C24CT-BK-B vs CSS-1S-T — Compare
JBL C24CT-BK 4" 2-WAY Coaxial Ceiling Spk W Transformer, Blk (Pair) B-Stock vs JBL Commercial 2-way Surface-Mount Speaker with 8-ohm.. 5.25" 2-WAY SURFACE-MOUNT SPK W TRANSFORMER (Pair)
The C24CT-BK is a flush-mount ceiling speaker optimized for distributed-line (70V/100V) systems in large commercial spaces, while the Control 25-1 is a surface-mount wall speaker with 8-ohm transformer suited to smaller rooms and retrofit installations. Choose the C24CT-BK for office buildings, retail chains, and hospitality venues requiring long-run cabling; choose the Control 25-1 for individual rooms, smaller offices, or spaces where wall mounting is preferable.
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JBL C24CT-BK 4" 2-WAY Coaxial Ceiling Spk W Transformer, Blk (Pair) B-Stock
JBL Commercial 2-way Surface-Mount Speaker with 8-ohm.. 5.25" 2-WAY SURFACE-MOUNT SPK W TRANSFORMER (Pair)
Specs side by side
| JBL C24CT-BK 4" 2-WAY Coaxial Ceiling Spk W Transformer, Blk (Pair) B-Stock | JBL Commercial 2-way Surface-Mount Speaker with 8-ohm.. 5.25" 2-WAY SURFACE-MOUNT SPK W TRANSFORMER (Pair) | |
|---|---|---|
| Price | $280.00 | $344.49 |
| Brand | JBL | JBL |
| Speaker Type | Ceiling | Surface-Mount |
| Install Type | Installed | Installed |
| Condition | Refurbished | New |
Why choose JBL C24CT-BK 4" 2-WAY Coaxial Ceiling Spk W Transformer, Blk (Pair) B-Stock
- ✓ Flush-mount design hides in ceiling cavity with only 7.2" depth
- ✓ Multitap transformer supports both 70V and 100V distributed-line systems
- ✓ Four switchable power taps (30W, 15W, 7.5W) eliminate need for external transformers
- ✓ Coaxial architecture delivers consistent 130° coverage without placement compromise
Why choose JBL Commercial 2-way Surface-Mount Speaker with 8-ohm.. 5.25" 2-WAY SURFACE-MOUNT SPK W TRANSFORMER (Pair)
- ✓ Surface-mount simplicity—no ceiling modification or cavity work needed
- ✓ Higher sensitivity at 90 dB (1W/1m) requires less amplifier power
- ✓ Rugged MilSpec 810 and ASTM G85 durability for indoor and semi-outdoor use
- ✓ Wider tweeter frequency response to 20 kHz versus C24CT's 20 kHz spec
Frequently asked questions
Which speaker is better for a large office building with multiple zones?
The C24CT-BK is designed for distributed-line systems and excels in multi-zone, multi-floor installations. Its 70V/100V transformer and switchable taps let you cover many rooms from a single amplifier without running heavy speaker wire. The Control 25-1 works best for individual rooms or small clusters.
Can I use the Control 25-1 as a drop-in replacement for the C24CT-BK?
No. The C24CT-BK mounts in the ceiling; the Control 25-1 mounts on walls. The C24CT-BK uses 70V/100V distributed-line taps; the Control 25-1 uses an 8-ohm transformer. They serve different installation types and system architectures.
Which requires less amplifier wattage?
The Control 25-1 has 90 dB sensitivity, making it more efficient and requiring less amplifier power per unit. The C24CT-BK is also professional-grade but designed for larger distributed systems where multiple speakers share one amp and transformer taps match impedance.
Which is tougher for outdoor or semi-outdoor use?
The Control 25-1 exceeds MilSpec 810 standards for humidity, salt spray, temperature, and UV exposure, and passes ASTM G85 salt-spray and acid-air testing. The C24CT-BK is rated for indoor commercial and institutional spaces and does not carry equivalent outdoor durability certifications.