I recently bought a house and trying to get it figured out. The previous homeowners had a Sonos Amp connecting 3 sets of speakers in the house and worked with no issue. I bought the same amp but I can only get one pair to work regardless of wiring combo. Coming out of the ceiling, I have a set of 3 red wires, a set of 3 black wires, a set of 3 green, and finally a set of 3 white wires. When I go in the attic, all three sets of speakers are using black and red wiring so I am lost on how to troubleshoot the cabling and what it should look like.
Best answer by Gh79
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