Operating instructions

CONSOLE
MIC INPUT
(+)
(-)
SHIELD
CASE
GROUND
(+)
(-)
Zin > 1k
ohms
SHIELD GND
150 ohm TYPICAL
MATCHING RESISTOR
MIC
3-3e) MIC LEVEL BALANCED SOURCE OUTPUT TO MIC LEVEL ACTIVE BALANCED CONSOLE INPUT
Most MICs will interface directly to the console‘s high impedance input, however some MICs require a matching resistor to be placed
across the console input to insure proper frequency response and distortion characteristics . Refer to the MIC‘c spec sheet for impedance
matching information. High voltage static discharges can ruin the MIC module‘s input stage. The MIC channel inputs are diode protected
against most static discharges.
(+)
(-)
CONSOLE
LINE INPUT
(+)
(-)
SHIELD
CHASSIS
GROUND
Zin > 10k
ohms
600 ohm
MATCHING RESISTOR
TRANSFORMER
BALANCED
AUDIO
SOURCE
3-3d) LINE LEVEL TRANSFORMER BALANCED SOURCE OUTPUT TO ACTIVE BALANCED CONSOLE
INPUT
The Source Transformer Output wants to see a fixed impedance of generally 600 ohms for it to meet frequency response and distortion
specifications. The Console Input is high impedance (>10,000 ohms). To match impedances, a 600 ohm resistor must be placed
across the input of the console as shown below.
Stereo MICs need to be run through an outboard stereo MIC preamp then brought into the console as a stereo line level signal.
Arrakis Systems, inc. --- 6604 Powell st., Loveland, CO 80538 --- 970-461-0730 --- www.arrakis-systems.com
INSTALLATION PROCEDURES
INPUT WIRING (continued) 3-3)
3.10