Page 1
R
EFERENCE
G
UIDE
www.avensonaudio.com
Austin, Texas
(512) 535-5353
IsoOut
IsoOut
Parallel
Parallel
Input
Input
Parallel
Parallel
IsoOut
IsoOut
XLR
XLR
Output
Output
Grounded
Grounded
Lifted
Lifted
Unity Gain
Unity Gain
FET Buffer
FET Buffer
Instrument
Instrument
Buffer
Buffer
Transformer
DC to DC
DC to DC
Isolated
Isolated
Phantom Power
Phantom Power
1
3
2
4
6
5
1
XLR Output P48 volt phantom power required
2
Switches the IsoOut/Parallel jack between a buffered transformer
isolated output and a parallel or mix input. Isolated is in.
3
Push the switch in to lift the Input ground from the XLR pin 1
4
Input to 10 MΩ FET buffer
6
White LED phantom power indicator
5
Can be mix input / parallel output or the IsoOut based on switch
2
The IsoDI has a transformer isolated power supply to allow a ground lift while still
operating with phantom power. Pin 1 on the XLR is always connected to the
chassis, but can be connected to the Input ground with the XLR switch.
The IsoDI has two modes: Parallel and IsoOut.
Parallel mode: the Input and the Parallel jacks are wired together so that they can
be used as two summed inputs or as an input and a loop out to an amplifier.
IsoOut mode: the IsoOut jack is a transformer isolated output. This isolation can
break ground loops, but also helps to reject noises from being injected into the
input from the amplifier.
O
VERVIEW
Page 2
A
PPLICATIONS
G
UIDE
www.avensonaudio.com
Austin, Texas
(512) 535-5353
Clean Instrument Sound
Two Amplifiers
Noisy Stage Ground
The IsoDI has a high input impedance so that it doesn’t load down passive
instruments. The main signal path is also transformerless to give the ultimate
transparent tone.
Connect instrument to Input
Connect XLR to phantom powered preamp input
Badly wired stages are pretty common. Light dimmer hash and other noises are
coming out of the amp before you even plug into it. The IsoDI’s IsoOut feature
can keep these noises out of the DI feed.
Connect instrument to Input
Connect XLR to phantom powered preamp input
Connect the amp to the IsoOut Jack
Push in the IsoOut/Parallel button
Setting up a couple of amplifiers in the studio can be a great way to test out
different tones, but often just turns into a mess of ground noise. The IsoDI can
help by isolating one amp from the other.
Connect instrument and one amp to the Input with a Y-Cable
Connect XLR to phantom powered preamp input
Connect the other amp to the IsoOut Jack
Push in the IsoOut/Parallel button
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