The ADI-2 can be used to connect the unbalanced output of an instrument or line level device (eg. guitar, bass, synthesizer, effects module, another mixer) to the balanced input of a mixer or amplifier. Set the GUITAR/SPEAKER (3) switch to GUITAR for this application. If you desire to send the original unbalanced signal on to a mixer or amplifier, use the 1/4" unbalanced output (5). The 1/4" output (5) is paralleled with the input, therefore, when using the 1/4" output (5), the input device and output device volume controls may need to be adjusted to acquire the desired level.