I am having a serious problem in the AMP's aux analog input line. There is a delay of about 2 seconds between input and output. Two months ago I opened a report for this problem, and after a very long discussion that even resulted in legal action, Sonos changed the AMP to solve the problem. Today I got a new AMP that has the same problem. I have seen in the Sonos forum that there are others who have the same case. Sonos replies that the amplifier was not designed for that input line! So what is the aux line for? How come replacing it has been resolved? How come the other AMPs in my house work? I think the weak side of Sonos is proving ……