Do make sure they are wired correctly; I had this problem with a pair of tannoys. Very harsh treble and brittle sound that made them sound like crap. The midrange was very strange and basically I hated the speaker. Found out my amp was sending out a reversed polarity signal.... Reversed all the speaker wires and wow, my speakers were alive for the first time.
I don't have the amp anymore, but it was a NAD.
I don't have the amp anymore, but it was a NAD.