I'm looking at doing an overhaul of a classroom that hosts both spoken word and video presentations that sometimes include music. It currently has in-ceiling 8" Lowell 25 volt speakers (similar to their current model 810-T72) set at 1 watt. They are at least 20 years old.
Overall it sounds bad. Part of the issue is that the frequency response isn't good enough for the source signal. On those grounds alone, they need to be replaced.
What I'm specifically wondering about is, in this type of speaker, is there any chance of speaker components wearing out over time and thus affecting its performance?