However, today they seem to have developed a distortion in the left cup, whenever any moderate bass comes through them, such as the bass in a voice or something. Almost like the cup is blown or something. They seem ok at really low volumes, but it's clearly distorting in that one side when the volume is mid way or above.
Any ideas what the problem could be? Could I really have blown one side through such moderate use? They seemed fine all last night, then this morning it's distorting...?!