Converting A Microphone Signal From High-Impedance Unbalanced To Low-Impedance Balanced; Picking Up A Signal From A Loudspeaker Output - Behringer Ultra-G GI100 User Manual

11 ULTRA-G GI100 User Manual
2.3 Converting a microphone signal from high-impedance
unbalanced to low-impedance balanced
Many inexpensive microphones have unbalanced high-impedance outputs. With the ULTRA-G,
these microphones can be used in spite of long cable runs without the danger of hum or
other interference. Simply insert the GI100 between the microphone and the console. For this
application, you will most likely want to switch the VIRTUAL CAB speaker simulation off.
2.4 Picking up a signal from a loudspeaker output
There are times when picking up a signal after amplifier processing is desirable to achieve a
certain sound, but no direct out is available. Thanks to the GI100's two -20 dB PAD switches,
you can feed a console from the loudspeaker output of an amplifier with a power rating of up
to 3,000 Watts (4 Ohm) without overloading the ULTRA-G. When using a tube amp, be sure to
connect a speaker or other impedance load to the DIRECT LINK output. We recommend using
the VIRTUAL CAB speaker simulation in these applications, when signals from electric guitars
are transmitted.
+ Red or positive post
- Black or negative post
Fig. 2.3: Connection to an amplifier's output
◊ Before connection to a loudspeaker output, always make sure that the GND
LIFT switch is activated (depressed) to prevent accidental short-circuiting of the
amplifier output. The metal casing of the GI100 should not have direct contact with
other equipment. The tip of the output socket should be connected to the positive
(red) loudspeaker pole.