I'm using the POD XT Pro for live use. I run the unbalanced out to a power amp and cabinet for stage volume I run the balanced out to the PA I want the cab sims ON for the PA and cab sims OFF for my power amp into a guitar cab- is this possible?? I'm using "Stack Power Amp" and the cabs are ON from the unbalanced out into my power amp - i thought they would be off? How should i set it up to use cab models for PA but no cab model for my power amp into guitar cab?