Sonifex CM-TB8 Talkback Control Unit 8 Channels of 4 Wire Comms
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 |
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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 |
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Gain Range: | -60dB to +18dB |
Maximum Output Level: | +18dBu |
Frequency Response: | ±0.5dB 20Hz to 15kHz |
4-Wire And IFB Inputs |
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Maximum Input Level: | +18dBu |
Frequency Response: | ±1dB 20Hz to 15kHz |
Talkback Outputs |
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Maximum Output Level: | +18dBu |
Frequency Response: | ±1dB 20Hz to 15kHz |
Loudspeaker |
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Power Output: | 6W |
Noise: | More than 80dB below full output |
Volume: | Mute to full volume via front panel potentiometer |
Connections |
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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 |