Soundhound,

Thanks for the info. Since the resulting line would be unbalanced anyway, and the run is less than 20" to the rear speakers, and the sockets on the back of the Mackie 824s are combination xlr/1/4" phones, I'm going to run male RCA to male 1/4" phone plug. BTW, I do understand that a simple electric guitar wire will not do. I have some dedicated, shielded speaker wire that should work well. (I'm in the NE Ohio area.)

Thanks, again. Can you think of anything else I should consider?

Jay