Loudspeakers - how best to prolong their lifetime?


Another thread, regarding obtaining speakers "for life" got me thinking about the lifetime of our speakers. Let's assume, for the sake of the argument, that we have a set that we really don't want to lose (just what I own right now). Is there anything that one can do to prolong their lifetime? We'll assume that we look after them regarding the power that we throw at them and that we don't play them excessively loud and blow the cones.

I recall my first "real" speakers, which were Castle Kendals. After a few years in storage, following an upgrade, I went back to them to use in my third system. They sounded terrible when I connected them up and the removal of the grill showed just why - the cone's foam surrounds had disintegrated! I pulled the two sets of spares out, ones that I had obtained from Castle as backups, and they had also gone belly-up. My current speakers have glass-fibre reinforcement so I expect some longevity.

Is there anything to do or do we just have to take what we are dealt?
niacin
For the last couple of years, my Apogee Duetta Signature (1993 build) are used with a pair of subwoofers (even though they do 28hz....and sound great doing it!)

I would rather not put them into the "dreaded" Apogee bass buzz mode any sooner than I have to (although I know the "BUZZ" will strike someday regardless).

Dave
Don't let them be found without the grill with small kids around. Otherwise, these kids will not be able to resist putting their fingers to the drivers and test the impact of their little fingers on the tweeter or other drivers...:-)
i keep my Meadowlark Blue herron 2's covered with blankets when not in use to keep the light off of them and curious hands at bay as well.