Wayne Parham Messages: 18782 Registered: January 2001
Illuminati (33rd Degree)
It might be a loose wire - That would sure make the repair easier and less expensive. So it's worth looking at. But if the wires are snug, then you probably have blown the speaker. The most common failure mode of a loudspeaker is thermal, where the voice coil gets hot enough to weaken the adhesive that holds it in the former. So it unwinds and buzzes, eventually rubbing through. You can't see this damage on casual inspection, as it is inside the motor structure. Another common failure mode is mechanical, which is usually obvious on casual inspection as the cone or suspension is ripped.