Radial Engineering Ltd.
JDI Stereo™ Direct Box User Guide
3
OVERVIEW
MAKING CONNECTIONS
The Radial JDI is a passive direct box. This means that it does not require any power to make it work. You simply plug in and it
will quietly go to work. Further, as the JDI Stereo employs transformers, these naturally block stray DC voltage that can cause
system noise. This also means that 48V phantom power as used with condenser microphones will not harm the JDI Stereo.
As with all audio gear, always ensure audio system levels are turned down or equipment turned off before making connections.
This will avoid plug-in or turn-on transients from damaging more sensitive components such as tweeters.
There are two channels on the JDI Stereo. These are identical and feature a ¼" INPUT, a ¼" THRU-put and a balanced XLR
out. Connect your source instrument to the input and the balanced XLR out to the PA system or recorder. The THRU connector
provides the means for connecting the instrument to a stage amp or personal monitor system. Simply connect the THRU to your
amp or monitor. Unbalanced cables are much more susceptible to noise than their balanced counterparts. Keeping unbalanced
cables under 8 meters (25') in length is good practice while balanced cables can easily extend 100 meters (300'). The balanced
output of the JDI Stereo is mic level, meaning that it should be connected to the mic input of a mixing console or mic preamp.
Amp
Thru
Thru
Monitors
Sub-Mixer
Input
Using the JDI Stereo with a bass and stage amp
JDI Stereo with a keyboard, mixer and powered speaker
Inputs
Balanced Outs
Balanced Outs
Summary of Contents for JDI
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