Using the DI-PLUS 2
TheDI-PLUS2isaDirectInjection,
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
thatarehappytotravel downalong
lineandmeetamixingconsoleatthe
other end. It has many applications
for Live Sound, Studio or Broadcast
use.
Typical uses are:
• Musical instruments - Keyboards,
synthesizers,electronicdrums,drum
machines
• Consumer audio products - CD
players, cassette decks, tape decks,
videocassette audio, computers.
Operating instructions
Power Requirements
The DI-PLUS 2 is an active device,
ie.itneedspowertorun.Thispower
canbe supplied 2 ways:
• Battery power.
TheDI-PLUS2hasprovisionfor 1x
9voltbatteryinternally.Togettothe
batterycompartment, unscrew the
knurled knurled captive bolt on the
rearpanel, and push the top partof
the chassis upwards. The battery
compartment will immediately be
visible. Remove the old battery, re-
placewith anew 9v alkalinebattery
andclosethe lid.Re-tightenthebolt
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
youthecorrectaddresstosendyourunitto. Haveyoursales
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 fordamagecaused byunsuitable packingduring
shipment.Sendtheunittouspre-paid,byadeliveryservice
likeFedEx,UPS, orany otherservicethatcantracktheship-
ment. We will return it to you freight paid.
Ifyouhaveanyquestions,oranypart ofthisisunclear,please
write to ARX Systems in the country of purchase, or to the
addressbelow.
PO Box 15,Moorabbin, Victoria 3189, Australia.
Phone: +61 (0)3 9555 7859 Fax: +61 (0)3 9555 6747
Page 7Page 6
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
remedydefects,if any,whichappearwithintwelve (12)months from
date of purchase; and to supply parts only for the life of the product
to the original purchaser.
Thisisoursole warranty.Itdoesnotcoverfinishorappearanceitems,
nordoesit applyif theDI-PLUS2 hasbeen, inARX’ssolejudgement:
•Subjectedtomisuse,abuse,negligenceoraccident;
• Repaired,workedon,oralteredbypersonsnotauthorizedbyARX,
• Connected, installed, adjusted or used otherwise than in accord-
ance with the instructions supplied by ARX.
Thiswarrantygives you and us specific legal rights, andyoumay 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
680OhmsBalanced
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-20dBattenuation
Input and Loop Out Connectors
Insulatedjack
Output Connectors
3 pin XLR. Wired Pin 1 Ground, Pin 2 +Hot, Pin 3 -
Cold. Global Audio Ground (Pin 1) lift switch
Construction
All-steelchassis, fibreglass PCB
Battery Access
Twistconnector openschassis, snap-in
batteryholder 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
channelofthe DI-PLUS2,make sure
that you use Channel A. The
Channel A Input jack switches the
DI-PLUS2on.
SpecialNote.The DI-PLUS2isaLine
level device, so it is not designed to
accept Microphone level signals.
Output Connections
Connecta 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
Rightasrequired.
Pushing the Audio Ground Lift
switch IN will isolate both Pin 1
outputs of the DI-PLUS 2 to stop
GroundLoopsifrequired.
Specifications
As well as the DI Plus and the DI Plus2,
ARX manufacture a six channel rack
mountACpowered Directbox:
The DI-6s is a 19” 1 RU AC powered
unitthathas6 independentDirectboxes,
eachwithhighimpedanceInputandLoop
outjackconnectors, aooto+15dBlevel
control, clip LED, balanced XLR output
andindividualaudioground liftswitches.
Itcanalsofunctionasa 6into1linemixer
at the same time.
A switch on the rear changes it from a 6
into1mixertoa1 into6 linedistribution
splitter,eachsplit’slevelcontrolledbythe
sixindividualchannel controls.
Atrue ProAudiotoolbox!
Did you know...
1
2
3
Input Connections
A stereo high impedance source
(instrument,unbalancedlines or
similar)plugsintoInputs A and B
(typically Left to A and Right to B).
Ifthe signal needs monitoring, eg.
anonstageamplifier,then connect
a lead from the Loop Outs of each
That’s all there is to it. No tools, no
screwdriversrequired!
•Phantom power.
TheDI-PLUS2willalsorunonPhan-
tom power if available on the mix-
ing console. Switch the Phantom
power ON on the channel the DI-
PLUS2 is plugged into, and the Red
PhantompowerLEDwilllightupon
the DI-PLUS 2. This means the DI-
PLUS 2 is now running on the Phan-
tompower and the batteries aredis-
engaged. If you switch the Phantom
power off the DI-PLUS 2 will revert
to battery operation, although we
recommendusing Phantom Powerif
availableas it gives an approx 6dB in-
crease in overall headroom (see
Specifications, p 4).
