cracking/disintegrating speaker

you should have the dust cap replaced, which can be done, or have the speaker reconed (which is sort of an overkill solution, but might be easier for the tech/safer in the long run). The dust cap keeps particulate (like, say, little bits of itself that are flaking off) out of the voice coil.

thanks

oh yeah, when you have it reconed, tell the person who does it to clean the voice coil gap in order to remove any crap that might have gotten in there already.