To connect the VT50FX directly into a mixer, use the LINE OUT/PHONES jack. This can be used either for headphones or for a mixing console. When a cable is plugged into this port, the internal speaker is muted and an internal speaker simulation is applied to the signal. To plug into a mixer, use a 1/4" TS cable. Plug one end into the LINE OUT/PHONES jack of the VT50FX and the other end into a line input of the mixer. If hum problems occur, insert a DI box like the BEHRINGER DI100 or DI20.