Is subwoofer failure the norm?

I've only owned one sub (a 28 year old Mirage bought brand new), and I've nursed it for the last 5 years with judicious use of contact cleaner. I thought last November was the death knell, but somehow it stopped squealing after my 9th or 10th dose. Even the foam surround is intact, and sounds like the day I bought it.

I've seen various forum posters mention their sub failures, but I've been under the impression that it's because they use switching power supplies or were abused.


Author of "Status 101: How To Keep Up In A World That Keeps Score While Buying Into Buying Less"