Epos speakers - no longevity?


I have recently had an Epos M Sub turn into a paperweight and a pair of Epic 5’s start squeaking on lows.  Gently used - low hours - low volumes — Cambridge Audio 840A V2, Cambridge Audio DAC, Cambridge Audio CD.  Jazz/classical.  They are by no means new but I am shocked at two failures on light duty.  Is this common?  Great while they worked - garbage now - look brand new.  Curious if others have had similar experiences.
craisin1
Planed obsolescence seems modern audios not built to last. Much can not be properly repaired and is designed to be binned not rebuilt. 
I have older Epos M5 and had M16 and they are built like a tank. No problems and fabulous sound. Seems all subs with electronics eventually have issues. It's a matter of when will they act up. Not so much speakers. I am not thrilled with the newer Epos sound. Their newer soft dome domes have an edge that I never experienced with their metal dome. Usually it's the other way around..
Much appreciate the responses.  

Currently running the same source through Tekton speakers and sub.  Sounds outstanding -- no issues.  Makes me completely mental to have expensive gear die after light use and careful handling - especially since they sounded great when they were up.  However, I figured I was purchasing speakers for the long run - not 6 years.

Power spike is an interesting theory but I have speakers connected to amp and use an ac line filter.

This may push me over the edge to purchase a pair of Pro Ac speakers - a friend has them and I have never had an audio experience as fulfilling as listening to them ~ magical.  Just need to win the lottery....