Direct Injection Box for Recording & PA


Posted on Nov 10, 2012

A Direct Injection (or DI) box is a very handy piece of equipment for any public address rig or recording studio, whether for band or general use. It will allow you to connect the output from guitar amps, keyboard mixers, tape machines and just about anything else directly to the mixer, without using a microphone, and with no hum loops.


Direct Injection Box for Recording & PA
Click here to download the full size of the above Circuit.

The unit described will convert unbalanced inputs (such as from a guitar or bass amp) to balanced, allows the level to be set to something reasonable, and comes in two flavours. There is a completely passive version that uses a transformer to create the b




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