"Harsh" is just about the last word to describe Joseph speakers.
This is a case where the unanimous reviews have it right, where they basically all note how smooth, unmechanical and hash-free the Joseph Pulsars sound. It would be even moreso likely with the Graphene version (if they follow the Graphene Perspectives in flattening the very highest frequencies some more).
I have very sensitive ears and my Joseph Perspectives are just about the smoothest sounding speaker I've ever heard.