Behringer DI20 User manual

ULTRA-DI DI20
Professional Active 2-Channel DI-Box/Splitter
User Manual

2ULTRA-DI DI20
Table of Contents
Thank you ............................................................................................................... 2
Warranty ................................................................................................................. 3
Legal Disclaimer .................................................................................................... 4
Limited warranty ................................................................................................... 5
1. Welcome to the BEHRINGER Family!............................................................... 6
2. Controls.............................................................................................................. 6
3. Connection Options.......................................................................................... 8
3.1 Connecting a (bass)guitar..............................................................................................8
3.2 Converting output signals of a keyboard, DJ-mixer, etc......................................... 9
4. Audio Connections ........................................................................................... 9
5. Multilingual Documentation..........................................................................11
6. Specications...................................................................................................11
Thank you
Thank you for the condence you have placed in us
by purchasing the ULTRA-DI DI20 professional active
2-channel DI-box/splitter.

3ULTRA-DI DI20
Warranty
Terminals marked with this symbol carry
electrical current of sucient magnitude
to constitute risk of electric shock. Use only
high-quality professional speaker cables with
¼" TS or twist-locking plugs pre-installed.
Allother installation or modication should be
performed only by qualiedpersonnel.
This symbol, wherever it appears,
alertsyou to the presence of
uninsulated dangerous voltage
inside the enclosure-voltage that may be
sucient to constitute a risk ofshock.
This symbol, wherever it appears,
alertsyou to important operating
and maintenance instructions in
the accompanying literature. Please read
themanual.
Caution
To reduce the risk of electric shock,
donot remove the top cover
(orthe rear section). No user serviceable parts
inside. Refer servicing to qualied personnel.
Caution
To reduce the risk of re or
electric shock, do not expose this
appliance to rain and moisture. The apparatus
shall not be exposed to dripping or splashing
liquids and no objects lled with liquids,
suchas vases, shall be placed on the apparatus.
Caution
These service instructions are
for use by qualied service
personnel only. Toreduce the risk of electric
shock do not perform any servicing other than
that contained in the operation instructions.
Repairs have to be performed by qualied
servicepersonnel.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation
openings. Install in accordance with the
manufacturer’sinstructions.
8. Do not install near any heat sources
such as radiators, heat registers, stoves,
orother apparatus (including ampliers)
thatproduceheat.

4ULTRA-DI DI20
9. Do not defeat the safety purpose of the
polarized or grounding-type plug. A polarized
plug has two blades with one wider than the
other. A grounding-type plug has two blades
and a third grounding prong. The wide blade
or the third prong are provided for your safety.
Ifthe provided plug does not t into your
outlet, consult an electrician for replacement of
the obsolete outlet.
10. Protect the power cord from being
walked on or pinched particularly at plugs,
convenience receptacles, and the point where
they exit from the apparatus.
11. Use only attachments/accessories
specied by themanufacturer.
12. Use only with the
cart, stand, tripod, bracket,
or table specied by the
manufacturer, orsold with
the apparatus. When a cart
is used, use caution when
moving the cart/apparatus combination to
avoid injury from tip-over.
13. Unplug this apparatus during lightning
storms or when unused for long periods
oftime.
14. Refer all servicing to qualied service
personnel. Servicing is required when the
apparatus has been damaged in any way,
suchas power supply cord or plug is damaged,
liquid has been spilled or objects have fallen
into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate
normally, orhas beendropped.
15. The apparatus shall be connected to a
MAINS socket outlet with a protective
earthingconnection.
16. Where the
MAINS plug or an
appliance coupler is used
as the disconnect device,
thedisconnect device shall
remain readilyoperable.
TECHNICAL SPECIFICATIONS AND
APPEARANCES ARE SUBJECT TO CHANGE
WITHOUT NOTICE AND ACCURACY IS NOT
GUARANTEED. BEHRINGER, KLARKTEKNIK,
MIDAS, BUGERA, AND TURBOSOUND
AREPART OF THE MUSIC GROUP
ALL TRADEMARKS
ARE THE PROPERTY OF THEIR RESPECTIVE
OWNERS. MUSICGROUP ACCEPTS NO
LIABILITY FOR ANY LOSS WHICH MAY BE
SUFFERED BY ANY PERSON WHO RELIES
EITHER WHOLLY OR IN PART UPON ANY
DESCRIPTION, PHOTOGRAPH OR STATEMENT
CONTAINED HEREIN. COLORS AND
SPECIFICATIONS MAY VARYFROM ACTUAL
PRODUCT. MUSIC GROUP PRODUCTS ARE
SOLD THROUGH AUTHORIZEDFULLFILLERS
AND RESELLERS ONLY. FULLFILLERSAND
RESELLERS ARE NOT AGENTS OF
MUSICGROUP AND HAVE ABSOLUTELY
NO AUTHORITY TO BIND MUSICGROUP BY
LEGAL DISCLAIMER

