That makes sense, Thanks. I could make that happen in my studio but don't have that gear for the field. Crap, this may suck a little worse than I thought it might.
You will want to high pass and limit, you want to assume they don't have an adequate high pass on their system.
Their system could be a grease covered old Bogen amp back in the kitchen or a fancy DSP controlled matrix zone system.
Go check it out ahead of time to see what kind of and where the inputs are located. When I say what kind I mean the connector type, balanced or unbalanced, mic or line level.
Chances are no one there will have a clue.
What extra parts and pieces of equipment do you have laying around?
An old analog crossover could be used for a high pass filter, some EQ's also had/have a variable high pass filter on them.
A very basic DSP would do it all.
You will also want transformer isolation on the audio line between
your system and theirs.
A passive direct box could be used in reverse to get you into an unbalance input and that would give the isolation at the same time.
An inline XLR barrel pad of something around 30db maybe needed if their input your dealing with is mic level.
Let me add, don't worry about micing the drums, an overhead mic will be all you need at the most.
