Wayne Parham Messages: 18831 Registered: January 2001
Illuminati (33rd Degree)
Maybe you're on to something. All machines have a life-span, and all can be damaged. Loudspeakers are constantly moving when in use, and some parts are prone to wear out after time. The surround will eventually fatigue from steady use, even if the device is never used beyond its operating limits. So you might want to check them to see if they have been damaged or fatigued.