Behringer ULTRA-DI DI20 User Manual page 4

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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 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.
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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 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.
By using the GROUND switch, you can interrupt (LIFT) the
grounding between the input and output. Depending on how
other devices connected to your DI-box are grounded, ground
loops can be eliminated.
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Never connect pin 2 or pin 3 to pin 1! Never remove the
screen protection on pin 1. Otherwise, you won’t be
able to run the DI20 on phantom power (for example,
phantom power from a mixing console).
4
ULTRA-DI DI20
1. CONTROLS