JBL Control 24CT Micro 4.5 Inch Compact Ceiling Loudspeaker Pair

Compact JBL Ceiling Speakers for Background Music and Paging

The JBL Control 24CT Micro is a compact 4.5" ceiling loudspeaker designed for background music and music-plus-paging systems. Sold as a pair, it is well suited to offices, restaurants, retail stores, hospitality spaces, airports, and other areas where wide coverage and shallow ceiling depth are important.

Each speaker combines a 4.5" injection-molded graphite woofer with a 0.5" polycarbonate tweeter and provides an extremely wide 150° conical coverage pattern.

Key Specifications

• Product type: Passive 70V/100V ceiling loudspeaker
• Sold as: Pair
• Low-frequency driver: 4.5" injection-molded graphite cone
• LF voice coil: 1"
• High-frequency driver: 0.5" polycarbonate tweeter
• Coverage: 150° conical
• Sensitivity: 86dB SPL
• Maximum SPL: 94dB at 1 meter using the 9W tap
• Frequency range: 85Hz–25kHz
• Crossover frequency: 3.5kHz
• Transformer: Built-in 9W multi-tap transformer
• Backcan: Integrated formed-steel blind-mount backcan
• Color: White

Who Should Choose the Control 24CT Micro?

Choose the Control 24CT Micro when you need compact ceiling speakers for distributed background music or paging and want very broad coverage with minimal ceiling depth.

The 150° coverage pattern can help reduce the number of speaker locations needed compared with narrower-dispersion ceiling speakers, depending on ceiling height, room layout, and required listening level.

4.5-Inch Graphite Woofer

Each Control 24CT Micro uses a 4.5" injection-molded graphite woofer with a 1" voice coil and butyl rubber surround.

The compact driver helps keep the enclosure shallow while still supporting clear voice reproduction and general background music.

0.5-Inch Polycarbonate Tweeter

A 0.5" polycarbonate high-frequency driver extends the speaker's response to 25kHz and complements the woofer for smooth speech and music reproduction.

150° Conical Coverage

JBL specifies an extremely wide 150° conical coverage pattern.

This broad dispersion is especially useful in background-music and paging systems where consistent sound across a room is more important than narrow directional output.

70V and 100V Distributed-Audio Operation

The Control 24CT Micro includes a built-in 9W transformer with selectable taps:

• 70V: 0.5W, 1W, 2W, 4W, or 9W
• 100V: 1W, 2W, 4W, or 9W

When using multiple speakers on a distributed-audio amplifier, add the selected tap wattages and allow appropriate amplifier headroom.

Important: No Direct 8-Ohm Mode

The Control 24CT Micro is the transformer-equipped version for 70V and 100V distributed-audio systems.

JBL's separate Control 24C Micro is the low-impedance version. Do not assume the Control 24CT Micro can be connected directly to a standard 8-ohm receiver unless the amplifier and system configuration are specifically designed for its transformer input.

85Hz–25kHz Frequency Range

JBL specifies an 85Hz–25kHz usable frequency range and 86dB sensitivity.

The Control 24CT Micro is designed primarily for background music and speech rather than high-output foreground music or deep bass reproduction.

Shallow 4-Inch Installation Depth

The compact enclosure is designed for installations with limited plenum space.

• Overall diameter: 7.7" (195 mm)
• Overall height: 4.2" (106 mm)
• Depth from ceiling surface to backcan: 4.1" (105 mm)
• Ceiling cutout: 6.6" (167 mm)
• Net weight: 4.4 lb (2.0 kg) each

Integrated Backcan and Air-Handling Compatibility

The Control 24CT Micro includes a formed-steel backcan and fire-rated baffle construction.

JBL lists the speaker for use in air-handling spaces under applicable UL1480, UL2043, NFPA90, and NFPA70 requirements. Always confirm local code requirements for the specific installation.

Included Tile Rails and C-Ring

Each speaker includes a C-shaped support backing plate, two tile-support rails, and a cutout template for ceiling installation.

The support hardware can be installed from below the ceiling opening, and the tile rails fit both standard 2-foot and 600 mm ceiling tiles.

Screw-Down Terminal Connections

The Control 24CT Micro uses touch-proof screw-down input terminals mounted on the outside of the backcan.

Use appropriately rated speaker wire for the amplifier voltage, cable length, and installation environment.

What's Included?

• 2 JBL Control 24CT Micro ceiling loudspeakers
• Integrated steel backcan on each speaker
• C-shaped support backing plate for each speaker
• 2 tile-support rails per speaker
• Cutout template
• Grille

Amplifier and speaker wire are sold separately.

Complete Your Ceiling Audio System

• JBL Professional
• In-Wall & In-Ceiling Speakers
• Speaker Wire

Need Help Planning Your Ceiling Speaker System?

Send Bear Security Shop your room dimensions, ceiling height, speaker quantity, and amplifier model. We can help confirm transformer tap settings, amplifier power, and speaker spacing.

Are the JBL Control 24CT Micro speakers sold as a pair?

Yes. The package includes two JBL Control 24CT Micro ceiling speakers.

What size drivers does the Control 24CT Micro use?

Each speaker uses a 4.5" injection-molded graphite woofer with a 1" voice coil and a 0.5" polycarbonate tweeter.

Does the Control 24CT Micro support 70V systems?

Yes. Available 70V taps are 0.5W, 1W, 2W, 4W, and 9W.

Does it support 100V systems?

Yes. Available 100V taps are 1W, 2W, 4W, and 9W.

Can I use the Control 24CT Micro with a regular 8-ohm receiver?

No direct 8-ohm mode is specified for the Control 24CT Micro. It is the transformer-equipped 70V/100V version. JBL's separate Control 24C Micro is the low-impedance version.

What is the coverage pattern?

JBL specifies an extremely wide 150° conical coverage pattern.

What is the frequency range?

JBL specifies an 85Hz–25kHz usable frequency range.

What is the sensitivity?

The Control 24CT Micro is rated at 86dB sensitivity.

What is the maximum SPL?

JBL specifies 94dB maximum SPL at 1 meter when using the highest 9W transformer tap.

How much ceiling depth is required?

The speaker is approximately 4.1" deep from the ceiling surface to the back of the integrated backcan.

What size ceiling cutout is required?

The required circular cutout is approximately 6.6" in diameter.

Does the speaker include a backcan?

Yes. Each speaker includes an integrated formed-steel blind-mount backcan.

Are tile rails included?

Yes. Each speaker includes a C-shaped backing plate, two tile-support rails, and a cutout template.