A lot is going to depend on what Mastering settings you use on the G70, cassp...

Me, I'd set it up at home (isn't the whole POINT of the Bose, that you get the same sound regardless of the room it is in?) and play a sequence through it, stand back at about the audience distance, and adjust it from there...
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An arranger is just a tool. What matters is what you build with it..!