Yeah, generally no need if fairly new, but what apparently changes the most to affect its sonics is diaphragm fatigue, which for alum. means it work hardens, becoming brittle at junctions and since the surround is the primary HF source, it gets decoupled a bit from the dome, changing its compliance some too, so a little lower Fs combined with a more rolled off HF it sounds a bit 'fuller' and less 'crisp' as it ages.

GM