Well I finally heard from Ayre, through my dealer, on Tuesday the query was "is it something I have connected to the amps, some non-Ayre component, like a Creston"... what ever that is?
I replied that the problem is present with nothing connected to the amps. In fact tonight I did a test by swapping the outputs from the KXR preamp to the power amps and again the same amp failed after a few minutes, so clearly it is a problem with that amp.
I hope someone contacts me with a solution soon. I am really not happy.
The 15 minutes I did get to listen was very good...Eva Cassidy
Don't be too hard on aardvark...I am currently not experiencing the exemplary service you all seem to have received.