Behringer ULTRA-DI DI20 User Manual page 7

7
ULTRA-DI DI20
CH. 1 IN input is used to connect
(1)
unbalanced as well as balanced signal
sources to channel 1.
CH.1 OUT is the balanced output at mic
(2)
level for channel 1.
CH.2 IN input is used to connect
(3)
unbalanced as well as balanced signal
sources to channel 2. In Link mode
(see (6)) this connector functions as
output and sends the signal
directly from channel 1.
CH. 2 OUT is the balanced output at
(4)
mic level for channel 2. In Link Mode
(see (6)) this connector sends the signal
directly from channel 1.
The ATTENUATION dampening switch
(5)
considerably increases the useful
operating range of the DI20 from low
signal levels of a high-impendence
microphone or a guitar, all the way
to the speaker connectors of a guitar
amplifier (solid state). You can
select between 20 and 40 dB worth
of attenuation.
◊
You should only use the ATTENUATION
switch when your DI20 rather than
the mixing console preamp begins
distorting. Otherwise refrain
from using this function to avoid
excessive dampening.
The MODE switch lets you select the
(6)
operating modes of the DI20. In the
2-CH mode, two independent signals
can be connected to channels 1 and 2
respectively. In LINK mode the DI-box
functions as a splitter: One signal can
be fed to the channel 1 input and split
into two balanced signals (at outputs
1 and 2) and an unbalanced signal
at CH.1 OUT. The un-balanced signal
can, for example, be connected to an
additional amplifier.
◊
When connecting a tube amplifier
to the input of the DI20, please keep
in mind that an appropriate load
resistance (e. g. a loudspeaker)
must be connected to the CH.1 OUT
(LINK MODE) connector.
The BATTERY switch activates the
(7)
battery powered mode. Set the battery
operating mode to OFF when your
DI20 is connected to phantom power.
While setting it to OFF, brief whistling
noise may occur. This is completely
normal and needs no further attention.
However, you should not change the
battery switch when you have an amp
connected. For battery operation,
you'll only need a commercial 9 V
battery of the 6LR61 type.