Does anyone know what the foam material is that is used behind the speakers and in from of them? Mine just disintegrated and turned into dust. I'd like to get some of this material and use it to refurbish my H10-40, provide the audio feedback stops. It could be some of the disintegrated foam was causing an issue. There is not much in there that could cause a problem. It is just wires a a capacitor.
The capacitor on the microphone leads could be the issue too. Does anybody happen to know what value it is? It is covered in such a way that I can't read any markings.
