I'm sure it would work fine, though I'm sure you will need attenuators of some sort, at least from my limited SBD exp.
The XLRs at the Pour House in Raleigh, NC run hot, and I think the AD20 is hot to begin with, so put the 2 together and you are sizzlin'!!!
I'd do some experimenting at your local music club on off nights, taping crap bands, just to get the experience. That way, when a band that you really want shows up, you know exactly what to do.