Direct Box – Active Circuit

This is a simple active Direct Inject Box with some very nice features.  It is similar to The active box featured in the Boscorelli Book The Stompbox Cookbook.  The circuit has a charge pump in order to provide more headroom for the initial signal and outputs the signals to the XLR format jack..  It also features a Gain control, Polarity switch and Ground lift.  If built in a metal enclosure (recommended)  you should use a XLR jack with a plastic casing so that the ground lift to work properly.

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