5ULTRA-DI DI20
ANY EXPRESS OR IMPLIED UNDERTAKING
OR REPRESENTATION. THIS MANUAL IS
COPYRIGHTED. NO PART OF THIS MANUAL
MAY BE REPRODUCED OR TRANSMITTED IN
ANY FORM OR BY ANY MEANS, ELECTRONIC
OR MECHANICAL, INCLUDING PHOTOCOPYING
AND RECORDING OF ANY KIND, FOR ANY
PURPOSE, WITHOUT THE EXPRESS WRITTEN
PERMISSION OF MUSICGROUPIPLTD.
ALL RIGHTS RESERVED.
© 2013 MUSICGroupIPLtd.
Trident Chambers, Wickhams Cay,
P.O. Box 146, Road Town, Tortola,
BritishVirgin Islands
For the applicable warranty terms and
conditions and additional information
regarding MUSIC Group’s Limited Warranty,
please see complete details online at
LIMITED WARRANTY

6ULTRA-DI DI20
1. Welcome to the
BEHRINGER Family!
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 amplier. 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 aordable, 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 DI-box.
Such DI-boxes only function properly when
the connected impedance values are strictly
specied (high at the input, low at the output).
Active DI-boxes are not aected by these
impedance considerations. The input impedance
of the DI20 is extremely high, and it absolutely
does not inuence the signal ow through the
DI-box. The output impedance is balanced and
always very low, whereby the signal is far less
prone to being aected 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. Controls
N11999
®
Fig. 2.1: Controls of the DI20

7ULTRA-DI DI20
(1) CH. 1 IN input is used to connect
unbalanced as well as balanced signal
sources to channel 1.
(2) CH.1 OUT is the balanced output at mic
level for channel 1.
(3) CH.2 IN input is used to connect
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.
(4) CH. 2 OUT is the balanced output at
mic level for channel 2. In Link Mode
(see(6)) this connector sends the signal
directly from channel 1.
(5) 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
amplier (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.
(6) 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 amplier.
◊ 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.
(7) 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.

8ULTRA-DI DI20
(8) 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.
◊ 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).
Battery compartment
To access the battery compartment,
loosenthe screw on the rear.
3. Connection Options
3.1 Connecting a (bass)guitar
In
Out
Link Out
ULTRA-DI DI20
EURORACK
UB2222FX-PRO
Fig. 3.1: Guitar ➠DI-box ➠guitar amp/mixing console
This illustration shows the standard
application of a DI-box. The signal is fed
unbalanced to a guitar amp and balanced to a
mixing console (LINK mode). This application
has advantages when used with bass guitars,
because very few microphones are able to
pick up low frequencies at high levels.

9ULTRA-DI DI20
3.2 Converting output signals of
a keyboard, DJ-mixer, etc.
ULTRA-DI
DI20
Mic In
PRO MIXER
VMX200
L
R
In
In
Out
Out
EURORACK UB2222FX-PRO
Fig. 3.2: DJ-mixer ➠DI-box ➠mixing console
This conguration is recommended when
using a DJ-mixer or another signal source,
which sends an unbalanced line level signal.
In addition, if you need a separate monitor
signal, the line level signal can be sent to
another amplier.
4. Audio Connections
The BEHRINGER ULTRA-DI DI20 features
electronically servo-balanced standard inputs
and outputs. The circuit design is equipped
with automatic hum suppression for balanced
signals and operates problem-free even at
high levels. Externally induced mains hum
is thus eciently suppressed. The servo
function automatically detects unbalanced
pin connections and changes the nominal
level internally by 6 dB so that there is
no dierence in level between input and
outputsignals.
For unbalanced use, pin 1 and pin 3
have to be bridged
1 = ground/shield
2 = hot (+ve)
3 = cold (-ve)
input
12
3
output
12
3
Balanced use with XLR connectors
Fig. 4.1: XLR connectors

10 ULTRA-DI DI20
strain relief clamp
sleeve
tip
sleeve
(ground/shield)
Unbalanced ¼" TS connector
tip
(signal)
Fig. 4.2: ¼" TS connector
strain relief clamp
sleeve
ring
tip
sleeve
ground/shield
For connection of balanced and
unbalanced plugs, ring and sleeve
have to be bridged at the stereo plug.
Balanced ¼" TRS connector
ring
cold (-ve)
tip
hot (+ve)
Fig. 4.3: ¼" TRS connector

11 ULTRA-DI DI20
5. Multilingual Documentation
6. Specications
Frequency response 10 Hz to 70 kHz (-3 dB)
Noise 100 dBu
Distortion < 0.014% (1 kHz, 0 dBu in)
Input resistance > 250 kΩ
Connection impedance > 600 Ω
Input ¼" mono jack
Output XLR balanced
Max. input level +12/+32/+52 dBu
Phantom power 18 V DC to 48 V DC
Battery power 9 V 6LR91
Dimensions approx. 6 x 5 x 2 ⁄"
approx. 150 x 130 x 60 mm
Weight approx. 240 g
BEHRINGER is constantly striving to maintain the highest professional standards. As a result of these efforts, modifications may be made from
time to time to existing products without prior notice. Specifications and appearance may therefore differ from those listed or shown.
◊ The following versions of this user’s
manual can be downloaded free
of charge at
German, French, Spanish, Italian,
Dutch, Finnish, Swedish, Danish,
Portuguese and Greek.

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