This is probably a really dumb question, so please be patient with me. I have a really great sounding tube amp with no line out. Playing in church is problematic w/o messing with a mic on the cab. Was wondering if I bought something like an RP355, could I run the line out from the RP355 to the PA, and still have my amp/speaker output on stage as a monitor? And if so, would I be hearing the same output as what is going to the PA? Thanks!