3 OPERATION
16
3 . 1 M I C R O P H O N E S
The Eureka works great with all types of microphones including dynamic, ribbon and
condenser microphones. Dynamic microphones and ribbon microphones are
generally lower output devices and require no external power source. Condenser
microphones are generally more sensitive than dynamic and ribbon microphones and
typically require external 48V phantom power.
Microphone Input Impedance
You can adjust the input impedance on the Eureka to match or “tune” a particular
microphone to achieve a desired sound. Most microphone preamplifiers have a fixed
microphone input impedance of 1000 to 2000 ohms. The Eureka has five different
impedance values to select from: 50, 150, 600, 1500 and 2500.
Refer to your microphone specifications to find the microphone output impedance and
experiment with matching the Eureka’s input impedance with the microphone’s output
impedance. As the impedance on the Eureka is lowered, a resistive load is put on
the microphone. This will not damage a microphone. However lowering or raising the
impedance can create subtle coloring and filtering effects and can be a perfect
solution for a particular application.
3 . 2 S E N D A N D R E T U R N
The EUREKA features ¼” TRS balanced
Send
and
Return
jacks. These connectors
allow the use of external processors such as reverbs, de-essers, limiters, EQ’s, etc.
Simply connect the send jack, balanced or unbalanced to the input of the external
processor. Then connect the EUREKA’s return jack to the output of the external
