Sonifex CM-TB8 Talkback Control Unit 8 Channels of 4 Wire Comms

£3,387.77 £2,823.14
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SKU
CM-TB8

The CM-TB8 is a powerful and highly flexible self-contained communications unit allowing multiple 4-wires and IFBs within a single 1U rack space. It offers an easy connection to any industry-standard talkback system including the Sonifex CM-TLL line listen to unit plus the CM-CU1 and CM-CU21 commentator units.

Sonifex CM-TB8 Talkback Control Unit 8 Channels of 4 Wire Comms

FEATURES

  • 8 Channel talkback control unit in a 1U rackmount package.
  • Separate microphone and headset inputs with phantom power and individual gain settings.
  • Microphone talk levels can be instantly adjusted or preset.
  • Talk level LEDs and built-in limiter.
  • Configurable ‘Group Talk’ function.
  • Interruptible Foldback and direct 4-Wire operation selectable on each channel with optional talkback-microphone mix function.
  • 2 external IFB (Interruptible Foldback) inputs are available to each channel. 
  • Optional telephone hybrid or GSM ports allow direct connection to a telephone line for remote communications.
  • Individual monitor level control for each channel. 
  • Microphone output feed which is gain adjusted & level limited.
  • Ethernet connection for remote configuration with the built-in web server.
  • 6 stored configuration templates with 4 user-editable sets. 
  • Front panel loudspeaker with separate feed for an external loudspeaker.
  • Loudspeaker mute and dim controls, also available on remote input.
  • Remote ‘tally’ outputs indicating when each channel is active.
  • Remote inputs providing a call indication on each channel.
  • Built-in tone generator for channel identification.

The CM-TB8 8 Channel Talkback Control Unit is ideal in an OB truck or small studio. The CM-TB8 is a talkback control unit providing 8 channels of 4-wire communication, housed in a 1U rack mount enclosure.

The unit has individual connections for both a headset on 5 pin XLR and microphone/headphones on XLR/stereo TRS jack, with the current selection indicated on the front panel. The gain setting for each input type can be individually set between +6dB and +68dB allowing for a wide range of microphone types and +48V phantom power is also available. Small talk level adjustments can be made quickly, using the front panel rotary control with a maximum adjustment range of ±12dB. This adjustment can be disabled if required to stop inadvertent changes. A level limiter automatically adjusts the microphone gain if the signal level exceeds a preset level, and the current talk level is indicated on the front panel when it exceeds 0dB and +8dB. A separate output on the rear panel provides a balanced, gain adjusted and level limited microphone signal on 3 pin XLR.

SPECIFICATIONS

Microphone Input

Gain Range: +6dB to +68dB
Maximum Input Level: -6dBu
C.M.R.R.: >60dB
Frequency Response: ±0.5dB 20Hz to 15kHz Ref 50dB gain @ 1kHz
   

Headphone Output

Gain Range: -60dB to +18dB
Maximum Output Level: +18dBu
Frequency Response: ±0.5dB 20Hz to 15kHz
   

4-Wire And IFB Inputs

Maximum Input Level: +18dBu
Frequency Response: ±1dB 20Hz to 15kHz
 

Talkback Outputs

Maximum Output Level: +18dBu
Frequency Response: ±1dB 20Hz to 15kHz
   

Loudspeaker

Power Output: 6W
Noise: More than 80dB below full output
Volume: Mute to full volume via front panel potentiometer
   

Connections

Microphone: XLR-3 pin female (electronic balanced)
Headphones: 6.35mm stereo jack socket
Headset: XLR-5 pin female (input electronic balanced)
4-Wire Inputs: 8 x XLR-3 pin female (transformer balanced)
IFB Inputs: 2 x XLR-3 pin female (transformer balanced)
Talkback Outputs: 8 x XLR-3 pin male (transformer balanced)
Microphone Output: XLR-3 pin male (electronic balanced)
Loudspeaker Output: 6.35mm stereo jack socket
Remote Inputs: 15-way ‘D’-type socket
Remote Outputs: 15-way ‘D’-type socket
Ethernet: RJ-45

Each channel can be set to either 4-Wire or Interruptible Foldback operation. In 4-Wire mode