A few days ago, I accidentally damaged one of the speakers of an audio system (Edifier S730), most probably because of a loud and high-pitched distortion (noise?) that happened when the system was connected or disconnected from my computer while turned on.
The sound is difficult to describe, but one knowledgeable person I asked replied that it was a full volume DC offset spike. Is this the actual technical term? If so (or not) is there a way to prevent it in the future (besides being really, really, careful?) Electrical problem? The set was directly connected to a wall socket. However, the other is full of power bars connected to a computer, two routers, three monitors, and an external HDD.