I installed them this past weekend and it was somewhat successful. I say somewhat, because the Dayton IWS ABDS In-Wall Speaker/Source Switch only worked with the right channel.
I removed it and went with the VRS100 volume control alone for now. That works fine, but it means I can't listen to the kitchen or deck speakers alone.
However, I talked to Parts Express customer service this morning and they are putting a new one in the mail today. If that works fine, I'll be a happy camper and happy with PE.
The Yamahas work fine and do the job asked of them.
I think I lost a couple of pounds of water in that hot attic though....