Product Parameters
- Model Number: CCS-CU
- Manufacturer: Bosch Security Systems
- Series: CCS 900 Ultro Discussion System
- Capacity: Controls up to 50 Discussion Units
- Frequency Response: 30 Hz to 20 kHz
- Total Harmonic Distortion: < 0.5%
- Audio Inputs: 1x Mic (XLR/Jack), 1x Line (RCA)
- Audio Outputs: 1x Line (RCA), 1x Record (RCA)
- Monitor Loudspeaker: Built-in with volume control
Product Description The CCS-CU is the central component of the Bosch CCS 900 Ultro Discussion System, providing the necessary power and sophisticated audio processing for all connected delegate and chairman units. It features a unique “Possible-To-Speak” indicator and advanced digital acoustic feedback suppression to ensure crystal-clear speech intelligibility. The unit offers four easy-to-use operating modes—Open, Override, PTT (Push-To-Talk), and Chairman Only—allowing for flexible management of various meeting and conference types without the need for an external operator.
Product Applications This control unit is primarily designed for small to medium-scale conference venues, including town halls, local government meeting rooms, corporate boardrooms, and international courtrooms. It provides a reliable and cost-effective solution for organized discussion environments where speech clarity and structured turn-taking are essential. Its portable design also makes it a popular choice for mobile conference services and temporary event installations.
Product Specifications
- Weight: 1.50 kg
- Dimensions: 8.4 cm x 36.1 cm x 14.3 cm
- Country of Origin: Portugal / China
- Mounting: Tabletop or 19-inch rack (with optional brackets)

Operational Precautions
- Connection Limit: Do not exceed the maximum of 50 discussion units per control unit; for larger systems, use a secondary extension unit or professional integration hardware.
- Feedback Suppression: Ensure the “Acoustic Feedback Suppression” function is toggled on when the system is used in small, reflective rooms to prevent high-pitched ringing.
- Cabling Integrity: Use only the proprietary Bosch CCS 900 multi-pole cables for trunk connections to ensure balanced audio signals and stable DC power distribution.
- Volume Management: Adjust the master volume and the built-in monitor speaker separately to avoid internal loop feedback when the control unit is located close to the chairman’s microphone.
Recommended Similar Product Models
| Model Number | Series | Component Type |
|---|---|---|
| CCS-CURD | CCS 900 | Control Unit with MP3 Recording & DAFS |
| CCS-DL | CCS 900 | Delegate Unit with Long Microphone |
| CCS-CMS | CCS 900 | Chairman Unit with Priority Button |
| CCS-DS | CCS 900 | Delegate Unit with Short Microphone |
| DCN-CCU2 | DCN Next Gen | Central Control Unit (Digital) |
