If the speakers are brand new that could be the problem. A few years ago I purchased a new pair of the Studio 60.V2 and experienced the exact same issue. I still remember listening to a new Jackson Browne album and hearing his voice scraping through the speakers. I was going to return them. After a few weeks of playing/break in this harshness went away. This was verified with the Jackson Browne album. His vocal was smooth and clear.
Been a believer in speaker break in ever since.
Been a believer in speaker break in ever since.