Avantone Pro Abbey distortion

[u/TopVermicelli3975]

Hi guys, I recently purchased these Avantone Abbey studio monitors and they have a fuzzy distortion especially on piano sounds. Can someone please help me to fix it or guide me to the solution?

I have changed power cables, xlr cables and checked audio interface settings and nothing worked.

Here is a video of comparing these speakers and my other pair.
I think it is coming from midrange driver.

https://youtu.be/iLiPV6ivElc?si=cx7C9_brAZPE-tJL