Magnepan 3.7i vocals sound harsh

Noticing vocals are sounding harsh and grainy on the Maggie's on both lps and CD's, music sounds great. Using a parasound 2.1 integrated.
Currently have resistors installed on speakers but same harshness on vocals without.
I would suspect it's either the Halo integrated or cables.  I always thought the Halo was bright when I had it in my system.
I really like my Halo 2.1 with MG12 speakers. It has mellowed out their aggressive nature. I play it medium volume at most as I live in an apartment.


also the guy who sold me the Halo said it's sound changes a lot when using different speaker cables. (I use AQ Type 4)