JBL C24CT-BK 4" 2-WAY Coaxial Ceiling Spk W Transformer, Blk B-Stock
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- SKU
- C24CT-BK-B
Description
JBL C24CT-BK 4" 2-Way Coaxial Ceiling Speaker with Transformer
The C24CT-BK is a professional-grade ceiling speaker built to deliver consistent coverage in distributed audio systems for venues, retail spaces, hospitality rooms, and institutional installations. Its compact 7.2" depth fits standard ceiling cavities for flush-mount setup, and the included back can and tile rails get you installed and operational without custom fabrication. The coaxial design ensures even sound coverage across the listening area without requiring multiple speaker placements.
70V/100V Transformer System
The integrated 30W multitap transformer handles both 70V and 100V line-level operation—the standard for long-run audio distribution in larger venues and multi-room installations. Switchable taps at 30W, 15W, 7.5W (plus 37W at 70.7V) let you dial in the right impedance match for your system setup without needing external transformers or adapters.
Acoustic Coverage & Reliability
The coaxially mounted 4" woofer with butyl rubber surround and 0.75" titanium-coated diffraction-loaded tweeter deliver a 130° coverage pattern across an 80 Hz–20 kHz frequency response, spreading sound evenly throughout typical room sizes. SonicGuard Overload Protection guards the drivers against peak-level damage during extended operation, so your system stays dependable night after night.
Key Features
- 4" woofer with butyl rubber surround
- 0.75" titanium-coated diffraction-loaded tweeter
- Coaxial speaker design for integrated frequency response
- 30W multitap transformer for 70V or 100V distributed-line systems
- Switchable transformer taps: 30W, 15W, 7.5W (plus 37W at 70.7V)
- Frequency Response: 80 Hz to 20 kHz
- 86 dB sensitivity
- 130° coverage pattern
- 7.2" depth from flush ceiling
- Formed steel back can
- Includes grille, back can, and tile rails
- SonicGuard Overload Protection
The C24CT-BK pairs flexible transformer configuration with reliable overload protection and proven acoustic engineering in a compact ceiling format built for venues that demand consistent, road-proof performance.
More Information
| Condition | Refurbished |
|---|
Reviews
At a Glance
The JBL C24CT-BK is a professional 4-inch coaxial ceiling speaker built for distributed audio in commercial spaces like offices, retail, and hospitality venues. Its integrated 30W multitap transformer handles both 70V and 100V line systems with switchable taps, eliminating the need for external gear and simplifying long-run installations. SonicGuard overload protection keeps the coaxial driver pair safe during sustained operation, making this a dependable choice for anyone running sound across multiple rooms or zones.
Who This Is For
Great for
- ✓ Installed audio systems
- ✓ Commercial spaces
- ✓ Background music distribution
Not the best pick for
- – Live performance
- – Stage monitoring
- – High-fidelity music listening
Skill level: Beginner · Intermediate · Advanced · Professional
Frequently Asked Questions
What does B-Stock mean?
B-Stock means this speaker is fully functional and meets all performance specs, but may have minor cosmetic imperfections from handling or display. Acoustic and electrical performance are identical to new units.
Do I need a separate transformer for 70V or 100V systems?
No. The C24CT-BK includes a built-in 30W multitap transformer with switchable taps at 30W, 15W, and 7.5W (plus 37W at 70.7V), so you can match impedance directly without external gear.
What is the coverage pattern and how deep does it need to be installed?
The speaker has a 130° coverage pattern suitable for typical room sizes and installs flush into standard ceiling cavities with only 7.2 inches of depth. It comes with a back can and tile rails for straightforward mounting.
Is this speaker suitable for high-fidelity music listening or live performance?
No. The C24CT-BK is engineered for background music distribution and commercial audio in offices, retail, and hospitality spaces. It is not intended for critical listening, studio monitoring, or live stage use.
What protection does SonicGuard provide?
SonicGuard Overload Protection safeguards the 4-inch woofer and 0.75-inch tweeter against peak-level damage during sustained operation, extending speaker life in always-on environments.
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