Using the DI-PLUS 2
The DI-PLUS 2 is a Direct Injection,
or Direct, box. It is a self contained,
stand alone stereo unit designed to
interface a left and right pair of un-
balanced high impedance lines with
professional balanced low imped-
ance inputs. In other words, it will
convert ordinary signals into ones
that are happy to travel down a long
line and meet a mixing console at the
other end. It has many applications
for Live Sound, Studio or Broadcast
use.
Typical uses are:
• Musical instruments - Keyboards,
synthesizers, electronic drums, drum
machines
• Consumer audio products - CD
players, cassette decks, tape decks,
video cassette audio, computers.
Operating instructions
Power Requirements
The DI-PLUS 2 is an active device,
ie.
it needs power to run. This power
can be supplied 2 ways:
• Battery power.
The DI-PLUS 2 has provision for 1 x
9 volt battery internally. To get to the
battery compartment, unscrew the
knurled knurled captive bolt on the
rear panel, and push the top part of
the chassis upwards. The battery
compartment will immediately be
visible. Remove the old battery, re-
place with a new 9v alkaline battery
and close the lid. Re-tighten the bolt
finger tight only.
To obtain warranty service for your DI-
PLUS 2
, call or write
to ARX or the dealer you purchased it from. They will give
you the correct address to send your unit to. Have your sales
receipt showing date of purchase handy, and include a copy
of it with your DI-
PLUS 2
. Pack the unit well - we are not
responsible for damage caused by unsuitable packing during
shipment. Send the unit to us pre-paid, by a delivery service
like FedEx, UPS, or any other service that can track the ship-
ment. We will return it to you freight paid.
If you have any questions, or any part of this is unclear, please
write to ARX Systems in the country of purchase, or to the
address below.
PO Box 15,Moorabbin, Victoria 3189, Australia.
Phone: +61 (0)3 9555 7859 Fax: +61 (0)3 9555 6747
You can also Email the factory at:
Page 7
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Page 4
Page 5
ARX Systems (ARX) warrants to the first purchaser of this DI-PLUS
2 that it is free from defects in materials and workmanship under
normal use and service. ARX’s sole obligation under this warranty
shall be to provide, without charge, parts and labour necessary to
remedy defects, if any, which appear within twelve (12) months from
date of purchase; and to supply parts only for the life of the product
to the original purchaser.
This is our sole warranty. It does not cover finish or appearance items,
nor does it apply if the DI-PLUS 2 has been, in ARX’s sole judgement:
• Subjected to misuse, abuse, negligence or accident;
• Repaired, worked on, or altered by persons not authorized by ARX,
• Connected, installed, adjusted or used otherwise than in accord-
ance with the instructions supplied by ARX.
This warranty gives you and us specific legal rights, and you may also
have other rights which can vary from state to state.
INTERNATIONAL LIFETIME WARRANTY
Max Input Level
+12 dB Phantom powered
+6 dB Battery powered
Input Impedance
1 Meg Ohm
Max Output Level
+17 dB 10K Ohm load Phantom powered
+12 dB 10K Ohm load Battery powered
+11 dB 600 Ohm load Phantom powered
+12 dB 600 Ohm load Battery powered
Output Impedance
680 Ohms Balanced
Output Signal to Noise
-100 dB unweighted
-104 dB A weighted
Dynamic Range
117 dB 10K Ohm load Phantom powered
112 dB 10K Ohm load Battery powered
111 dB 600 Ohm load Phantom powered
107.5 dB 600 Ohm load Battery powered
Distortion
100 Hz .0018%
1KHz
.0028%
10KHz .0056%
Frequency Response
20Hz to 20KHz, ± 0.2 dB
Gain through Unit
6dB (Pad switch out)
Pad Switch
Global -20 dB attenuation
Input and Loop Out Connectors
Insulated jack
Output Connectors
3 pin XLR. Wired Pin 1 Ground, Pin 2 +Hot, Pin 3 -
Cold. Global Audio Ground (Pin 1) lift switch
Construction
All-steel chassis, fibreglass PCB
Battery Access
Twist connector opens chassis, snap-in
battery holder inside. No tools required
channel to the amplifier. Pushing the
Pad switch IN will reduce both input
levels by -20dB if required.
Note:
If you are only using
One
channel of the DI-
PLUS 2
, make sure
that you use Channel A. The
Channel A Input jack switches the
DI-
PLUS 2
on.
Special Note. The DI-PLUS 2 is a Line
level device, so it is not designed to
accept Microphone level signals.
Output Connections
Connect a balanced microphone
lead from each 3 pin XLR connector
on the rear of the DI-
PLUS 2
to a
pair of input channels on the mixing
console. Pan the channels Left or
Right as required.
Pushing the Audio Ground Lift
switch IN will isolate both Pin 1
outputs of the DI-
PLUS 2
to stop
Ground Loops if required.
Specifications
As well as the DI Plus and the DI Plus2,
ARX manufacture a six channel rack
mount AC powered Direct box:
The
DI-6s
is a 19” 1 RU AC powered
unit that has 6 independent Direct boxes,
each with high impedance Input and Loop
out jack connectors, a oo to +15dB level
control, clip LED, balanced XLR output
and individual audio ground lift switches.
It can also function as a 6 into 1 line mixer
at the same time
.
A switch on the rear changes it from a 6
into 1 mixer to a 1 into 6 line distribution
splitter, each split’s level controlled by the
six individual channel controls.
A true Pro Audio toolbox!
Did you know...
1
2
3
Input Connections
A stereo high impedance source
(instrument, unbalanced lines or
similar) plugs into Inputs A and B
(typically Left to A and Right to B).
If the signal needs monitoring, eg.
an onstage amplifier, then connect
a lead from the Loop Outs of each
That’s all there is to it. No tools, no
screwdrivers required!
•
Phantom power.
The DI-PLUS 2 will also run on Phan-
tom power if available on the mix-
ing console. Switch the Phantom
power ON on the channel the DI-
PLUS 2 is plugged into, and the Red
Phantom power LED will light up on
the DI-PLUS 2. This means the DI-
PLUS 2 is now running on the Phan-
tom power and the batteries are dis-
engaged. If you switch the Phantom
power off the DI-PLUS 2 will revert
to battery operation, although we
recommend using Phantom Power if
available as it gives an approx 6dB in-
crease in overall headroom
(see
Specifications, p 4).
