I had an Audio Refinement Complete, remote controlled and it developed a really annoying buzz after not even having been used much. It turned on and then suddenly, shut down. I sent the piece to the distributor and they thought that I was abusing the integrated with a heavy load...My suspicion, the integrated was in a sort of cold room and I think with the heavy metallized case and components, it could have developed some moisture along with the voltage that ran through it, it made it fail.
Without any physical shock, things can go out of wire. Especially when you have items going one extreme temperature to another, you might have unusual things happen, such as what happend to me.
Since I have avoided the Audio Refinements and other YBAs like the plague.