Ok I have an older Crate BX-25 combo amp. beside the headphone output there is one that has a little speaker with a note coming out of it.... now would I beable to run a cable from that to my mixer? Or is that not an output? I honesly have no idea what it is for. I wouldnt want to buy a soundcard and mixer just to find out I need a new amp for direct input too haha.