In my case, the speakers are currently run separately to each room to 5-way posts behind the entertainment center. I was thinking 4 because since they are separately controlled now, wouldn't I need a relay for each if I was not to chain them back together again for the Elk?
Assuming I get that part straightened out, do I need to worry about power coming out of the Elk (is there an amp to add?)? I probably would be connecting 3 pairs of in wall 6 inch speakers, an Elk-73 or two, and then possibly something in the living room.
If this all works, it also I think paves the way for PC based multi-zone outputs (currently it is Harmon Kardon controlled, but I like the M-Audio and JRMC combinations that have been touted here and it offers true multi-zone).