Sonifex CM-TB8 8 Channel Talkback Control Unit, 8 Channel 4 Wire Communications

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 easy connection to any industry standard talkback system including the Sonifex CM-TLL line listen unit plus the CM-CU1 and CM-CU21 commentator units.

Key Features

• 8 Channel talkback control unit in a 1U rack mount package
• Separate microphone and headset inputs with phantom power and individual gain settings
• Microphone talk level 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 available to each channel

Technical 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, 10/100Mbps
Telephone
4 x RJ11 6/4 (2 x line, 2 x handset), present on CM-TB8T only
Mains Input
Universal filtered IEC,continuously rated 85-264VAC, 47-63Hz, 25W
Fuse Rating
Anti-surge fuse 2A 20 x 5mm
Equipment Type
CM-TB8
8 channel talkback control unit
CM-TB8T
8 channel talkback control unit with 2 x telephone hybrids
CM-TB8G
8 channel talkback control unit with 2 x GSM lines
Physical
Dimensions (Raw)
Including Connectors
48cm (W) x 34.0cm (D) x 4.2cm (H) (1U)
19” (W) x 13.4” (D) x 1.7” (H) (1U)
Dimensions (Boxed)
57cm (W) x 52cm (D) x15cm (H)
22.4” (W) x 20.5” (D) x 5.9” (H)
Weight
Nett: 5.54kg Gross: 6.5kg
Nett: 12.2lbs Gross: 14.3lbs