Magnepan 3.7i vocals sound harsh

I have owned Maggies 3.5Rs and Parasound 2.1. I finally got rid of the Maggies for similar reasons as you, replaced them Emerald Physics KC IIs, an absolute bargain, I also upgraded to Parasound Halo P 5, which has a lot more more balls than the 2.1

hth

Waiting to receive some 1.5 and 2 ohm resistors in the mail.
Also looking into possible amp replacement.

Purchased 1.5 and 2.0 resistors fron Magnepan arrived but when installed take all the life out of my listening. Gone is all the high end magic . I'll go back to just jumpers maybe try a different amp or more diffusion .

The higher ohm fuses will only attenuate the high frequencies and will not affect midrange where most vocals live. Try diffusion but I doubt that’ll address your issue. I tend to agree with an earlier posting pointing to this harshness as a possible sign that the amp is straining although the harshness should normally be more evident in higher frequencies.

I did it spent above my means and bought a Pass 250.8 and XP 10 pre.
While the Parasound Hint was a great match with the 1.7i the sound wasn't the same with the 3.7i. The Pass takes control and is more musical in every aspect as it should be at 5X the cost.   There is still some grain in some 60's rock but I'm guessing this is just bad recording.