T1 ToneMatch® Audio Engine / Preamp Out
The output of any of the Channels 1, 2, 3 individually to the Preamp Outs (directly below the inputs for Channels 1,2,3.
Note - these outputs are post-trim. That is, only the individual Channel trim controls affect these outputs. The output does not include any T1 ToneMatch Audio Engine processing like Presets, EQ, or effects. The individual volume controls and mute buttons have no effect on the Preamp Outputs.
The primary application would be to send dry (non-processed) copies of the inputs directly to separate mixing console or multi-channel recording device.