Not really. The only thing that usually wears out is the foam/rubber surrounds on them primarily! The voice coils could melt, if you clip the speakers, but you'd hear it for sure!...sound buzzy, or stop working! Basically, if the surrounds are fine, and your speaker drivers aren't blown, they'll sound about as good as is possible. Your compontents and cables can degrade over time. Actually, check your "connections" to see if they have oxidized or need cleaning!...wires, cables, etc. I've had preamps and wires that got soft sounding over time, so you could check your system! good luck.
However, one school of thought is that your speakers are getting pretty old, and you might consider selling for newer models, before the value drops even more...and thus upgrade to newer models. Other wise, no worries...
However, one school of thought is that your speakers are getting pretty old, and you might consider selling for newer models, before the value drops even more...and thus upgrade to newer models. Other wise, no worries...