK ceiling speaker (pair, black), 2-way , 130° conical coverage; frequency response (−10 dB) 80 Hz–20 kHz ; sensitivity 86 dB (100 Hz–10 kHz, half-space); max. SPL 102 dB (1 m); transformer 70 V: 30/15/7.5/3.7 W , 100 V: 30/15/7.5 W , max. loss 0.8 dB . Transducers: LF 100 mm (PP-coated cone, 25 mm VC in aluminum former) + HF 19 mm (titanium-coated polyester, diffraction-charged). Physical: Front diameter 195 mm , overall height 200 mm , installed depth (front of tile to back of backcan) 184 mm ; cutout diameter 168 mm ; Net weight 3.5 kg (unit). Includes steel back can , reinforcement plate, tile rails, cutting template, paint protector, and plug-in connector.
