Behringer ULTRA-DIDI20 User Manual

Users Manual

Version 1.0 October 2002

ENGLISH

ULTRA-DI DI20

www.behringer.com

ULTRA-DI DI20

Welcome to the BEHRINGER family!

Thank you for the confidence you have placed in us by purchasing
the ULTRA-DI DI20 professional active 2-channel DI-box/splitter.

On stage as well as in studios, it is sometimes advantageous to
connect certain sound sources directly to the mixing console. Since
many instruments (keyboards, for example) dont have balanced
outputs they require a DI-box. Sometimes, even guitars cant be
directly connected to mixing consoles because their impedance is
too high.

By using a DI-box, you can directly tap into a high-impedance,
unbalanced signalfor example, a signal between a guitar and a
guitar amplifier. From this point, you can feed this signal directly to a
mixing console.

There are active and passive DI-boxes. A passive DI-box is more
affordable, but its performance is dependent on the impedance of the
device to which it is connected. When the impedance on the mixing
consoles end changes, so does the impedance at the input of the DI­box. Such DI-boxes only function properly when the connected
impedance values are strictly specified (high at the input, low at the
output). Active DI-boxes are not affected by these impedance
considerations. The input impedance of the DI20 is extremely high,
and it absolutely does not influence the signal flow through the DI­box. The output impedance is balanced and always very low, whereby
the signal is far less prone to being affected by noise.

+ To prevent damaging your loudspeakers, first connect

the DI-box and then hook up the respective channel.
The same goes for alternating between battery and
phantom power operating modes.

2

ULTRA-DI DI20

1. CONTROLS

Fig. 1.1: Controls of the DI20

CH. 1 IN input is used to connect unbalanced as well as

balanced signal sources to channel 1.

CH.1 OUT is the balanced output at mic level for channel 1.
CH.2 IN input is used to connect unbalanced as well as

balanced signal sources to channel 2. In LINK mode (see )
this connector functions as output and sends the signal
directly from channel 1.

CH. 2 OUT is the balanced output at mic level for channel 2. In
Link Mode (see ) this connector sends the signal directly

from channel 1.
The ATTENUATION dampening switch 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.

1. CONTROLS

3