Control 424LP

4" CRBI™-Equipped Two-Way Coaxial Ceiling Loudspeaker with Low-Profile Enclosure


The JBL Control 424LP is a two-way coaxial ceiling loudspeaker, featuring a 4” woofer and a low-profile enclosure that is ideal for applications where ceiling plenum space is restricted. Integrated CRBI™ technology provides 130° of consistent, full, rich sound character that closely matches that of the Control 424C/T. 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. Like all Control 400 Enhanced Coverage models, the Control 424LP includes a transformer to support both 70V/100V and low impedance applications.

  • Coaxially mounted 100 mm (4 in) woofer and 19 mm (0.75 in) soft-dome tweeter
  • Low-profile enclosure (<100mm deep) for installing where ceiling plenum space is restricted
  • 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
Frequency Range (-10 dB)75 Hz – 18 kHz
Power Capacity120 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)
Sensitivity85 dB
Coverage Angle130° conical
Maximum SPL (1m)103 dB continuous pink noise (109 dB peak)
Nominal Impedance16 ohms
Transformer Taps70 V: 30 W, 15 W, 7.5 W & 3.7 W 100 V: 30 W, 15 W, 7.5 W
LF Driver100 mm (4 in)
HF Driver19 mm (0.75 in)
Dimensions107 mm (4.2 in) H x 253 mm (9.9 in) dia. 98 mm (3.9 in) from bottom of ceiling tile to top of backcan (with wire exit positioned on side of backcan).
Ceiling Cutout Size224 mm (8.8 in)
Safety Agency RatingSuitable 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.
EnvironmentalExceeds 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
Optional AccessoriesJBL-MTC-426BG black (RAL9004) magnetic round grille JBL-MTC-426SG white (RAL9003) magnetic square grille JBL-MTC-426NC new construction bracket JBL-MTC-426MR mud-ring construction bracket
ColourStock grille is white (RAL9003), paintable.
Net Weight (each)3.0 kg (6.7 lbs)
Shipping Weight (pair packed in carton)10.9 kg (24 lbs)
SKU NumbersJBL-C424LP
SKU Image Name Colour/description
JBL2156 Control 424LP Control 424LP
JBL2164 MTC-424 Black Round Grille MTC-424 Black Round Grille Black Round Grille
JBL2165 MTC-424 Mud Ring MTC-424 Mud Ring Mud Ring
JBL2166 MTC-424 New Construction Bracket MTC-424 New Construction Bracket Construction Bracket
JBL2167 MTC-424 Square White Grille MTC-424 Square White Grille Square White Grille