8

ULTRA-DI DI20

(8) 

By using the 

GROUND

 switch, you can 

interrupt (LIFT) the grounding between 

the input and output. Depending on 

how other devices connected to your 

DI-box are grounded, ground loops can 

be eliminated.

◊ 

Never connect pin 2 or pin 3 to pin 1! 

Never remove the screen protection 

on pin 1. Otherwise, you won’t be able 

to run the DI20 on phantom power 

(for example, phantom power from a 

mixing console).

Battery compartment

To access the battery compartment, 

loosen the screw on the rear.

3.  Connection Options

3.1  Connecting a (bass) guitar

In

Out

Link Out

ULTRA-DI DI20

EURORACK

UB2222FX-PRO

Fig. 3.1: Guitar 

➠

 DI-box 

➠

 guitar amp/mixing console

This illustration shows the standard 

application of a DI-box. The signal is fed 

unbalanced to a guitar amp and balanced to a 

mixing console (LINK mode). This application 

has advantages when used with bass guitars, 

because very few microphones are able to 

pick up low frequencies at high levels.