What is a DI?
Direct boxes are often referred to as "DI"
This stands for "Direct Injection" as their main purpose is to convert
unbalanced and/or high impedance instrument signals into a format
suitable for direct connection to a mixing console - without the use of a
In 1981, Whirlwind developed and produced the first commercially available Direct Box in the audio industry.
A Direct Box can be in-DI-spensible.
A DI performs several functions:
It converts a
high impedance signal to a low impedance
signal (although it will also accept a low impedance signal from a preamp,
keyboard, active pickup or other electronic device).
It converts an
unbalanced signal to balanced.
It reduces a strong instrument or line level signal (and sometimes even
speaker level signal) to a mic level signal suitable for connection to the mic
input of a mixing console.
It isolates electronic equipment on stage from the mixing console, which can
help eliminate interference
and noise caused by DC interaction or ground loops.
Read more about DIs in our tech article:
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