Audiophile Speakers with 25 yr + Longevity

Cones and domes will likely be more durable than stats, ribbons and other planar types.

Well, I would like to mention the older Mirage M series speakers. Not much for looks but they were very well made. The main drivers do NOT require new surrounds like Infinity speakers. I had a 20 year old pair and they sounded as new.

Crossover capacitors can go out of spec over time and electrical joints can corrode. Large woofers with heavy magnets can sag and start to rub. Even rubber surrounds can dry out and lose flexibility which can alter bass performance. Air tight seals can dry up and leak. In general the speakers will still produce sound, but not as originally designed.