Someone wanted to sell me a P10 and he is frank enough to tell me that his P10 has an audible clicking sound intermittently. His set was bought in 2013 and according to him, he has brought it back to the dealer and they were unable to find out the problem. According to him, the dealer, and apparently PS Audio in US claimed that the clicking sound is caused by expanding metal/casing in the P10 and there is nothing wrong with his set. What do you guys think? Does your P10 has a clicking sound?