Digital matrix
The RIEDEL digital matrix by Stage Tec is used to distribute the various audio signals. Rooms 1, 4, 5, 13 and 14 are linked to one another by a central router and redundant fiber-optic connections in a star-shaped network. The central router can also transmit audio signals to the trade-fair center's audio platform and to the radio studios. 

Digital audio console
Rooms 1, 4, 5, 13 and 14 are equipped with a digital mixing console from Yamaha (Modell: LS932, M7CL, LS916), which has direct access to the matrix's inputs and outputs. The mixing console's input and output channels can be configured to meet any requirements (various EQs, compressors, limiters, gates and delays).

• Rooms 1 has a console LS 932 with 32 channel control strips. 
• Rooms 4, 5 and 13 have consoles LS 916 with 16 channel control strips. 
• Rooms 14 has a console M7CL with 40 channel control strips.
• In addition, slave consoles PM5D with  52 channel control strips are also available. They can be used in addition to the systems installed in each hall or when the rooms are partitioned. 

PA systems
Each of the rooms at the ICM is equipped with a public-address system. These systems are designed for optimum voice amplification.

Microphones
The ICM has suitable microphones of every type and from the most important manufacturers available for events of all kinds. Gooseneck-type capacitor microphones are available for lecterns, moderator podiums and boardroom tables. If high-quality recordings are required, a row of studio microphones can be used. Besides wired microphones, a Shure and Beyerdynamic UHF wireless system is available in each room that includes the following components:

Interpreter system
The ICM has a DCN (Digital Congress Network) system manufactured by Phillips. It can be used as an interpreter system (see room equipment for channel capacities) and as a panel-discussion system.

Intercom system
The ICM has two different intercom systems:

• 2-line (party line) system: This system is permanently installed in Rooms 1, 4, 5, 13 and 14. The control booths are equipped with fixed microphone positions.
  Connections for belt packs with headsets are available on the stages, catwalks, etc. 
• Riedel Artist M: For complicated productions, a Riedel digital intercom matrix with various microphone positions can be installed temporarily. It can be configured to meet the special needs of any event. If necessary, wireless units can also be incorporated into the communication system.