How long should high quality speakers last?

My Krix Euphonics were purchased in the mid to late 80's, they were demonstrators from a shop that was closing. The surrounds are butyl type material, not foam so no degradation yet.. For a period in the mid 90's I drove them with a pair of Carver M400t amps, safe to say there was abuse then... Now they are powered by a Carver M500t, modded and overhauled by Nelion in Mich. My musical tastes have matured, as has my need for speed. They are still outstanding speakers, and can probably keep going, But I'm planning a move, and have a limited budget, so maybe a used pair of Dali or Monitor Silvers??? I prefer floor standing towers... My little tube system in the bedroom runs a pair of older Totem, Arros.

Until they no longer sound good to you, or you notice that "something's wrong".  I had to replace a tweeter on one of my speakers a few years ago; both recognizing the problem and accomplishing the replacement were "no-brainers".

My Hartleys are 45 years old, sound great.  I ripped the x-overs out and use a Marchand electronic x-over (and four Pass lab amps). They have butyl surrounds as well.

They'll outlive me...big enough to bury me in one of them.

Regards,

barts

Good question!  Good replies!  Good post!  Thanks!

Infinity Renaissance 90's are about 30 years old and sound perfect.   Bought maybe the last EMIT tweeters from the mfg around 2000 and never used one.  Bought a spare set of speakers and sold them after 10 years.  In my late 60 's so it'll be a test as what lasts longer.