I had a pair of Ohm Walsh speakers last over 30 years and was used daily. I did replace the drivers after the 30 year mark with an upgrade kit from Ohm.
As long as it is in a normal humidity and temperature environment it will last longer than you might think.
How long should high quality speakers last?
My Zu Omen Def MKii (rev B) are going on 13-14 years old. The speakers sound wonderful. I have no intention of parting with them. The speakers came with the latest ZU tweeter design. How long should I expect the speakers to last without any issues? I do not abuse the speakers and run them with my Luxman 595ase amp.