Hi John,
I don't have the KPC 15s' but I do have the Alesis RA 100 and a Behringer xenyx 802. I'm in agreement with you that these should work just fine. However, I have had some noise problems with the 802. Mine seems to be highly susceptible to any sort of wiring problems, light dimmers, interference, etc. and gain staging is very critical. I don't know how much you've used yours already, but if you haven't tried it all that much, you might want to test it in several different places if you can. Good luck on the gig scene. I'm sure you'll find something.

Jim


I'd be completely happy if I had just one more guitar.