I play through am ART tube channel pre-amp and I have a direct out going into the board/PA. With this setup I am not getting a signal to my poweramp on stage even though it is connected to the other pre-amp out. The pre-amp seems to only allow direct or amp. If I unplug the direct line, I get signal to my power amp again. Is there a way I can have both? Is there some kind of splitter I need to put in to give me two active pre-amp outs?