kbrkr ... that's great news ... Hopefully with your 'connection' you will be able to plug into the same sound system ... I've seen instances where the opening act uses whatever, and when the headliner comes in the 'good stuff' is turned on ... it's all just to make the 'star' sound that much better ...
I played with a classic rock band a few years back and it was great when we had the opportunity to play through some heavy equipment with a sound guy out front running the show from some huge mixer ...
Good luck, and as they say, "Break a leg" ...

t.