The GS-CU008 is a popular general purpose mic and headphone interface. Its flexibility has resulted in various custom designs with multiple mic inputs, or multiple monitoring inputs. These options can interface with wireless systems, or be used for audio description.
Inputs
The front panel input is transformer balanced at microphone level with a selectable 48v phantom power switch. A small pot is on the front panel for adjusting gain control, and the mic on/off switch can also be set to act as a cough switch. For optimising the voice input, a band pass filter is used.
Outputs/Talkback
There is a single transformer balanced programme output. The output level is configurable by a three position selector switch which would typically be used with the compressor / limiter active above 0dB. The limiter can also be turned off for a 0dB output. If the compressor / limiter is not required, but more headroom is, the user can select a -10dB output without compressor/limiter.
Monitoring
There is a single audio input with a variable pot for headphone monitoring for a single commentator, with a control for adjusting sidetone level in the headphones. Both pots have left/both/right headphone switching, facilitating adjustment of any input to either side of the headphones. The operator has a single 6.35mm headphone socket. There is a 7 segment LED PPM meter.
Power
Internal switch mode power supply 90-240v AC. An external power input is also provided on a 4 pin XLR 10-18v DC.
MIC INPUT GAIN
-66dBu to -42dBu
MIC + PHANTOM PWR GAIN
-56dBu to -31dBu
EQUIVALENT INPUT NOISE
121dBu (22-22kHz RMS gain @ max) Input terminated with 300 Ohms
PHANTOM POWER
48Volts @ 10mA
MAX INPUT LEVEL (COMPRESSOR OFF)
-41dBu (gain @ 60dB)
MAX INPUT LEVEL (COMPRESSOR ON)
-21dBu (gain @ 60dB)
INPUT LEVEL COMPRESSOR OUTPUT LEVEL
-62dBu -10dBu
-52dBu 0dBu
-42dBu +5dBu
-32dBu +8.5dBu
-22dBu +11dBu
-14dBu +12.5dBu (Just clipping)
THD+NOISE
<0.2% (50Hz to 20kHz)
PPM METER
8 LEDs dB Step between LEDs
PGM & TB OUTPUT IMPEDANCE
50 OHMS Transformer Balanced
CUE & TB INPUT IMPEDANCE
=> 15kOhms Transformer Balanced
HEADPHONE ROUTING
All headphone inputs switchable to either or both ears
HEADPHONE LEVELS MAX
+ 18dBu into 600 Ohms ****Warning high headphone levels can be
harmful to your hearing****
HEADPHONE IMPEDANCE
200 to 2000 OHMS
HEADPHONE CONNECTOR
A or B gauge jack socket
POWER MAINS
100 – 240 Volts 50/60 Hz < 100mA @ 100 Volts IEC Connector
POWER DC
10 – 18 Volts < 200mA @ 10 Volts 4 Pin XLR
POWER ON INDICATOR
Blue LED
OVERALL SIZE
GS-CU008 & GS-CU008A
160 x 222 x 92mm (W x D x H), then add 31mm to the width per
extra TB
UNIT WEIGHT
GS-CU008 = 1.15Kg
GS-CU008A = 1.4Kg
Then add 0.25Kg per extra TB
GS-CU008 Single comms box with no talkback four wires
GS-CU008/A Single comms box with 1 x talkback four wires
GS-CU008/B Single comms box with 2 x talkback four wires
GS-CU008/C Single comms box with 3 talkback four wires
GS-CU008/CIRC (For more than 3 talkbacks) Per addition talkback four wire circuit
MIC ON LOOP A mic on loop output can be specified on any of the versions
GS-CU008/CIRC/V Adds a second PGM output to any version
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