What's wrong with my almost new speakers?


I purchased a pair of new speakers less than 2 yrs ago. They sounded just fine to begin with, but within 1 year they became "irratating" after a short listen. I have purchased new speakers since then from Focal and Harbeth, and both of these pairs sound wonderful. What's wrong with the speakers from 2 yrs ago? Bad crossovers? Bad drivers?
We do not listen to music at loud levels.
mc240
What speakers are they?
What amps are you using to drive them?

Awfully tough to give you advice without knowing any of the specifics!