From my understanding this is a known issue with the igroove unit as a I've seen a number of posts from people asking about a fix. My igroove is also out of the warranty period so I decided to take it apart and see what I could find out. After a full tear down and rebuild (including reseating all connections and having a good look at both control boards) I was unable to locate the problem. I did however, notice that at all the points I checked on the boards as well as the speaker connections themselves, there was a consistent voltage of about 50 volts running through everything. This seemed strange to me although not having any reference values to work with I don't know if that's normal or not. I'm going to try and call the tech line today and see if anyone there can help. Would it be possible to get some benchmark values and test points so I could properly analyze the system?