INTRODUCTION
The Radial ProDI is a passive direct box. This means that unlike active direct boxes that either require a battery or power
of some sort to make them work, your ProDI does not need any power at all. It is ‘plug & play’ easy-to-use.
A direct box is primarily used to convert a high impedance instrument signal to a
low impedance balanced mic-level signal, which can then be processed
like a microphone and driven through long cables to the PA without
introducing noise. The ProDI employs a high quality, custom
designed impedance-matching transformer to do the conversion.
Typical applications for the ProDI are connecting electronic
instruments like guitar, bass, keyboard, and drum machines
directly to a PA or recording system. Because the output of
the ProDI matches that of a typical microphone, the ProDI
is perfectly suited for use in live sound and recording studio
systems where microphone signals are put through long
cable systems to a mixing console and where all signals are
balanced to keep noise down.
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Radial Engineering Ltd. ProDI
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User Guide