Thanks mirza and praisethelord.
I was just hoping it would work, and not be a too "heavy" signal. whatever, just wanted to make sure.

Also, on the pa3x, is there a button to turn mic on and off? if yes, will that setting have to be reset every time? also,
I am using this NOT for singing (mainly) but for SPEECHES, at an event, where I play. I just don't currently have a mixer, and plug the keyboards outs straight to the pa speakers.