On October 22, 2016 at 16:38, tweeterguy said...
If all 6 zones tone out from the head end, there is something stashed somewhere else. As noted look for a bundle of taped up wire nuts in the wall or maybe one of these tucked away in a cabinet, attic, or wall cavity:
[Link: nilesaudio.com]Those were all the rage in the 90's-early 2000's
That's exactly the piece I was looking for when we saw one pair of wires! Good memory.