Technically, yes, the CD input of the VT100FX can be used as a direct output. This signal can then be sent, for example, into a channel on a mixer for a direct feed from the amp. The signal sent to the mixer from the amp is only affected by the gain knob in the clean channel and the gain and volume knobs in the overdrive channel. The master volume knob does not affect the signal to the mixer out of the CD input jack, meaning you can control the master level of the amp on stage independently from the signal that is being to the house mixer.